WO2001010552A1 - Materiau photocatalytique, article photocatalytique et procede de preparation de ceux-ci - Google Patents
Materiau photocatalytique, article photocatalytique et procede de preparation de ceux-ci Download PDFInfo
- Publication number
- WO2001010552A1 WO2001010552A1 PCT/JP2000/005247 JP0005247W WO0110552A1 WO 2001010552 A1 WO2001010552 A1 WO 2001010552A1 JP 0005247 W JP0005247 W JP 0005247W WO 0110552 A1 WO0110552 A1 WO 0110552A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- photocatalyst
- titanium oxide
- titanium
- nitrogen
- photocatalytic
- Prior art date
Links
- 230000001699 photocatalysis Effects 0.000 title claims abstract description 97
- 238000000034 method Methods 0.000 title claims abstract description 64
- 239000000463 material Substances 0.000 title claims abstract description 45
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims abstract description 242
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 claims abstract description 210
- 239000000126 substance Substances 0.000 claims abstract description 94
- 125000004433 nitrogen atom Chemical group N* 0.000 claims abstract description 90
- 239000013078 crystal Substances 0.000 claims abstract description 74
- 239000010936 titanium Substances 0.000 claims abstract description 69
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 48
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 47
- 239000001301 oxygen Substances 0.000 claims abstract description 47
- 239000000758 substrate Substances 0.000 claims abstract description 31
- 239000010409 thin film Substances 0.000 claims abstract description 18
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 166
- 239000010408 film Substances 0.000 claims description 159
- 239000011941 photocatalyst Substances 0.000 claims description 138
- 229910052757 nitrogen Inorganic materials 0.000 claims description 135
- 229910052719 titanium Inorganic materials 0.000 claims description 57
- 239000012298 atmosphere Substances 0.000 claims description 55
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims description 52
- 238000010438 heat treatment Methods 0.000 claims description 47
- 238000004519 manufacturing process Methods 0.000 claims description 43
- 239000007789 gas Substances 0.000 claims description 41
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 claims description 38
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 34
- 239000000839 emulsion Substances 0.000 claims description 33
- 239000000203 mixture Substances 0.000 claims description 30
- NRTOMJZYCJJWKI-UHFFFAOYSA-N Titanium nitride Chemical compound [Ti]#N NRTOMJZYCJJWKI-UHFFFAOYSA-N 0.000 claims description 29
- 229910001873 dinitrogen Inorganic materials 0.000 claims description 29
- 239000000919 ceramic Substances 0.000 claims description 21
- 229910052751 metal Inorganic materials 0.000 claims description 21
- 239000002184 metal Substances 0.000 claims description 21
- 239000000725 suspension Substances 0.000 claims description 21
- 238000010586 diagram Methods 0.000 claims description 20
- 238000001228 spectrum Methods 0.000 claims description 18
- 239000000243 solution Substances 0.000 claims description 17
- -1 titanium alkoxide Chemical class 0.000 claims description 17
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 17
- 150000002500 ions Chemical class 0.000 claims description 14
- 239000000377 silicon dioxide Substances 0.000 claims description 13
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 11
- 239000007864 aqueous solution Substances 0.000 claims description 11
- QJGQUHMNIGDVPM-UHFFFAOYSA-N nitrogen group Chemical group [N] QJGQUHMNIGDVPM-UHFFFAOYSA-N 0.000 claims description 11
- 229910021529 ammonia Inorganic materials 0.000 claims description 10
- CPLXHLVBOLITMK-UHFFFAOYSA-N Magnesium oxide Chemical compound [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 claims description 9
- OAKJQQAXSVQMHS-UHFFFAOYSA-N Hydrazine Chemical compound NN OAKJQQAXSVQMHS-UHFFFAOYSA-N 0.000 claims description 8
- MCMNRKCIXSYSNV-UHFFFAOYSA-N Zirconium dioxide Chemical compound O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 claims description 8
- 239000012535 impurity Substances 0.000 claims description 8
- 238000005468 ion implantation Methods 0.000 claims description 8
- 150000003863 ammonium salts Chemical class 0.000 claims description 7
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims description 6
- 238000009841 combustion method Methods 0.000 claims description 6
- 238000001704 evaporation Methods 0.000 claims description 6
- 230000001590 oxidative effect Effects 0.000 claims description 6
- 238000006467 substitution reaction Methods 0.000 claims description 6
- 238000000026 X-ray photoelectron spectrum Methods 0.000 claims description 5
- 238000002485 combustion reaction Methods 0.000 claims description 5
- 239000000395 magnesium oxide Substances 0.000 claims description 5
- 238000009832 plasma treatment Methods 0.000 claims description 5
- 150000003839 salts Chemical class 0.000 claims description 5
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 claims description 4
- 229910002651 NO3 Inorganic materials 0.000 claims description 4
- JUNWLZAGQLJVLR-UHFFFAOYSA-J calcium diphosphate Chemical compound [Ca+2].[Ca+2].[O-]P([O-])(=O)OP([O-])([O-])=O JUNWLZAGQLJVLR-UHFFFAOYSA-J 0.000 claims description 4
- 230000008020 evaporation Effects 0.000 claims description 4
- 239000011777 magnesium Substances 0.000 claims description 4
- 229910052749 magnesium Inorganic materials 0.000 claims description 4
- 229910021645 metal ion Inorganic materials 0.000 claims description 4
- 239000013077 target material Substances 0.000 claims description 4
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 claims description 3
- 239000008346 aqueous phase Substances 0.000 claims description 3
- 125000002887 hydroxy group Chemical group [H]O* 0.000 claims description 3
- 150000002736 metal compounds Chemical class 0.000 claims description 2
- 239000004094 surface-active agent Substances 0.000 claims description 2
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 claims 1
- 238000011282 treatment Methods 0.000 abstract description 18
- 229910011210 Ti—O—N Inorganic materials 0.000 abstract description 9
- 230000001747 exhibiting effect Effects 0.000 abstract description 7
- 239000000843 powder Substances 0.000 description 46
- 230000000694 effects Effects 0.000 description 30
- 239000002245 particle Substances 0.000 description 26
- 229910011208 Ti—N Inorganic materials 0.000 description 20
- 230000006870 function Effects 0.000 description 19
- 230000015572 biosynthetic process Effects 0.000 description 15
- 238000004544 sputter deposition Methods 0.000 description 14
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 12
- 239000004065 semiconductor Substances 0.000 description 12
- 238000004364 calculation method Methods 0.000 description 11
- 238000000354 decomposition reaction Methods 0.000 description 11
- 239000000835 fiber Substances 0.000 description 11
- 239000011882 ultra-fine particle Substances 0.000 description 11
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 10
- 230000003197 catalytic effect Effects 0.000 description 10
- 239000007788 liquid Substances 0.000 description 10
- 239000012071 phase Substances 0.000 description 10
- 150000001450 anions Chemical class 0.000 description 9
- 239000003054 catalyst Substances 0.000 description 9
- CXKWCBBOMKCUKX-UHFFFAOYSA-M methylene blue Chemical group [Cl-].C1=CC(N(C)C)=CC2=[S+]C3=CC(N(C)C)=CC=C3N=C21 CXKWCBBOMKCUKX-UHFFFAOYSA-M 0.000 description 9
- 229960000907 methylthioninium chloride Drugs 0.000 description 9
- 239000004033 plastic Substances 0.000 description 9
- 229920003023 plastic Polymers 0.000 description 9
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 8
- 239000002131 composite material Substances 0.000 description 8
- 238000002474 experimental method Methods 0.000 description 8
- 230000003287 optical effect Effects 0.000 description 8
- 238000002441 X-ray diffraction Methods 0.000 description 7
- 238000000576 coating method Methods 0.000 description 7
- 239000011521 glass Substances 0.000 description 7
- 125000000449 nitro group Chemical group [O-][N+](*)=O 0.000 description 7
- 230000008569 process Effects 0.000 description 7
- 150000003609 titanium compounds Chemical class 0.000 description 7
- 150000004703 alkoxides Chemical class 0.000 description 6
- 238000000137 annealing Methods 0.000 description 6
- 229910052786 argon Inorganic materials 0.000 description 6
- 239000011651 chromium Substances 0.000 description 6
- 239000011248 coating agent Substances 0.000 description 6
- 150000001875 compounds Chemical class 0.000 description 6
- 230000031700 light absorption Effects 0.000 description 6
- 239000012299 nitrogen atmosphere Substances 0.000 description 6
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 6
- 238000012545 processing Methods 0.000 description 6
- XJDNKRIXUMDJCW-UHFFFAOYSA-J titanium tetrachloride Chemical compound Cl[Ti](Cl)(Cl)Cl XJDNKRIXUMDJCW-UHFFFAOYSA-J 0.000 description 6
- 238000010521 absorption reaction Methods 0.000 description 5
- 238000004458 analytical method Methods 0.000 description 5
- 210000003323 beak Anatomy 0.000 description 5
- 238000006243 chemical reaction Methods 0.000 description 5
- 230000007062 hydrolysis Effects 0.000 description 5
- 238000006460 hydrolysis reaction Methods 0.000 description 5
- 239000011261 inert gas Substances 0.000 description 5
- 238000005259 measurement Methods 0.000 description 5
- 239000005416 organic matter Substances 0.000 description 5
- 239000010453 quartz Substances 0.000 description 5
- 229910052717 sulfur Inorganic materials 0.000 description 5
- 238000002835 absorbance Methods 0.000 description 4
- 229910052782 aluminium Inorganic materials 0.000 description 4
- 125000004429 atom Chemical group 0.000 description 4
- 229910052796 boron Inorganic materials 0.000 description 4
- 229910052799 carbon Inorganic materials 0.000 description 4
- 230000008859 change Effects 0.000 description 4
- 229910052804 chromium Inorganic materials 0.000 description 4
- 238000002425 crystallisation Methods 0.000 description 4
- 230000008025 crystallization Effects 0.000 description 4
- 238000000151 deposition Methods 0.000 description 4
- 229910052731 fluorine Inorganic materials 0.000 description 4
- 239000011164 primary particle Substances 0.000 description 4
- 229910052710 silicon Inorganic materials 0.000 description 4
- 239000010703 silicon Substances 0.000 description 4
- 239000007921 spray Substances 0.000 description 4
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 description 3
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 description 3
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 3
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 description 3
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 3
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 3
- 229910003110 Mg K Inorganic materials 0.000 description 3
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 3
- 229910003077 Ti−O Inorganic materials 0.000 description 3
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 3
- 235000010724 Wisteria floribunda Nutrition 0.000 description 3
- QCWXUUIWCKQGHC-UHFFFAOYSA-N Zirconium Chemical compound [Zr] QCWXUUIWCKQGHC-UHFFFAOYSA-N 0.000 description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 3
- 229910052791 calcium Inorganic materials 0.000 description 3
- 239000011575 calcium Substances 0.000 description 3
- 230000007423 decrease Effects 0.000 description 3
- MTHSVFCYNBDYFN-UHFFFAOYSA-N diethylene glycol Chemical compound OCCOCCO MTHSVFCYNBDYFN-UHFFFAOYSA-N 0.000 description 3
- 229910001882 dioxygen Inorganic materials 0.000 description 3
- 239000002019 doping agent Substances 0.000 description 3
- 239000003995 emulsifying agent Substances 0.000 description 3
- 239000010419 fine particle Substances 0.000 description 3
- 239000011737 fluorine Substances 0.000 description 3
- 238000007733 ion plating Methods 0.000 description 3
- 239000003350 kerosene Substances 0.000 description 3
- 238000001755 magnetron sputter deposition Methods 0.000 description 3
- VLKZOEOYAKHREP-UHFFFAOYSA-N n-Hexane Chemical compound CCCCCC VLKZOEOYAKHREP-UHFFFAOYSA-N 0.000 description 3
- 150000004767 nitrides Chemical class 0.000 description 3
- 238000005121 nitriding Methods 0.000 description 3
- 150000002894 organic compounds Chemical class 0.000 description 3
- 239000011368 organic material Substances 0.000 description 3
- 125000004430 oxygen atom Chemical group O* 0.000 description 3
- 239000002994 raw material Substances 0.000 description 3
- 230000009467 reduction Effects 0.000 description 3
- 238000003980 solgel method Methods 0.000 description 3
- 239000002904 solvent Substances 0.000 description 3
- 238000005507 spraying Methods 0.000 description 3
- 238000003756 stirring Methods 0.000 description 3
- 239000004408 titanium dioxide Substances 0.000 description 3
- 238000002834 transmittance Methods 0.000 description 3
- 238000001771 vacuum deposition Methods 0.000 description 3
- 229910052720 vanadium Inorganic materials 0.000 description 3
- 238000007740 vapor deposition Methods 0.000 description 3
- 229910052726 zirconium Inorganic materials 0.000 description 3
- IKHGUXGNUITLKF-UHFFFAOYSA-N Acetaldehyde Chemical compound CC=O IKHGUXGNUITLKF-UHFFFAOYSA-N 0.000 description 2
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 description 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 2
- KFZMGEQAYNKOFK-UHFFFAOYSA-N Isopropanol Chemical compound CC(C)O KFZMGEQAYNKOFK-UHFFFAOYSA-N 0.000 description 2
- LRHPLDYGYMQRHN-UHFFFAOYSA-N N-Butanol Chemical compound CCCCO LRHPLDYGYMQRHN-UHFFFAOYSA-N 0.000 description 2
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 description 2
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 description 2
- 238000004220 aggregation Methods 0.000 description 2
- 230000002776 aggregation Effects 0.000 description 2
- 239000011230 binding agent Substances 0.000 description 2
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 description 2
- 239000000920 calcium hydroxide Substances 0.000 description 2
- 229910001861 calcium hydroxide Inorganic materials 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 239000000356 contaminant Substances 0.000 description 2
- 230000003247 decreasing effect Effects 0.000 description 2
- 230000008021 deposition Effects 0.000 description 2
- 239000006185 dispersion Substances 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 230000001804 emulsifying effect Effects 0.000 description 2
- 238000010304 firing Methods 0.000 description 2
- 229910052739 hydrogen Inorganic materials 0.000 description 2
- 239000001257 hydrogen Substances 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 238000010884 ion-beam technique Methods 0.000 description 2
- 238000004898 kneading Methods 0.000 description 2
- 239000012528 membrane Substances 0.000 description 2
- 125000000325 methylidene group Chemical group [H]C([H])=* 0.000 description 2
- 229910017604 nitric acid Inorganic materials 0.000 description 2
- 239000003921 oil Substances 0.000 description 2
- 239000003960 organic solvent Substances 0.000 description 2
- DCKVFVYPWDKYDN-UHFFFAOYSA-L oxygen(2-);titanium(4+);sulfate Chemical compound [O-2].[Ti+4].[O-]S([O-])(=O)=O DCKVFVYPWDKYDN-UHFFFAOYSA-L 0.000 description 2
- 239000003973 paint Substances 0.000 description 2
- 229910052698 phosphorus Inorganic materials 0.000 description 2
- 238000007146 photocatalysis Methods 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- BDERNNFJNOPAEC-UHFFFAOYSA-N propan-1-ol Chemical compound CCCO BDERNNFJNOPAEC-UHFFFAOYSA-N 0.000 description 2
- 239000012495 reaction gas Substances 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 238000001179 sorption measurement Methods 0.000 description 2
- 238000004611 spectroscopical analysis Methods 0.000 description 2
- 229910000349 titanium oxysulfate Inorganic materials 0.000 description 2
- 229910000348 titanium sulfate Inorganic materials 0.000 description 2
- VXUYXOFXAQZZMF-UHFFFAOYSA-N titanium(IV) isopropoxide Chemical compound CC(C)O[Ti](OC(C)C)(OC(C)C)OC(C)C VXUYXOFXAQZZMF-UHFFFAOYSA-N 0.000 description 2
- ZNOKGRXACCSDPY-UHFFFAOYSA-N tungsten trioxide Chemical compound O=[W](=O)=O ZNOKGRXACCSDPY-UHFFFAOYSA-N 0.000 description 2
- KVGZZAHHUNAVKZ-UHFFFAOYSA-N 1,4-Dioxin Chemical compound O1C=COC=C1 KVGZZAHHUNAVKZ-UHFFFAOYSA-N 0.000 description 1
- DHVBMEDBXREIAW-UHFFFAOYSA-N 2-aminoethanol;2-(2-hydroxyethylamino)ethanol Chemical compound NCCO.OCCNCCO DHVBMEDBXREIAW-UHFFFAOYSA-N 0.000 description 1
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 1
- 206010021143 Hypoxia Diseases 0.000 description 1
- MKYBYDHXWVHEJW-UHFFFAOYSA-N N-[1-oxo-1-(2,4,6,7-tetrahydrotriazolo[4,5-c]pyridin-5-yl)propan-2-yl]-2-[[3-(trifluoromethoxy)phenyl]methylamino]pyrimidine-5-carboxamide Chemical compound O=C(C(C)NC(=O)C=1C=NC(=NC=1)NCC1=CC(=CC=C1)OC(F)(F)F)N1CC2=C(CC1)NN=N2 MKYBYDHXWVHEJW-UHFFFAOYSA-N 0.000 description 1
- AKNUHUCEWALCOI-UHFFFAOYSA-N N-ethyldiethanolamine Chemical compound OCCN(CC)CCO AKNUHUCEWALCOI-UHFFFAOYSA-N 0.000 description 1
- CTQNGGLPUBDAKN-UHFFFAOYSA-N O-Xylene Chemical compound CC1=CC=CC=C1C CTQNGGLPUBDAKN-UHFFFAOYSA-N 0.000 description 1
- 102000035195 Peptidases Human genes 0.000 description 1
- 108091005804 Peptidases Proteins 0.000 description 1
- KJTLSVCANCCWHF-UHFFFAOYSA-N Ruthenium Chemical compound [Ru] KJTLSVCANCCWHF-UHFFFAOYSA-N 0.000 description 1
- 229910052581 Si3N4 Inorganic materials 0.000 description 1
- 229910004298 SiO 2 Inorganic materials 0.000 description 1
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 description 1
- GSEJCLTVZPLZKY-UHFFFAOYSA-N Triethanolamine Chemical compound OCCN(CCO)CCO GSEJCLTVZPLZKY-UHFFFAOYSA-N 0.000 description 1
- 239000004904 UV filter Substances 0.000 description 1
- 238000004833 X-ray photoelectron spectroscopy Methods 0.000 description 1
- 229910021536 Zeolite Inorganic materials 0.000 description 1
- 238000000862 absorption spectrum Methods 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 239000003905 agrochemical Substances 0.000 description 1
- 150000001298 alcohols Chemical class 0.000 description 1
- 230000000844 anti-bacterial effect Effects 0.000 description 1
- 229910052787 antimony Inorganic materials 0.000 description 1
- 150000004945 aromatic hydrocarbons Chemical class 0.000 description 1
- 229910052785 arsenic Inorganic materials 0.000 description 1
- IWLUJCZGMDWKRT-UHFFFAOYSA-N azane oxygen(2-) titanium(4+) Chemical compound N.[O-2].[Ti+4].[O-2] IWLUJCZGMDWKRT-UHFFFAOYSA-N 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- 229910052794 bromium Inorganic materials 0.000 description 1
- 238000001354 calcination Methods 0.000 description 1
- 150000001768 cations Chemical class 0.000 description 1
- 238000005229 chemical vapour deposition Methods 0.000 description 1
- 238000000366 colloid method Methods 0.000 description 1
- 239000008119 colloidal silica Substances 0.000 description 1
- 239000004567 concrete Substances 0.000 description 1
- 238000012790 confirmation Methods 0.000 description 1
- 238000012885 constant function Methods 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- PMHQVHHXPFUNSP-UHFFFAOYSA-M copper(1+);methylsulfanylmethane;bromide Chemical compound Br[Cu].CSC PMHQVHHXPFUNSP-UHFFFAOYSA-M 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 239000010432 diamond Substances 0.000 description 1
- LVTYICIALWPMFW-UHFFFAOYSA-N diisopropanolamine Chemical compound CC(O)CNCC(C)O LVTYICIALWPMFW-UHFFFAOYSA-N 0.000 description 1
- 229940043276 diisopropanolamine Drugs 0.000 description 1
- HNPSIPDUKPIQMN-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Al]O[Al]=O HNPSIPDUKPIQMN-UHFFFAOYSA-N 0.000 description 1
- CZZYITDELCSZES-UHFFFAOYSA-N diphenylmethane Chemical compound C=1C=CC=CC=1CC1=CC=CC=C1 CZZYITDELCSZES-UHFFFAOYSA-N 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 238000005566 electron beam evaporation Methods 0.000 description 1
- 238000010894 electron beam technology Methods 0.000 description 1
- 238000004453 electron probe microanalysis Methods 0.000 description 1
- 238000001941 electron spectroscopy Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000003502 gasoline Substances 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- 150000002334 glycols Chemical class 0.000 description 1
- 239000001307 helium Substances 0.000 description 1
- 229910052734 helium Inorganic materials 0.000 description 1
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 description 1
- 238000009396 hybridization Methods 0.000 description 1
- 230000003301 hydrolyzing effect Effects 0.000 description 1
- 230000002209 hydrophobic effect Effects 0.000 description 1
- 238000002513 implantation Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 229910052809 inorganic oxide Inorganic materials 0.000 description 1
- 229910052740 iodine Inorganic materials 0.000 description 1
- 239000007791 liquid phase Substances 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 239000011259 mixed solution Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000004570 mortar (masonry) Substances 0.000 description 1
- 238000006386 neutralization reaction Methods 0.000 description 1
- 239000002736 nonionic surfactant Substances 0.000 description 1
- 231100000956 nontoxicity Toxicity 0.000 description 1
- 235000019645 odor Nutrition 0.000 description 1
- 150000002902 organometallic compounds Chemical group 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 229910052574 oxide ceramic Inorganic materials 0.000 description 1
- 239000011224 oxide ceramic Substances 0.000 description 1
- SOQBVABWOPYFQZ-UHFFFAOYSA-N oxygen(2-);titanium(4+) Chemical compound [O-2].[O-2].[Ti+4] SOQBVABWOPYFQZ-UHFFFAOYSA-N 0.000 description 1
- 230000008447 perception Effects 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 238000013032 photocatalytic reaction Methods 0.000 description 1
- 238000006303 photolysis reaction Methods 0.000 description 1
- 238000000053 physical method Methods 0.000 description 1
- 238000005268 plasma chemical vapour deposition Methods 0.000 description 1
- 238000012805 post-processing Methods 0.000 description 1
- 235000019833 protease Nutrition 0.000 description 1
- 238000010298 pulverizing process Methods 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 238000002407 reforming Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 229910052707 ruthenium Inorganic materials 0.000 description 1
- 239000012266 salt solution Substances 0.000 description 1
- 229910052711 selenium Inorganic materials 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 description 1
- 229910052814 silicon oxide Inorganic materials 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
- 230000001954 sterilising effect Effects 0.000 description 1
- 238000004659 sterilization and disinfection Methods 0.000 description 1
- 238000004381 surface treatment Methods 0.000 description 1
- 238000001308 synthesis method Methods 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
- 230000002194 synthesizing effect Effects 0.000 description 1
- 229910052714 tellurium Inorganic materials 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000005979 thermal decomposition reaction Methods 0.000 description 1
- 238000009997 thermal pre-treatment Methods 0.000 description 1
- GPPXJZIENCGNKB-UHFFFAOYSA-N vanadium Chemical compound [V]#[V] GPPXJZIENCGNKB-UHFFFAOYSA-N 0.000 description 1
- 239000008096 xylene Substances 0.000 description 1
- 239000010457 zeolite Substances 0.000 description 1
- 239000011787 zinc oxide Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J21/00—Catalysts comprising the elements, oxides, or hydroxides of magnesium, boron, aluminium, carbon, silicon, titanium, zirconium, or hafnium
- B01J21/06—Silicon, titanium, zirconium or hafnium; Oxides or hydroxides thereof
- B01J21/063—Titanium; Oxides or hydroxides thereof
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J27/00—Catalysts comprising the elements or compounds of halogens, sulfur, selenium, tellurium, phosphorus or nitrogen; Catalysts comprising carbon compounds
- B01J27/24—Nitrogen compounds
-
- B01J35/30—
-
- B01J35/39—
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J37/00—Processes, in general, for preparing catalysts; Processes, in general, for activation of catalysts
- B01J37/02—Impregnation, coating or precipitation
- B01J37/0238—Impregnation, coating or precipitation via the gaseous phase-sublimation
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J37/00—Processes, in general, for preparing catalysts; Processes, in general, for activation of catalysts
- B01J37/34—Irradiation by, or application of, electric, magnetic or wave energy, e.g. ultrasonic waves ; Ionic sputtering; Flame or plasma spraying; Particle radiation
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J37/00—Processes, in general, for preparing catalysts; Processes, in general, for activation of catalysts
- B01J37/34—Irradiation by, or application of, electric, magnetic or wave energy, e.g. ultrasonic waves ; Ionic sputtering; Flame or plasma spraying; Particle radiation
- B01J37/341—Irradiation by, or application of, electric, magnetic or wave energy, e.g. ultrasonic waves ; Ionic sputtering; Flame or plasma spraying; Particle radiation making use of electric or magnetic fields, wave energy or particle radiation
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J37/00—Processes, in general, for preparing catalysts; Processes, in general, for activation of catalysts
- B01J37/34—Irradiation by, or application of, electric, magnetic or wave energy, e.g. ultrasonic waves ; Ionic sputtering; Flame or plasma spraying; Particle radiation
- B01J37/341—Irradiation by, or application of, electric, magnetic or wave energy, e.g. ultrasonic waves ; Ionic sputtering; Flame or plasma spraying; Particle radiation making use of electric or magnetic fields, wave energy or particle radiation
- B01J37/344—Irradiation by, or application of, electric, magnetic or wave energy, e.g. ultrasonic waves ; Ionic sputtering; Flame or plasma spraying; Particle radiation making use of electric or magnetic fields, wave energy or particle radiation of electromagnetic wave energy
- B01J37/346—Irradiation by, or application of, electric, magnetic or wave energy, e.g. ultrasonic waves ; Ionic sputtering; Flame or plasma spraying; Particle radiation making use of electric or magnetic fields, wave energy or particle radiation of electromagnetic wave energy of microwave energy
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J37/00—Processes, in general, for preparing catalysts; Processes, in general, for activation of catalysts
- B01J37/34—Irradiation by, or application of, electric, magnetic or wave energy, e.g. ultrasonic waves ; Ionic sputtering; Flame or plasma spraying; Particle radiation
- B01J37/349—Irradiation by, or application of, electric, magnetic or wave energy, e.g. ultrasonic waves ; Ionic sputtering; Flame or plasma spraying; Particle radiation making use of flames, plasmas or lasers
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
- C01G23/00—Compounds of titanium
- C01G23/04—Oxides; Hydroxides
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2002/00—Crystal-structural characteristics
- C01P2002/50—Solid solutions
- C01P2002/52—Solid solutions containing elements as dopants
- C01P2002/54—Solid solutions containing elements as dopants one element only
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2002/00—Crystal-structural characteristics
- C01P2002/70—Crystal-structural characteristics defined by measured X-ray, neutron or electron diffraction data
- C01P2002/77—Crystal-structural characteristics defined by measured X-ray, neutron or electron diffraction data by unit-cell parameters, atom positions or structure diagrams
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2004/00—Particle morphology
- C01P2004/80—Particles consisting of a mixture of two or more inorganic phases
- C01P2004/82—Particles consisting of a mixture of two or more inorganic phases two phases having the same anion, e.g. both oxidic phases
- C01P2004/84—Particles consisting of a mixture of two or more inorganic phases two phases having the same anion, e.g. both oxidic phases one phase coated with the other
Definitions
- Patent application title Photocatalytic substance, photocatalyst, and method for producing them
- the present invention relates to a photocatalyst substance, a photocatalyst capable of exhibiting photocatalytic activity by irradiation with visible light as well as ultraviolet light, and a method for producing these.
- T i 0 2 titanium dioxide
- C d S sulfuride force Dominiumu
- W 0 3 tungsten trioxide
- Z n O zinc oxide
- These photocatalytic materials are semiconductors, which absorb light to generate electrons and holes, and exhibit various chemical reactions and bactericidal actions.
- a metal element such as Cr (chromium) and V (vanadium) is ion-implanted into an analog-type titanium oxide having high catalytic activity.
- the reforming shifts the light absorption edge of titanium oxide to longer wavelengths, enabling the operation of the titanium oxide catalyst with visible light.
- Japanese Unexamined Patent Application Publication No. 9-2626242 discloses an operation in visible light while maintaining the original performance of titanium oxide by using a special doping method such as Cr and V. Is made possible.
- the titanium oxide photocatalyst can operate in visible light by a technique of ion-implanting a metal element into titanium oxide.
- metal ion implantation is expensive. Therefore, there is a demand that the titanium oxide photocatalyst be synthesized by other methods, that is, synthesis in a solution, or a technique such as sputtering.
- operation with visible light is not possible. This is thought to be due to the aggregation of Cr as a dopant or the formation of an oxide such as Cr203 during the crystallization process.
- Japanese Patent Application Laid-Open No. 2000-14066 published after the two priority claims of the present application discloses a method for forming a photocatalyst in which titanium oxide is doped with a trivalent element. It describes that any one of aluminum, boron, and nitrogen is used as a trivalent element.
- acetoaldehyde is more efficiently produced than titanium oxide powder. It is shown that it can be disassembled.
- the titanium oxide doped with a trivalent element in this publication merely unintentionally doped, that is, mixed with nitrogen, and does not have a structure capable of maximizing the photocatalytic activity in visible light.
- the influence of weak ultraviolet rays emitted by the daylight fluorescent lamp is included.
- the visible light photocatalytic activity has been improved, even though the ultraviolet light photocatalytic activity has been improved due to the structural change of the catalyst body. It becomes a problem.
- the true visible light photocatalytic activity of the nitrogen-doped titanium oxide is considered to be as large as shown in the examples. Absent. Disclosure of the invention
- the present invention is intended to realize a visible light operation of a titanium oxide photocatalyst without using costly techniques such as ion implantation by using a novel material, and to provide a photocatalyst having higher visible light absorption efficiency. Aim.
- the present inventors have conducted theoretical studies of optical characteristics of semiconductors using first-principles calculations, in addition to experimental studies. As a result, it was found that the nitrogen-containing titanium oxide semiconductor of the present invention forms a new level in the band gap of titanium oxide.
- a photocatalyst having a strong catalytic activity in visible light in a wider wavelength range was successfully realized as compared with titanium dioxide.
- the photocatalytic substance according to the present invention has a Ti-0-N configuration in which nitrogen (N) is contained in titanium oxide crystals, and exhibits a photocatalytic action in the visible light region. Therefore, the same photocatalytic action as titanium oxide can be obtained using visible light as operating light. Nitrogen is a very stable and safe substance, and containing it does not cause any practical problems.
- titanium oxide crystal It is also possible to replace a part of the oxygen site of the titanium oxide crystal with a nitrogen atom, or to dope a nitrogen atom between lattices of the titanium oxide crystal, or to dope a nitrogen atom at a crystal grain boundary of the titanium oxide crystal. It is preferable to include nitrogen in the titanium oxide crystal by any one or a combination of these.
- the photocatalyst substance according to the present invention preferably contains, in the titanium oxide crystal, a nitrogen atom doped in a state having a chemical bond with a titanium atom.
- Japanese Patent No. 2917575 discloses that a nitro group (—NO) derived from nitric acid for surface treatment is present.
- Japanese Patent No. 2865065 describes that nitrogen derived from nitric acid in a titanium oxide sol dispersion as a material was present in titanium dioxide by an EPMA method.
- these nitrogens are contaminants to the last, and compounds resulting from these contaminants may have a negative effect on the performance of photocatalysts, especially in the wavelength range of operating light. No new effect is produced.
- the reasons why nitrogen has not produced a novel effect on the wavelength range of operating light of the photocatalyst until now are as follows.
- these contaminated nitrogen atoms only form nitrogen oxides and organic substances inside the photocatalyst, and are not bonded to titanium atoms. For this reason, this mixed nitrogen atom has no effect on the optical characteristics of the semiconductor such as the band gap of titanium oxide as a semiconductor.
- the nitrogen atom of the present invention substitutes a part of the oxygen site of the titanium oxide crystal, or is doped between lattices of the titanium oxide crystal, or doped at the crystal grain boundary of the titanium oxide crystal.
- the XPS spectrum differs from that of conventional nitrogen atoms in titanium oxide because it is characterized by either or a combination of these.
- a chemical bond between a titanium atom and a nitrogen atom exists in the photocatalytic substance.
- the characteristics of the nitrogen-doped photocatalyst of the present invention can be clarified from the analysis of the chemical bonding state of the nitrogen atom by XPS (X-ray Photonics Spectroscopy).
- a peak is in a region of 400 eV or less in a binding energy spectrum of a 1 s shell of a nitrogen atom.
- the compound has a peak in the vicinity of 396 to 397 eV in the binding energy spectrum of the 1 s shell of the nitrogen atom in XPS.
- the nitrogen content X atomic number ratio% is 0 ⁇ X ⁇ 13.
- the nitrogen content is not particularly limited, but according to experiments, is preferably more than 0 and 13% or less. By containing nitrogen in such a range, the suitable photocatalytic function as described above can be obtained.
- oxygen atoms may be excessive or insufficient.
- the photocatalysis is exhibited even in the visible light region having a longer wavelength.
- the composition range may be such that the atomic ratios of titanium, oxygen, and nitrogen, Y, ⁇ , and X, are in the range of 0.4 ⁇ / ( ⁇ + ⁇ ) ⁇ 0.6.
- the crystal phase of ⁇ i-0-N for realizing this may be any of single crystal, polycrystal, or amorphous + polycrystal.
- single crystals and polycrystals tend to have a larger photocatalytic function than amorphous.
- the photocatalytic substance has a titanium oxide crystal on the outer surface side.
- visible light is absorbed by the internal photocatalyst substance to generate electrons and holes, whereby a photocatalytic action can be exhibited in the titanium oxide crystal on the surface. Therefore, visible light can be used as operating light while maintaining the same function as a conventional titanium oxide photocatalyst.
- this configuration is very advantageous for reducing the contact angle of water and imparting hydrophilicity.
- the XPS spectrum of Ti 10 ⁇ has a spectrum derived from an ammonium salt.
- the surface has a mainly C-axis crystal plane orientation.
- These photocatalysts use titanium oxide, silica, alumina, or an inorganic oxide that is a composite thereof, or an organic material such as titanium nitride, silicon nitride, aluminum nitride, a composite nitride thereof, or a composite oxynitride or a fluororesin as a substrate. In some cases, they are used by forming them on the entire surface or a part of those surfaces.
- alumina, silica, zirconia, magnesia, calcium hydroxide, calcium phosphate, amorphous titanium oxide, fluorine resin It may have a form in which at least one selected from those containing nitrogen is supported.
- the photocatalyst substance according to the present invention is preferably manufactured by the following manufacturing method.
- At least one of titanium oxynitride, titanium oxide, titanium nitride, and metallic titanium is used as a target material, and is sputtered in an atmosphere containing nitrogen gas to form a thin film on the base material.
- At least one of titanium oxynitride, titanium oxide, titanium nitride, and metallic titanium is used as the evaporation material, and is deposited or ion-plated in an atmosphere containing nitrogen gas to form a thin film on the substrate.
- the titanium alkoxide solution is manufactured by heat treatment in an atmosphere containing ammonia gas, an atmosphere containing nitrogen gas, or a mixed gas atmosphere of nitrogen and hydrogen.
- At least one of titanium oxynitride, titanium oxide, titanium nitride, and metallic titanium is used as an evaporation material, which is evaporated in a vacuum in an atmosphere containing nitrogen gas, and transferred to another vacuum chamber by differential pressure. This forms a thin film on the base material.
- ions or molecules (excluding nitrate ions) containing nitrogen elements such as ammonia and hydrazine are present in the aqueous metal salt solution or suspension in the aqueous phase of the emulsion and introduced into the reactor.
- the amount of oxygen generated is necessary for the combustion components (oil and surfactant) contained in the emulsion to completely burn and for the metal ions (or metal compounds) contained in the aqueous solution to form the most stable oxide in the atmosphere.
- the required amount of oxygen (hereinafter referred to as the required amount of oxygen) is produced by spray-burning the emulsion in the following atmosphere.
- an aqueous metal salt aqueous solution in the emulsion is used.
- nitrogen-containing gases such as ammonia (excluding nitrogen gas) and introduce them into the reactor. Spray combustion of emulsion in an atmosphere where the oxygen content is less than the required oxygen content.
- Titanium oxide and titanium nitride are mixed and heat-treated at a temperature in the range of 400 to 700 ° C to manufacture.
- a photocatalytic substance is produced by heat-treating or plasma-treating titanium nitride or titanium nitride oxide in an oxidizing atmosphere containing oxygen, ozone, water molecules, or hydroxyl groups.
- Figure 6 shows the spectrum of the 1 s shell of the nitrogen atom by XPS analysis using X-rays and Mg-K.
- the nitrogen atom contained in the conventional titanium oxide photocatalyst The photocatalysts of the present invention differ in the state of chemical bonding of nitrogen atoms. That is, as described above, the nitrogen atom in the conventional titanium oxide forms an oxide or an organic substance, whereas the nitrogen atom in the photocatalyst of the present invention shows a bond with Ti. This indicates that the nitrogen of the present invention is not simply a doping between crystal lattices or a doping between grains, but nitrogen substituted for oxygen in the titanium oxide crystal.
- the present inventors have also studied the photocatalyst of the present invention in theoretical calculation in parallel with the experiment. Specifically, it is one of the first principle calculation methods.
- the electronic state and optical properties of the semiconductor photocatalyst were evaluated by the FLAPW (fu l 1-o ent l a l l i n e l i a n i s e nd-augment e d-p la ne-wave) method.
- Figure 7 shows the calculated density of states (densityofstate; DOS) of the semiconductor Ti10-X. It can be seen that the positions where the impurity ranks are formed differ depending on the substituted species, and that there is a correlation with the ionicity of these substituted species.
- the valence band rises to the minus side from the energy of 0 eV at each state density in Fig. 7, and the conduction band of titanium oxide rises from around 2.5 eV to the plus side. There is a gap between them. Since the reduction level of water is close to the conduction band of titanium oxide, the rise of the valence band is closer to the conduction band of titanium oxide depending on the state of the valence band than the conduction band of titanium oxide to achieve a narrow band gap. It is desirable.
- N nitrogen
- S nitrogen
- S Yo ⁇
- FIG. 8 (a) and 8 (b) show the dependence of the imaginary part (e2xy, e2z) of the dielectric constant function on the energy E (eV) obtained by calculation.
- FIG. 8 (a) is for the Xy direction (perpendicular to the C axis) of the titanium oxide crystal
- FIG. 8 (b) is for the z direction (C axis direction).
- the imaginary part of the permittivity function corresponds to the wavelength dependence of the optical absorption characteristics.
- Ti-0-N when Ti-0-N has a C-axis orientation, it absorbs longer wavelength visible light. This is because the absorption edge in the xy direction is remarkably shifted in the visible light direction, which indicates that the surface of the photocatalyst of the present invention is preferably mainly in the C-axis crystal plane direction.
- light directly incident on the surface has an electric field component in the direction perpendicular to its propagation direction (the direction parallel to the surface), so if the surface has a C-axis crystal orientation, the light in the X-y direction in Fig. 8 (a) This is because visible light can be efficiently absorbed by the light absorption characteristics.
- the change in the electronic state of titanium oxide due to the substitution of the anion X is mainly due to the difference in the atomic level between 0, N and S with respect to the titanium atom. Therefore, when oxygen (0) is replaced by another anion X as in the model used in the above calculation, in addition, even in the case where the anion X interrupts the crystal lattice in a form that distorts the lattice, the case where the anion X exists at the crystal grain boundary, or the combination thereof, the titanium oxide is used as the base If a Ti—X bond is present in the photocatalyst, the effect of the anion substitution of the present invention can be obtained.
- elements such as carbon and boron can replace not only oxygen sites but also titanium sites. In these cases, their electronic states are completely different depending on which site is replaced, even when replacing with the same atom.
- the present invention has been found to be capable of absorbing visible light and exhibiting photocatalytic properties only when a Ti—N bond has a Ti—N chemical bond in the state of a nitrogen atom. It is completed. Among them, the performance is highest when the nitrogen atom replaces the oxygen site of titanium oxide.
- the position of the XPS peak in the N 1 s shell when Ti—N bonds are left in titanium oxide can be predicted from the academic literature. "" National Institute of Standards and Technolo gy (NIST) ", a TiN beak is observed around 396-397 eV. In a paper by N. Saha et al., J. Appl. Phys., 72 (7), pp. 3072 (1992), XPS data for Ti-0-N is described. Although the nitrogen content in this example is much higher than that of the photocatalyst material of the present invention, the N 1 s shell peak of Ti-0-N is observed around 396-397 eV, similar to the NIST Ti N .
- the N 1 s shell XP S peak of the interrupted T i ⁇ —N is obtained on the lower energy side by 61.38 eV from the T i 2p 3/2 beak.
- the substitution type is obtained on the low energy side by 63.63 eV.
- the N 1 s shell peak of the interrupted type appears to be 2.25 eV higher than the N ls shell peak of the substituted type because the bond with the oxygen atom is dominant compared to the substituted type. The result was obtained.
- the Ti-10-N visible light operating photocatalyst of the present invention is a method of substituting a part of the oxygen site of the titanium oxide crystal with a nitrogen atom, or doping a nitrogen atom between lattices of the titanium oxide crystal, or This is a photocatalytic substance in which a titanium oxide crystal contains a nitrogen atom by doping a nitrogen atom into a crystal grain boundary of the titanium oxide or a combination thereof.
- the XPS peak of the N 1 s shell is found below 400 eV.
- the nitrogen atom has a Ti—N chemical bond with the titanium atom of the titanium oxide.
- the nitrogen atom is present in a state of substituting a part of the oxygen site of titanium oxide.
- the XPS beak of N1 s shell is seen around 396-397 eV.
- composition ratio of the powders and film shows these visible light operation photocatalytic performance is described in the Examples below, for example, T i 33. 9 0 64. 7 NL 4, T i 34 ⁇ 65 ⁇ T i 31 0 67 N It was 2 . Therefore, if a state in which N forms a Ti-N bond is realized, the photocatalyst can be operated with visible light in both cases of oxygen excess and oxygen deficiency.
- the atomic ratios Y, ⁇ , and X of titanium, oxygen, and nitrogen may be in the range of 0.4 ⁇ ⁇ /( ⁇ + ⁇ ) ⁇ 0.6.
- FIG. 1 is a diagram showing a configuration of the first embodiment.
- 2 (a) and 2 (b) are diagrams showing a titanium oxide crystal phase.
- FIGS. 3A and 3B are diagrams illustrating a configuration of the second embodiment.
- FIG. 5 (a), 5 (b), and 5 (c) are diagrams showing the fourth embodiment.
- FIG. 6 is a diagram showing a binding energy spectrum (XPS spectrum) of a 1 s shell of a nitrogen atom in the photocatalytic substance of the embodiment.
- FIG. 7 is a diagram showing the density of states of Ti-0-X in which part of the oxygen site has been replaced with X.
- Figs. 8 (a) and 8 (b) show the energy dependence of the imaginary part of the permittivity function.
- FIG. 9 is a diagram showing the wavelength dependence of the absorbance of the photocatalyst.
- FIG. 10 is a diagram showing the contact angle of water on the film surface.
- FIG. 11 is a diagram illustrating characteristics of the stacked photocatalyst.
- FIG. 12 is a diagram showing a comparison of the decomposition performance of organic substances on a photocatalyst.
- FIGS. 13 (a), 13 (b) and 13 (c) are diagrams showing the relationship between the visible light catalyst performance and the bonding state of nitrogen atoms in Example 4.
- FIG. 13 (a), 13 (b) and 13 (c) are diagrams showing the relationship between the visible light catalyst performance and the bonding state of nitrogen atoms in Example 4.
- FIGS. 14A and 14B are diagrams showing the spectrum of the visible light source and the photocatalytic function of the embodiment.
- FIG. 15 is a diagram showing a light absorption spectrum of a photocatalytic substance in Example 10.
- FIG. 16 is a diagram showing a binding energy-spectrum (XPS spectrum) of a 1 s shell of a nitrogen atom in the photocatalytic substance of Example 10.
- FIG. 17 is a diagram illustrating a configuration of an ultrafine particle film generation device according to the thirteenth embodiment.
- FIG. 18 shows a light reflection spectrum of Example 16.
- FIG. 19 is a diagram showing a photocatalytic function of the photocatalytic substance of the first embodiment under a fluorescent lamp.
- FIG. 1 is a diagram showing the configuration of an embodiment 1, the S i0 2 substrate 10, a photocatalytic substance Thus, a Ti—0—N film 12 is formed.
- the Ti 10- ⁇ film 12 has a structure in which a part of the oxygen site of the titanium oxide crystal is replaced by a nitrogen atom. Note that a structure in which nitrogen atoms are doped between lattices of the titanium oxide crystal may be used, or both may be mixed.
- the composition ratio of each element in the Ti—0— ⁇ film 12 is, for example, Ti 31 067 N 2 . Therefore, the Ti-0-N film 12 is basically a crystal of titanium oxide, and has a configuration in which N is contained in the titanium oxide film. Further, the crystal phase of the titanium oxide crystal may be rutile or analytic, but is, for example, analytic + rutile.
- Figure 2 (a) shows a rutile-type titanium oxide crystal
- Fig. 2 (b) shows a crystal unit cell of an analog-type titanium oxide crystal.
- a small ⁇ indicates T i and a large ⁇ indicates 0.
- a part of this ⁇ is replaced by N, or N enters the space in the crystal or the titanium oxide crystal grain boundary to form T i — 0 — N.
- the Ti-0-N film 12 is formed by RF magnetron sputtering.
- the SiO 2 substrate 10 and the titanium oxide gate are set in a vacuum chamber of an RF magnetron sputtering apparatus. Then, a predetermined amount of N 2 gas and an inert gas (for example, Ar gas) are introduced into the vacuum chamber, and the N 2 gas and the inert gas are spotted in (N 2 + Ar) plasma. This depositing T i one 0- N film 12 on the Yotsute S i 0 2 substrate 10.
- Various substrates such as ceramics can be used for the substrate 10.
- Total gas pressure during sputtering for example 0. 52Pa, N 2 partial pressure, but it may be set in a range of 0% ⁇ N2 partial pressure ⁇ 100%, about 20% to 60% are preferred.
- a heat treatment is performed to crystallize. For example, it can be crystallized by heat treatment at 550 ° C. for about 2 hours in a nitrogen atmosphere. In other words, simply forming a film results in a structure in which polycrystals are mixed in the amorphous phase.However, polycrystallization and single crystallization can be achieved by heat treatment, and titanium and nitrogen are chemically converted. It can have a bond.
- the heat treatment after the film formation can be omitted by forming the Ti-0-N film 12 while heating the Si02 substrate 10, but the annealing after the film formation can be omitted. Photocatalytic performance is inferior in comparison.
- T i-0- N nitrogen atomic ratio% of film the thermal pretreatment 6.6% in the film formation by N 2 partial pressure of 20%, after heat treatment 1.4%, the formation of 100% nitrogen partial pressure was 12.7% before heat treatment and 5% after heat treatment.
- the photocatalytic function was exhibited. Therefore, it was found that the nitrogen content of the Ti— ⁇ —N film is preferably set to 0 ⁇ X ⁇ 13 when the atomic ratio% is X%.
- the photocatalytic function of the Ti-0-N film is excellent after heat treatment, and the nitrogen concentration after heat treatment is preferably several percent or less, particularly preferably 2% or less.
- the Ti—0—N film 12 was formed in the plasma of the N 2 -containing Ar gas using the titanium oxide target, but the TiN (titanium nitride) + 0 2 may be formed in a plasma of gas containing. Further, titanium oxide + TiN can be used as a target.
- T i ingot + (N 2 + 0 2) by vacuum deposition in the gas can also be deposited T i-0- N film 12.
- T i-0—N as a photocatalytic substance is formed into a thin film.
- a binder material for coating it based on fine particles T i-0—N for example, silica, Alumina, fluororesin, those containing nitrogen, those mixed with these compound compounds, silica, alumina, fluororesin whose base material is nitrogen or those containing nitrogen, or
- the present invention is also applicable to the case where Ti-0-N is formed on the entire surface or a part of the outer surface side by using these composite compounds.
- Ti-0- ⁇ i can be produced by various fine particle production methods, sol-gel method, chemical reaction method, etc. based on the above production method. Specific examples will be described later.
- the T i— ⁇ — N photocatalytic substance thus obtained exhibits a photocatalytic function when visible light is incident.
- the Ti—0—N photocatalytic substance is not only Irradiation with visible light alone also exerts a photocatalytic function, improving hydrophilicity (reducing the contact angle of water) and obtaining organic matter resolution. Therefore, not only T i -0-iU ⁇ , but visible light can be used as operating light, and as a result, the photocatalytic function by light irradiation in the ultraviolet-visible range can be significantly improved. In particular, it is significantly superior to titanium oxide photocatalyst in organic matter decomposition function.
- FIG. 3 shows the configuration of the second embodiment.
- S i 0 2 to form a substrate 1 0 T i-0- N film 1 2 on, to form a titanium oxide film 1 4 thereon.
- a two-layer structure is used, but the boundary between the two becomes less clear during the heat treatment process, and N gradually decreases toward the surface.
- a Ti—O / Ti—0— ⁇ film having a tilted composition in which the N atomic weight is smaller near the surface and the titanium oxide is exposed on the outermost surface is formed. Note that the interface between the Ti-0-N film and the titanium oxide film may be kept sharp.
- the gradient composition is not limited to the heat treatment after the formation of the Ti-0-N film and the titanium oxide film, and the gas composition of the atmosphere may be changed according to the deposition state of the film. That is, by gradually decreasing the N 2 partial pressure in the atmosphere, Ru can be the surface of titanium oxide
- T i- ⁇ - N film and T i 0 2 film parental aqueous (contact angle 0) since prevailed towards T i 0 2 film, as an operation light visible light, T i 0 2 film increased hydrophilicity due to be achieved. That is, in this embodiment, express hydrophilicity by irradiation of visible light alone, and the retention time of the performance can be improved Ri by T i 0 2 film.
- the graded composition T i-0 / T i T i-0- N part 2 2 therein it is also preferable that the particulate having a T i 0 2 part 2 4 outwardly.
- a particulate photocatalyst is mixed in a binder for paint, for example, silica, alumina, fluororesin, or a mixture of these with nitrogen, or a composite oxide of these, and then used as a paint. It is preferable to use it.
- FIGS. 4A and 4B show a configuration of the third embodiment of the present invention.
- the inside of the photocatalyst body of this embodiment is titanium oxide Ti 0 2
- the outermost surface side is Ti 0 -N.
- the Ti-0-N layer at this time may cover the entire outermost surface or may be formed only on a part of the surface.
- Such a configuration is realized when nitriding is performed from the surface side by post-treatment such as heat treatment or plasma treatment, mainly using titanium oxide powder or a thin film as a starting material.
- FIGS. 5 (a), 5 (b) and 5 (c) show a configuration of the fourth embodiment of the present invention.
- the Ti 10-N photocatalyst of the present invention is used by kneading it into an organic fiber or plastic, it is said that the Ti 10-N photocatalyst is decomposed by direct contact with the organic fiber or plastic.
- ceramic having lower catalytic activity is carried on the surface of the Ti-0-N photocatalyst in an island shape, a needle shape or a mesh shape.
- the ceramic is formed in an island shape
- FIG. 5 (b) the ceramic is formed in a mesh (river) shape
- the ceramic is formed in a needle shape.
- the ceramic examples include alumina, silica, zirconia, magnesia, calcium hydroxide, calcium phosphate, amorphous titanium oxide, fluorine resin, nitrogen-containing materials, and composite compounds thereof.
- the reaction in a vacuum chamber is used to recompose and reconstitute the nitrogen-containing titanium oxide after the Ti, 0, N atoms constituting the material are separated by heat, ion beam or plasma irradiation.
- the basic crystal structure of the nitrogen-doped titanium oxide produced in the present invention may be any of an anase, rutile, and blue kite.
- the specific example 1 is a Ti-0-N film corresponding to the first embodiment.
- the substrate was S i 0 2.
- the total gas pressure during the spa ring was 0.52 Pa, and the N2 partial pressure was changed between 0% and 100%.
- the deposition rate was 3-8 nm min.
- a heat treatment was performed at 550 ° C. for 2 hours in a nitrogen atmosphere to crystallize the Ti—N film.
- the crystal phase in the Ti10-N film was ana-yose + rutile, and no TiN was observed.
- composition ratio of the film sputtered in 40% N 2 + Ar after the heat treatment was analyzed by XPS (X-ray electron spectroscopy) to find that it was Ti 31 067 N 2 . Also nitrogen The peaks of the N 1 s shell spectrum were observed at both around 397 eV and around 400 eV, and it was confirmed that a Ti—N bond was present in the Ti—0—N phase.
- the N 2 partial pressure produced varied between 0% and 100%, relative to Netsusho sense the T i-0- N film 550 ° C, when irradiated with Xe lamp 1 hour
- the contact angle ⁇ of water on the membrane surface is shown (the symbol in the figure is the mouth).
- contact angle 0 ⁇ 10 ° hydrophilic In the case of pure titanium oxide (N 2 partial pressure of 0%), depending on the photocatalytic action of ultraviolet rays or the wavelength 200 nm, it is expressed contact angle 0 ⁇ 10 ° hydrophilic.
- 0 T i-0- N films prepared in the presence of N 2 is that have large summer with the increase in the sputtering evening when N 2 partial pressure due to the influence of N. These 0 values are essentially the optimal 6> values possessed by the Ti-0-N films of each composition.
- the symbol in the figure of the characteristic when only the visible light component (wavelength input> 400 nm) is irradiated for one hour to these Ti-0-N films is indicated by the symbol ⁇ .
- the ultraviolet region of 400 nm or less in the irradiation light was cut by an optical filter.
- the properties of the films prepared in a N 2 partial pressure of 20-60% have been reduced to almost the optimum values only by visible light irradiation.
- 6> is considerably larger when irradiated only with visible light.
- the Ti-0-N film is a material that produces a photocatalytic action upon irradiation with visible light.
- Example 1 since the contact angle on the surface of the Ti-0-N film was reduced by irradiation with only visible light, it was clarified that the photocatalyst operates even when irradiated with only visible light. However, focusing on the contact angle 6> of this film from the viewpoint of applications utilizing hydrophilicity such as mirrors and windows, and comparing only the absolute value of the contact angle, the Ti—0—N film of the present invention Is inferior to titanium oxide film. Therefore, in this specific example 2, a photocatalyst having a stacked film configuration of a Ti—O—N film and a titanium oxide film corresponding to the second embodiment was manufactured.
- FIG. 3 (a) S i0 2 substrate 10, the T i over O-N film 12 2200A, a titanium oxide film 14 deposited at 100 OA order, It was formed by performing heat treatment at 550 ° C. for 90 minutes in an oxygen atmosphere.
- a Ti—O / Ti—O—N film having a gradient composition in which the N atomic weight is smaller near the surface of the film and the titanium oxide is exposed on the outermost surface is formed.
- the distribution of nitrogen atoms was observed in the depth direction of the film at 5 OA intervals by XPS, no nitrogen atoms existed at a depth of 5 OA from the outermost surface, and at deeper positions, the nitrogen atoms increased with the depth.
- FIG. 11 shows a measurement example of a contact angle of water of 0. Irradiation in the visible light region of 400 nm or more does not show a decrease in the contact angle of the titanium oxide film.
- the contact angle is reduced even by irradiation with visible light of 400 nm or more, and the contact angle of the titanium oxide film is smaller than 6>. Becomes This effect is maintained for a long time.
- the specific example 2 had the same characteristics even when the total film thickness was 1600 A and 2500 A. Furthermore, a sharp interface was formed instead of a gradient composition, and the composition was gradually changed. The same effect is exhibited when the value is changed to.
- this specific example 2 absorbs ultraviolet and visible light, it has not only the expression of hydrophilicity but also the function of sterilization and decomposition of harmful substances such as dioxin and nitrogen oxides, like titanium oxide. are doing. And these functions are also higher than titanium oxide film. Achieve efficiency.
- Example 3 a comparative example of the performance of decomposing organic substances on the surfaces of the films of Examples 1 and 2 is shown.
- Figure 12 shows the amount of organic matter applied to the surface of each catalyst film decomposed by light irradiation.
- the light source was a Xe lamp, and the irradiation wavelength range was adjusted with a sharp cut filter, and a heat ray absorption filter was used to prevent the temperature of the sample from rising.
- the irradiation light amount is about 13 mW / cm 2 in the ultraviolet light range only.
- the organic substance decomposition performance of the Ti-0-N films of Examples 1 and 2 is excellent, and the performance of the gradient composition film is four times that of the titanium oxide film. It can be seen that it is remarkably excellent. Furthermore, when ultraviolet-visible light irradiation of humans> 200 nm, the organic matter decomposition performance of the Ti-0-N film of Example 1 is much higher than that of the titanium oxide film.
- the Ti-0-N film of the present invention has an extremely excellent ability in decomposing organic substances in photocatalysis.
- the sputtered film fabricated in 40% N 2 —Ar emits visible light of> 40 Onm compared to the commercially available titanium oxide film even at 5mW / cm 2 irradiation, which is equivalent to summer fine weather.
- the results show that the resolution is 4 times higher, and that it is 8 times higher when the light irradiation is> 200 nm.
- a specific example in which a titanium oxide powder is used as an initial material and a nitriding treatment is performed will be described.
- Commercially available rutile-type titanium oxide powder (Ishihara Sangyo, TTO-55 (N)) was treated at 600 ° C for 3 hours in a mixed gas of ammonia and argon.
- the photocatalytic performance was evaluated by the change in the absorbance of the methylene blue-water solution at 670 nm after irradiation with visible light for 10 hours.
- the light source is a 10W fluorescent tube (Matsushita Electric Works, FL 1 ON) with UV cut filter (Fuji Film, SC42) attached around it, and the visible light irradiation was approximately ⁇ 40 Onm.
- the UV intensity was 0.0 ⁇ W / cm 2 (using Topcon photometer, UVR-2 and UD-36).
- C When measuring photocatalysts, photodecomposition of methylene blue without photocatalyst, and The effect of absorbance change due to adsorption in the dark or light adsorption was removed.
- Fig. 13 (a), Fig. 13 (b), and Fig. 13 (c) each show a peak near 397 eV, the composition ratio of Ti-N bonded N, and the peak near 400 eV. It is the N composition ratio possessed, and the ratio of Ti-N bonded N in the total N composition ratio in the photocatalyst powder. 13 (a) and 13 (c), as the number of Ti—N bonded N increases, the catalyst performance under visible light irradiation improves. On the other hand, N without Ti-N bond in Fig.
- the nitrogen in FIG. 13 (b) is considered to be mainly an organic compound or a nitrogen atom forming a nitro group. From these results, it is necessary for the photocatalytic operation of visible light to form Ti-N bonded N in Ti-0-N where a peak is observed around 397 eV. I understand.
- the same effect can be obtained when the titanium oxide powder is treated in a plasma containing nitrogen atoms at a temperature higher than room temperature. Photocatalytic performance is poor when plasma treatment is performed at room temperature.
- Example 4 it was described that the photocatalyst of the present invention can be realized by post-treating the titanium oxide powder.
- the inside of the catalyst body is titanium oxide, In some cases, the outermost surface side is TION.
- a simple coating solution was prepared by mixing colloidal silica and additives with commercially available titanium oxide powder (Ishihara Sangyo, ST-01). This was applied on a glass substrate and dried, and then heat-treated at 150 ° C for 30 minutes in air. When the cross section was observed by SEM (scanning electron microscope), the film thickness was about 50 Onm. Thereafter, this film was heat-treated at 550 ° C. for 30 minutes in a flow of ammonia gas of 75 sccm and argon gas of 100 sccm. As a result of this treatment, the transparent film, which was slightly white, became a yellow transparent film. The structure was analyzed by X-ray diffraction and analyzed in the depth direction by XPS.
- the film surface was Ti-10-N and Si-0-N, and titanium oxide and silicon oxide were near the glass substrate.
- the nitrogen composition ratio has a gradient composition that decreases from the outermost surface to the inside of the film.
- the photocatalytic properties of this film were evaluated. After measuring the light transmission characteristics of the film in the wavelength range of 400 to 750 nm, the film was immersed in a 500 M aqueous solution of methylene blue for 15 minutes and dried in a dark place. After the light transmission characteristics were measured again, visible light with a UV filter (Fuji Film, SC42) attached around a 10W fluorescent tube (Matsushita Electric Works, FL 1 ON) was irradiated for 18 hours. The decomposition rate of methylene blue (MB) after irradiation for 18 hours, determined by measuring the light transmission characteristics again, was 46% for the Ti-I-O-N film with a gradient composition of 8% for the titanium oxide coating film.
- MB methylene blue
- Titanium oxide powder (Furukawa Kikai Metal, FA-55W) with an average primary particle diameter of 0.118 m was placed at 550 ° C for 30 minutes in a gas flow of 400 sccm ammonia gas and 200 sccm argon gas. Heat treated. This treatment turned the white powder into a slightly yellowish powder.
- the inside of the particles is titanium oxide containing no nitrogen and the top surface is Ti10-N, as shown in Fig. 4 (a).
- the nitrogen composition ratio changes continuously in the radial direction of the particles.
- the decomposition characteristics of an aqueous solution of methylene ble with visible light were measured.
- the T i 0-N phase formed by the treatment of this specific example may cover the entire outermost surface of the particles or may be formed only on a part of the surface, depending on the treatment conditions. .
- the Ti-0-N photocatalyst of the present invention When the Ti-0-N photocatalyst of the present invention is used by kneading it into an organic fiber or a plastic, the Ti-10-N photocatalyst is decomposed by direct contact with the organic fiber or plastic. Problems arise. In order to solve this problem, it has been found that it is effective to carry a ceramic having lower catalytic activity on the surface of the Ti-0-N photocatalyst. However, in this case, if the entire surface of Ti-0-N is covered with ceramic, direct contact between the material to be oxidized or reduced by the photocatalytic reaction and Ti-10-N is hindered. Certain effects are reduced. Therefore, the ceramic to be supported is supported in the form of islands, needles, or meshes as shown in FIGS. 5 (a), 5 (b) and 5 (c).
- Hydrophobicity such as aromatic hydrocarbons such as benzene, toluene and xylene, and petroleum fractions such as kerosene and hexane to which alcohols such as methanol, ethanol, n-propanol, isopropanol and n-butanol are added.
- ceramics having a lower photocatalytic activity than Ti-0-N can be formed on the surface in an island shape, a needle shape, or a mesh shape.
- Other methods include Ti-ON-N powder, a thin film, or a substrate coated with Ti-ON-N, which is then sputtered, vacuum-deposited, ion-plated, CVD, etc.
- Oxides such as silicon, zirconium, magnesium, calcium, and titanium, or those containing nitrogen therein can be supported in the form of islands, needles, or meshes.
- the above-mentioned alkoxide hydrolysis method, sputtering, vacuum evaporation, ion plating, and CVD methods are used to deposit oxide ceramics such as aluminum, silicon, zirconium, magnesium, calcium, titanium, and fluororesins on the titanium oxide surface.
- oxide ceramics such as aluminum, silicon, zirconium, magnesium, calcium, titanium, and fluororesins
- Nitrogen-containing ceramics can be formed into islands, needles, or meshes.
- the quartz substrate and titanium oxide target were placed in the vacuum chamber of the sputtering system. Set to. Then, a predetermined amount of nitrogen gas and inert gas (for example, Ar gas, Ne gas) are introduced into the vacuum chamber, and sputtering is performed in the mixed gas plasma. As a result, a Ti— ⁇ —N film is deposited on the quartz substrate to a thickness of 10 m or less.
- nitrogen gas and inert gas for example, Ar gas, Ne gas
- Total gas pressure during sputtering for example 0. 52Pa, nitrogen partial pressure, but may be set in a range of 0% ⁇ N 2 partial pressure ⁇ 100%, about 20% to 60% are preferred.
- a heat treatment is performed to crystallize.
- crystallization can be performed by heat treatment at 550 ° C. for about 2 hours in a nitrogen atmosphere.
- a simple film formation has a structure in which polycrystals are mixed in amorphous.
- the heat treatment after film formation can be omitted by forming the Ti-10-N film while heating the quartz substrate at a temperature within the range of 400 to 900 ° C. The performance is inferior to that of.
- the nitrogen atom N can form a Ti10-N photocatalytic film in which a part of the oxygen site of the titanium oxide crystal is replaced.
- the ratio of the number of nitrogen atoms in the Ti-10-N film is 6.6% before heat treatment for a film formed with a nitrogen gas partial pressure of 20%, 1.4% after heat treatment, and 100% for a film formed with a nitrogen partial pressure of 100%. It was 12.7% before heat treatment and 0.5% after heat treatment.
- the ratio of the number of nitrogen atoms in the Ti 10-N film after the heat treatment was 1.4% and 1.5%, respectively.
- the state of nitrogen atoms constituting the Ti-0-N photocatalyst produced by the method of the present embodiment will be described in comparison with a conventional titanium oxide powder.
- the measurement by X-ray diffraction, but Ana evening diffraction lines over peptidase type titanium oxide and rutile type titanium oxide was observed diffraction lines derived from titanium nitride (T iN and T i 2 N) crystals observed was.
- Figure 6 shows the chemical bonding state of the nitrogen atom from the measurement result of the 1S shell of nitrogen N by XPS (X-ray Photoelectron session spectroscopy) using Mg-K and X-rays.
- the nitrogen atom in Ti-10-N of the present embodiment shows a peak derived from the Ti-N bond around 396 to 397 eV. This shows that the nitrogen atom has replaced the oxygen atom of titanium oxide.
- nitrogen atoms may be mixed in powders and films that are commercially available as titanium oxide for photocatalysts during the manufacturing process.
- the peak of these nitrogen atoms is around 400 eV as shown in Fig. 6. appear. That is, since the nitrogen atom mixed into the conventional titanium oxide forms an organic compound or a nitro group, no Ti-N bond is observed.
- the chemical properties are different from the nitrogen present in titanium oxide which is mixed in the manufacturing process or surface-modified by post-treatment.
- the results of the film thickness in this example 7 The catalytic activity was measured for 160 nm of T i 33. 9 0 64 ⁇ 7 ⁇ . 4 in .smallcircle in FIG 14 (b).
- the decomposition rate of methylene blue was changed by replacing the light source of a photocatalyst checker (manufactured by Vacuum Riko Co., Ltd.) with a visible light source having a spectrum as shown in Fig. 14 (a) and a wavelength of ⁇ 410 nm. The measurement was performed by measuring the light transmittance.
- the catalytic activity at a wavelength of ⁇ 410 nm is lower than that of the anatase-type titanium oxide produced by the same method (shown by a black diamond in FIG. 14 (b)). It can be seen that is significantly improved.
- the photocatalytic function was exhibited in all the Ti- ⁇ -N films manufactured at nitrogen gas partial pressures of 20%, 40%, 60%, and 100%.
- a film having a composition ratio of Ti 32 066 N 2 showed similar photocatalytic activity. Therefore, it was found that the nitrogen content of the Ti— ⁇ —N film is preferably set to 0 ⁇ X ⁇ 13 when the atomic ratio% is X%.
- the photocatalytic function of the Ti-0-N film after heat treatment is excellent, and the nitrogen concentration after heat treatment is more preferably 5% or less. The effect of ammonium salt observed in XPs on the outermost surface of this sample will be described. In the specific example of FIG.
- a peak derived from the Ti—N bond is observed around 397 eV.
- the case where there is a peak near 402 eV and the case where there is no peak the case where there is a peak is more active.
- This peak is considered to be a peak derived from ammonium salt, and clearly has a different binding energy from the peak derived from the prior art nitro group (—NO).
- the Ti10-N film was formed in an argon gas plasma containing nitrogen gas using a titanium oxide target.
- the film may be formed inside.
- two targets, titanium oxide and titanium nitride, or a mixture of titanium oxide and titanium nitride can be used as the target.
- Various substrates such as organic materials such as glass, ceramic, metal, and activated carbon, plate materials of silica, alumina, fluororesin, and the like, and porous materials having a honeycomb structure can be used in addition to the embodiment. is there.
- Oxide Ditan (III) (T i 2 0 3), deposited by electron beam evaporation on a glass substrate.
- nitrogen gas is introduced into the vacuum chamber so that the total pressure becomes ⁇ 0.0266 Pa (0.2 mTorr).
- the fabricated film is heat-treated in a 100% nitrogen gas atmosphere at 500 ° C for 2 hours to produce a Ti-0-N film having an ana-uniform + rutile structure.
- the vapor deposition material is not limited to the titanium oxide (III) of the present embodiment, but may be titanium oxide or metallic titanium having a different composition ratio.
- the substrate may be a plate material made of a material such as glass, ceramic, metal, organic material such as activated carbon, silica, or a honeycomb structure. Various materials such as a porous body can be used.
- the atmosphere during the vapor deposition may be a mixed atmosphere of nitrogen gas and oxygen gas.
- the processing temperature at this time may be in the temperature range of 400 ° C. to 700 ° C. Treatments at temperatures above this are not preferred as titanium nitride is formed.
- a plasma state is created in a vacuum atmosphere during vapor deposition, ion-deposited particles are ionized and activated as excited particles, an ion ion plating method, or an electron beam excited plasma is used.
- a Ti — 0—N photocatalytic film with high adhesion can be formed.
- it can also be manufactured by selecting conditions using the class-one ion beam method.
- a titanium oxide film is formed by forming the film in an oxygen atmosphere, and the film is formed at a temperature of 400 ° C. to 700 ° C. in an atmosphere containing ammonia gas or an atmosphere containing both nitrogen and hydrogen. Heat treatment in the above temperature range also provides a Ti-0-N photocatalyst.
- Titania sol is prepared by suspending ultra-fine titanium oxide in water or hydrolyzing titanium alkoxide obtained by reaction of alcohol with titanium tetrachloride or titanium metal.
- alcoholamines such as monoethanolamine diethanolamine, triethanolamine, N-methylgenolamine, N-ethyldiethanolamine, N, N-dimethyldiaminoethanol, diisopropanolamine, diethylene glycol, etc.
- glycols are added, a uniform and transparent titania sol can be obtained.
- titania sols are coated by a dropping method, a coating method, a spraying method, or the like, and are heat-treated in an atmosphere containing ammonia or nitrogen to exhibit a photocatalytic activity not only by ultraviolet light but also by irradiation with visible light.
- 0-N photocatalytic film can be manufactured.
- the processing temperature is preferably in the range of 300 ° C. to 800 ° C. More preferably, the temperature range is 450 ° C. to 700 ° C.
- a method of coating Ti-0-N on the surface of the carrier by gas treatment will be described.
- the above-mentioned titanium oxide dispersion solution is coated on the surface of the structure.
- the solution component evaporates, and as a result, Ti-0-N is formed on the surface of the honeycomb structure.
- the heat treatment temperature may be in the range of 450 ° C. or more and 700 ° C. or less.
- the reaction gas when a mixed gas of an ammonia gas and an inert gas such as an argon gas is used as the reaction gas, the condition range for forming the Ti-0-N phase of the present invention without forming titanium nitride is used. And the reproducibility of manufacturing is improved. Also, gas handling becomes easy and convenient. Further, by performing preliminary heat treatment before heat treatment in an atmosphere containing ammonia gas or nitrogen, the adhesion between the honeycomb structure and the photocatalyst particles is improved.
- an inert gas such as an argon gas
- Fig. 15 shows the light transmittance of the film-like Ti-10-N produced on a glass plate by heat treatment in a (nitrogen + argon) mixed gas flow in the same manner as for coating the above honeycomb structure. Indicates a vector. Since the visible light transmittance decreased as the treatment time was increased to 30 minutes and 60 minutes, it can be determined that the visible light absorption performance was improved by the heat treatment in an ammonia atmosphere.
- Figure 16 shows the results of XPS analysis of these films.
- a peak derived from the Ti—N bond is observed around 39 to 3997 eV. Since X-ray diffraction does not show diffraction lines originating from the titanium nitride (TiN) crystal, a part of the oxygen site of the titanium oxide crystal is replaced with a nitrogen atom by the processing of this embodiment. As a result, it can be seen that a photocatalyst in which nitrogen was contained in the titanium oxide crystal was formed.
- the composition ratio analyzed by XPS was T i T under any of the treatment conditions.
- a sol for coating Ti10-N on the surface of the honeycomb structure May be a titanium alkoxide commonly used to form a titania film.
- a solution of titanium chloride, an organic titanium compound or the like may be used.
- an aqueous solution in which hydrochloric acid and ethanol are dissolved is mixed in an ethanol solution of titanium isopropoxide. When this mixed solution is stirred at a temperature of 40 to 50 ° C., a sol is formed, which may be used.
- the Ti-0-N photocatalyst may be formed by using glass fiber, zeolite, FSM porous material, activated carbon, fiber, or the like instead of the honeycomb structure.
- the chamber Place titanium oxide particles with a particle size of about 10 nm in the chamber, and evacuate to 1.33 x 10-3 Pa (l x l O-5To rr) or less. Thereafter, nitrogen gas, for example, 0.399 Pa (3 mTorr) is introduced into the chamber, and high-frequency plasma is generated with a power supply of 200 W. By performing this high-frequency nitrogen plasma irradiation for 30 minutes, a Ti-0-N photocatalyst can be produced.
- the gas for generating plasma is not limited to nitrogen gas, and the effect is further improved by using a mixed gas of nitrogen gas and an inert gas or a mixed gas of nitrogen gas and hydrogen gas.
- the input power depends on the size of the device, and is not limited to the above values.
- the titanium oxide need not be particles but may be a thin film or fiber.
- the plasma may be low-temperature plasma such as ECR plasma or any other type of thermal plasma, or may be realized by a technique such as microwave plasma CVD. However, when plasma treatment is performed at room temperature, the photocatalytic performance is inferior.
- nitrogen ions are accelerated to an energy of 30 keV or more and 500 keV or less using an ion implantation apparatus, and the titanium ions are irradiated.
- the implantation energy is more preferably 5 OkeV or more and 40 OkeV or less. More preferably, it is not less than 10 OkeV and not more than 200 keV.
- the ion implanter used. Doping impurities in the semiconductor field
- a commercially available device used for bing can be used. However, it is preferable to select a device that can set the injection energy and the injection amount to required values.
- the amount of ions implanted into the titanium oxide is preferably from IX 10 14 ions to 1 ⁇ 10 19 ions per 1 cm 2 of irradiated area. More preferably, it is not less than 1 ⁇ 10 16 ions and not more than 1 ⁇ 10 17 ions per 1 cm 2 of irradiation area. If the amount of ions introduced is too small, the effect of absorbing light in the visible light region and exhibiting photocatalytic activity will be reduced. Conversely, if the amount is too large, the activity may be reduced, which is not preferable.
- Ti 10-N after the ion implantation is subjected to an annealing treatment.
- the annealing method is not particularly limited. Generally, it is performed using an electric furnace in air.
- the annealing temperature is usually 200 ° C or more and 700 ° C or less, preferably 300 ° C or more and 500 ° C or less.
- the annealing time is not particularly limited and is appropriately selected, but is usually 1 hour to 6 hours.
- the manufactured apparatus is the apparatus shown in Fig. 17, and is composed of an ultrafine particle generation chamber 10, a differential exhaust chamber 12, and a film formation chamber 14.
- the differential exhaust chamber 12 and the film forming chamber 14 are connected by a pipe 18 having a valve 20.
- a vacuum pump 22 is connected to the ultrafine particle generation chamber 10, the differential evacuation chamber 12, and the film formation chamber 14 via valves.
- the ultrafine particle generation chamber 10 is provided with a composite EC port 24 capable of resistance heating, so that a helium gas and a mixed gas of nitrogen and oxygen can be introduced.
- a film forming table 26 is provided in the film forming chamber 14.
- the valve 20 that flows from the differential evacuation chamber 12 to the film formation chamber 14 is opened, and the gas containing the Ti—0—N particles is passed through the He gas 2 Flow into the ultrafine particle generation chamber 10 at a flow rate of 00 ml / min.
- glass, ceramics, metal, an organic substance such as activated carbon, a plate material of a material such as silica, and a porous body having a honeycomb structure are placed on the film forming table 26, and the film forming table 26 is By moving at a predetermined speed, a gas mixed with ultrafine particles is blown, and an ultrafine particle film is formed sequentially.
- metal titanium is used as the evaporating material, but titanium nitride / titanium oxide may be used as the evaporating material.
- a method for forming the photocatalyst of the present invention into fine particles physical methods such as a metal vapor synthesis method and a fluid oil vacuum evaporation method, and a chemical method in a liquid phase such as a colloid method and an alkoxide method
- chemical methods in the gas phase such as thermal decomposition of organometallic compounds and reduction of titanium chloride, oxide, hydrated oxide, oxynitride, or nitride in a gas containing ammonia or nitrogen. It can also be manufactured by a method.
- the production method of the present invention includes a suspension in which titanium, a substance containing both titanium and a nitrogen atom, or both a substance containing titanium and a substance containing a nitrogen atom are suspended in a flammable liquid, or the above-mentioned substance is dissolved.
- the suspension is sprayed with one or both of the emulsions emulsified in a flammable liquid and the suspension or the emulsion is heated in a nitrogen atmosphere, an ammonia gas atmosphere, or a combination thereof.
- the metal examples include a metal itself and a metal salt. Accordingly, titanium chloride, complex salt and the like can be mentioned. That is, as long as it contains titanium atoms and can produce the above suspension or emulsion, it can be used as a raw material regardless of its shape. Can be Further, a titanium alkoxide may be used.
- the suspension is prepared by suspending titanium or a substance containing both titanium and nitrogen atoms, or both a substance containing titanium and a substance containing nitrogen atoms in a flammable liquid.
- Emulsion is prepared by emulsifying titanium or a substance containing both titanium and nitrogen atoms, or a solution containing both titanium-containing substances and nitrogen-containing substances in a solvent, in a flammable liquid. . Therefore, even if a substance that does not necessarily dissolve in a solvent is suspended in a flammable liquid, it can be used as a raw material for producing a photocatalyst powder.
- the substance to be suspended in the flammable liquid may be in any form such as a particle, but the finer the powder, the finer the powder.
- water is desirable as a solvent for dissolving titanium, a substance containing both titanium and a nitrogen atom, or both a substance containing titanium and a substance containing a nitrogen atom.
- the flammable liquid is a medium of the suspension or the emulsion, and includes kerosene, kerosene, gasoline, etc., and is used in one or more of them.
- the suspension or emulsion When the suspension or emulsion is prepared, it is mixed in a liquid state, so that the suspension or emulsion is homogeneous. This homogeneity does not impair the compositional uniformity during the production of the nitride, since no temperature distribution occurs during the spraying and heating of the suspension or emulsion.
- a suspension in which spheres having almost uniform diameters are dispersed can be obtained by using an appropriate emulsifier.
- the uniformity of the diameter of the dispersed sphere is reflected in the particle diameter of the photocatalyst powder obtained. It is easy to produce an emulsion having a uniform diameter of the dispersion spheres, and thus it is easy to produce an oxide powder having a uniform particle size. Further, since there is no aggregation of the spray particles, an oxide powder having a more uniform particle size can be obtained.
- the suspension or the emulsion is sprayed and the suspension or the emulsion is heated in a nitrogen atmosphere, an ammonia gas atmosphere, or a combination thereof. This burns the flammable liquid in the suspension or emulsion.
- a heating method there is a method of heating the sprayed droplets with a wrench or the like, or a method of passing the sprayed droplets through a portion heated to a flame or a high temperature.
- the atmosphere for heating either a nitrogen atmosphere or an ammonia gas atmosphere or a combination thereof is required.
- the produced photocatalyst powder is collected so as not to be scattered. In this way, a powder is produced.
- the present invention since there is no calcination or pulverization process as in the conventional case, there is no contamination of impurities and the process can be performed with few processes.
- T i N composition ratio one 0- N photocatalyst is 4. It was 5%, and then 2.1% after heat treatment at 500 ° C in the air atmosphere. Further, when heat treatment was performed at 800 ° C. in an air atmosphere, the content was 1.4%. The former two crystal phases were silver and the latter were rutile, both of which showed photocatalytic activity in the visible light region.
- T as T i C 1 4
- N source as i sources instead of to include NH 4 + ions in the solution, also T i
- a photocatalyst having an N composition ratio of 0.9% in the N photocatalyst was obtained.
- Titanium compounds such as titanyl sulfate, titanium sulfate, titanium chloride, and organic titanium compounds are added, if necessary, to the presence of crystal seeds, with the addition of ammonium salts and aqueous ammonia.
- Hydrolysis, or neutralization by adding an ammonium salt or aqueous ammonia to a titanium compound such as titanyl sulfate, titanium sulfate, titanium chloride, or an organic titanium compound, if necessary, in the presence of crystal seeds, or
- the titanium oxide suspension is treated with ammonium salt and aqueous ammonia and hydrothermally treated.
- the hydrolysis of the titanium compound is preferably performed at a temperature equal to or lower than the boiling point of the aqueous solution of the titanium compound.
- the product obtained in the above method can be used as a Ti-0-N photocatalyst. Then, the product may be separated, washed, dried or calcined. Separation can be performed by a conventional method such as filtration or a gradient method. Drying can be performed at any temperature, but a temperature of 100 to 200 ° C is appropriate. A suitable firing temperature is 200-500 ° C.
- a method of oxidizing titanium nitride or titanium oxynitride is also effective.
- oxidizing titanium nitride powder in an oxygen atmosphere will be described.
- Titanium nitride powder (manufactured by Kojundo Kagaku, average primary particle diameter 33 nm) was heat-treated in a quartz tube at 400 ° C for 90 minutes in an oxygen atmosphere. By this treatment, the powder formed a yellow sintered body. This was ground in a mortar to produce a fine yellow powder. X-ray diffraction analysis of this powder showed that the strong (110), (101), (200), (111), (210), (211), (220) And very weak T iN (200) diffraction lines were observed. (110) The average primary particle size of the rutile titanium oxide estimated from the half width of the diffraction line was 42 nm. XPS also revealed the presence of a Ti-N chemical bond in the powder.
- Fig. 18 shows the diffuse reflection spectrum of this powder.
- a curve indicated by reference numeral 111 in the figure is a reflection spectrum of the photocatalyst powder of this example, and a curve indicated by reference numeral 112 is a reflection spectrum of rutile type titanium oxide having an average primary particle diameter of 19 nm. From this result, T i0 ⁇ N of this specific example has a light absorption edge shifted to a longer wavelength side than ordinary rutile-type titanium oxide, and absorbs visible light.
- This powder was used to decompose an aqueous solution of methylene blue by irradiation with visible light.
- the powder was placed in about 5 cc of a 10 M aqueous methylene blue solution, and irradiated with visible light while stirring.
- the light source used was a 10W fluorescent tube (Matsushita Electric Works, FL 10N) fitted with an ultraviolet cut filter (Fuji Film, SC42), and the visible light was approximately ⁇ 40 Onm.
- the distance from the light source was 1 cm.
- the UV intensity was 0.0 ⁇ W / cm 2 (using a TOPCON light intensity meter, UVR-2 and UD-36). After irradiation for 48 hours, the solution was almost colorless and transparent.
- a TiO-N photocatalyst can be easily formed. Also, by selecting the processing conditions, a photocatalyst having a structure of Ti—O—N inside the powder and titanium oxide on the outermost surface can be formed.
- the treatment atmosphere may be any atmosphere such as oxygen gas, ozone, water molecules, and hydroxyl group-containing atmosphere as long as it is an oxidizing atmosphere.
- the photocatalyst of the present invention can be similarly produced by the emulsion combustion method in an oxidizing atmosphere. Also in these methods, a photocatalyst having a structure of Ti—0—N inside the powder and titanium oxide on the outermost surface can be formed by selecting the processing conditions.
- FIG. 14 (b) shows the decomposition performance of methylene blue under visible light irradiation at a wavelength ⁇ 410 nm shown in FIG. 14 (a) when the photocatalyst shown in the above specific example has a film structure.
- the measured sample showed the experimental result of the embodiment in which the shape was thin.
- the ⁇ in the figure shows the Ti—O—N film formed by sputtering in Example 7 already described
- the mouth shows the vapor-deposited film in Example 8
- the garden shows the film.
- the experimental results of the ion plating film of the concrete example 8 and the ⁇ of the titanium oxide ammonia-treated film of the specific example 10 are shown.
- the characteristics of the titanium oxide film are also shown in the figure.
- FIG. 19 shows the results when the photocatalytic thin film of Embodiment 1 was evaluated under a white fluorescent lamp. Light was irradiated from a position 15 mm away from a fluorescent tube with a luminance of 2000 cd / m 2.
- the photocatalyst of the present invention has high photocatalytic activity even under a fluorescent lamp.
- White fluorescent lamps have much lower ultraviolet content than sunlight. Therefore, the conventional titanium oxide photocatalyst could not exhibit photocatalytic performance in a general indoor living environment.
- the photocatalyst of the present invention exerts a sufficient effect even in an indoor environment.
- the Ti-0-N crystal system of the present invention is used, it is not preferable to form a titanium nitride TiN crystal inside the material.
- the N atom is formed by doping a nitrogen atom between lattices of a titanium oxide crystal or by doping a nitrogen atom at a crystal grain boundary of the titanium oxide.
- a part of the oxygen site of the titanium oxide crystal is replaced with a nitrogen atom, or a combination thereof, so that only a diffraction line of titanium oxide appears in the analysis by the X-ray diffraction method.
- the titanium oxide photocatalyst of the prior art is considered to be desirable because of its high activity of an anase type.
- the basic crystals thereof are ananaize, rutile and ruthenium. Any crystal system of brookite may be used.
- the description is made by taking the Ti-0-N photocatalyst as an example, but these manufacturing methods are not limited to Ti-10-N, and Ti-O-N In addition, this method is applied to a material system doped with at least one of S, B, C, P, C1, As, Se, Br, Sb, Te, and I.
- the photocatalyst of the present invention can also be used as a reduction catalyst. It can also be used as a catalyst for synthesizing another substance using one substance as a raw material. Industrial applicability
- the photocatalyst according to the invention operates with visible light. For this reason, antifogging and removal of organic substances can be performed by forming them on the surface of various materials placed under the condition where visible light is irradiated.
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP00949999A EP1205244B1 (en) | 1999-08-05 | 2000-08-04 | Use of a photocatalytic material |
JP2001515057A JP3498739B2 (ja) | 1999-08-05 | 2000-08-04 | 光触媒体の形成方法および光触媒物質の製造方法 |
US10/062,413 US6835688B2 (en) | 1999-08-05 | 2002-02-05 | Photocatalytic material, photocatalyst, photocatalytic article, and method for the preparation thereof |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP11/223003 | 1999-08-05 | ||
JP22300399 | 1999-08-05 | ||
JP2000/19315 | 2000-01-27 | ||
JP2000019315 | 2000-01-27 |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US10/062,413 Continuation US6835688B2 (en) | 1999-08-05 | 2002-02-05 | Photocatalytic material, photocatalyst, photocatalytic article, and method for the preparation thereof |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2001010552A1 true WO2001010552A1 (fr) | 2001-02-15 |
Family
ID=26525214
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2000/005248 WO2001010553A1 (fr) | 1999-08-05 | 2000-08-04 | Matiere catalytique et article photocatalytique |
PCT/JP2000/005247 WO2001010552A1 (fr) | 1999-08-05 | 2000-08-04 | Materiau photocatalytique, article photocatalytique et procede de preparation de ceux-ci |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2000/005248 WO2001010553A1 (fr) | 1999-08-05 | 2000-08-04 | Matiere catalytique et article photocatalytique |
Country Status (4)
Country | Link |
---|---|
US (2) | US6794065B1 (ja) |
EP (2) | EP1205244B1 (ja) |
JP (1) | JP3498739B2 (ja) |
WO (2) | WO2001010553A1 (ja) |
Cited By (29)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2001054811A1 (fr) * | 2000-01-27 | 2001-08-02 | Kabushiki Kaisha Toyota Chuo Kenkyusho | Photo-catalyseur |
JP2002095976A (ja) * | 2000-07-17 | 2002-04-02 | Toyota Central Res & Dev Lab Inc | 光触媒体 |
JP2002326815A (ja) * | 2001-04-27 | 2002-11-12 | Sumitomo Chem Co Ltd | 酸化チタンの製造方法 |
JP2002361097A (ja) * | 2001-06-12 | 2002-12-17 | Furukawa Co Ltd | 可視光励起型酸化チタン光触媒およびその製造方法 |
JP2002370026A (ja) * | 2001-06-14 | 2002-12-24 | Sumitomo Chem Co Ltd | 光触媒体およびそれを用いる光触媒機能製品 |
JP2003063912A (ja) * | 2001-08-22 | 2003-03-05 | Ulvac Japan Ltd | 抗菌・防汚材及び導電性可視光感応型酸化チタンの作製方法 |
WO2003078062A1 (fr) * | 2002-03-19 | 2003-09-25 | National Institute Of Advanced Industrial Science And Technology | Materiau composite reagissant a la lumiere visible et presentant des proprietes adsorbantes |
JPWO2002040609A1 (ja) * | 2000-11-17 | 2004-03-25 | 有限会社環境デバイス研究所 | 可視光応答性塗料、塗膜及び物品 |
JP2004130171A (ja) * | 2002-10-09 | 2004-04-30 | National Institute For Materials Science | 基体上に形成されたチタニア系結晶体からなるナノ構造体及びその製造方法 |
JP2004202329A (ja) * | 2002-12-24 | 2004-07-22 | Matsushita Electric Works Ltd | 機能性材料及びその製造方法 |
US6777091B2 (en) | 2000-03-22 | 2004-08-17 | Nippon Sheet Glass Co., Ltd. | Substrate with photocatalytic film and method for producing the same |
EP1481731A1 (en) * | 2002-02-14 | 2004-12-01 | Japan Science and Technology Agency | Photocatalyst comprising titanium fluoride nitride for water decomposition with visible light irradiation |
JP2004344724A (ja) * | 2003-05-20 | 2004-12-09 | Asahi Kasei Chemicals Corp | 光触媒組成物、それから形成される光触媒体 |
JP2005089213A (ja) * | 2003-09-16 | 2005-04-07 | Tayca Corp | 酸化チタンの製造方法 |
JP2005218956A (ja) * | 2004-02-05 | 2005-08-18 | Japan Organo Co Ltd | 光触媒含有多孔質粒状体およびその製造方法 |
JP2006021112A (ja) * | 2004-07-07 | 2006-01-26 | Kyoto Univ | 紫外及び可視光応答性チタニア系光触媒 |
JP2006055746A (ja) * | 2004-08-20 | 2006-03-02 | Tayca Corp | 広い波長領域において光触媒活性を有する酸化チタン光触媒およびその製造方法 |
WO2007037321A1 (ja) | 2005-09-29 | 2007-04-05 | Sumitomo Metal Industries, Ltd. | 酸化チタン系光触媒とその製造方法及び用途 |
JP2007167699A (ja) * | 2005-12-19 | 2007-07-05 | Toyota Central Res & Dev Lab Inc | 消臭剤 |
JP2007258735A (ja) * | 2001-07-30 | 2007-10-04 | Toshiba Corp | 半導体装置の製造方法 |
JP2008229419A (ja) * | 2007-03-16 | 2008-10-02 | Bridgestone Corp | 光触媒窒素ドープ酸化チタン薄膜及びその成膜方法 |
US7521391B2 (en) | 2004-03-17 | 2009-04-21 | Sumitomo Chemical Company, Limited | Coating composition of photocatalyst |
EP2130587A2 (en) | 2008-06-05 | 2009-12-09 | Sumitomo Chemical Company, Limited | Photocatalyst dispersion liquid and process for producing the same |
US7651675B2 (en) * | 2004-09-13 | 2010-01-26 | National Institute For Materials Science | Process for producing flaky titanium oxide capable of absorbing visible light |
EP1504816A4 (en) * | 2002-03-25 | 2010-11-24 | Osaka Titanium Technologies Co | TITANIUM OXIDE PHOTOCATALYZER, METHOD OF MANUFACTURING THEREOF AND APPLICATION |
EP2281628A2 (en) | 2009-08-07 | 2011-02-09 | Sumitomo Chemical Company, Limited | Method for producing noble metal-supported photocatalyst particles |
DE102010045549A1 (de) | 2009-09-16 | 2011-08-25 | Sumitomo Chemical Company, Limited | Photokatalysatorverbund und diesen verwendendes photokatalytisch wirksames Erzeugnis |
JP2020520304A (ja) * | 2017-05-10 | 2020-07-09 | コロロッビア コンサルティング ソチエタ レスポンサビリタ リミタータ | ナノ官能基化された担体およびその製造方法 |
CN112264075A (zh) * | 2020-11-09 | 2021-01-26 | 华侨大学 | 一种适用于中低温条件的高效脱汞光催化剂及其制备方法 |
Families Citing this family (120)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP3949374B2 (ja) | 2000-07-17 | 2007-07-25 | 住友化学株式会社 | 酸化チタン、それを用いてなる光触媒体および光触媒体コーティング剤 |
JP4107792B2 (ja) * | 2000-08-28 | 2008-06-25 | 独立行政法人科学技術振興機構 | 可視光応答性を有する金属オキシナイトライドからなる光触媒 |
JP2002355562A (ja) * | 2001-03-29 | 2002-12-10 | Ecodevice Co Ltd | 光応答性材料及びその製造方法 |
TWI240700B (en) | 2001-07-19 | 2005-10-01 | Sumitomo Chemical Co | Ceramics dispersion liquid, method for producing the same, and hydrophilic coating agent using the same |
JP2003231371A (ja) * | 2002-02-12 | 2003-08-19 | Mitsubishi Heavy Ind Ltd | 印刷用版材及び印刷用版材の再生再使用方法並びに印刷機 |
JP4374869B2 (ja) | 2002-05-27 | 2009-12-02 | 住友化学株式会社 | セラミックス分散液の製造方法 |
JP2004026553A (ja) | 2002-06-25 | 2004-01-29 | Sumitomo Chem Co Ltd | 酸化チタン分散液およびその保存容器 |
US7449245B2 (en) * | 2002-07-09 | 2008-11-11 | Leibniz-Institut Fuer Neue Materialien Gemeinnuetzige Gmbh | Substrates comprising a photocatalytic TiO2 layer |
JP3949541B2 (ja) * | 2002-08-27 | 2007-07-25 | 株式会社ジーシー | 歯牙の漂白方法及び歯牙用漂白剤 |
US7175911B2 (en) | 2002-09-18 | 2007-02-13 | Toshiba Ceramics Co., Ltd. | Titanium dioxide fine particles and method for producing the same, and method for producing visible light activatable photocatalyst |
US20040077142A1 (en) * | 2002-10-17 | 2004-04-22 | Taiwan Semiconductor Manufacturing Co., Ltd. | Atomic layer deposition and plasma treatment method for forming microelectronic capacitor structure with aluminum oxide containing dual dielectric layer |
US20040145314A1 (en) * | 2002-11-15 | 2004-07-29 | Takehiro Zukawa | Light emitting devices having a self-cleaning function, methods of manufacturing the same, and methods of manufacturing plasma display panels having a self-cleaning function |
JP2004196626A (ja) | 2002-12-20 | 2004-07-15 | Sumitomo Chem Co Ltd | 酸化チタンの製造方法 |
JP4272166B2 (ja) * | 2002-12-27 | 2009-06-03 | 富士通株式会社 | 光触媒アパタイト膜の形成方法 |
JP4584142B2 (ja) * | 2003-02-14 | 2010-11-17 | 茂夫 丸山 | 単層カーボンナノチューブ製造用触媒金属微粒子形成方法 |
JP4493282B2 (ja) * | 2003-04-28 | 2010-06-30 | 財団法人かがわ産業支援財団 | 新規な可視光励起型光触媒の製造方法 |
FR2856610B1 (fr) * | 2003-06-30 | 2005-09-30 | Nane Pehuet | Procede pour ameliorer les proprietes photocatalytiques d'un materiau photocatalyseur comportant du dioxyde de titane et materiau photocatalyseur correspondant |
US7175825B2 (en) * | 2003-12-04 | 2007-02-13 | Sundecor Co., Ltd. | Method of producing titania solution |
ATE503856T1 (de) * | 2003-12-09 | 2011-04-15 | Central Res Inst Elect | Multifunktionelles material mit einer schicht aus kohlenstoffdotiertem titanoxid |
CN1875126A (zh) * | 2003-12-09 | 2006-12-06 | 财团法人电力中央研究所 | 具有碳掺杂氧化钛层的多功能材料 |
JP4526273B2 (ja) * | 2004-01-30 | 2010-08-18 | ダイセル化学工業株式会社 | 炭素ドープ酸化チタンとその製造法、光触媒、及び該触媒を用いた有機化合物の酸化方法 |
JP4568866B2 (ja) * | 2004-02-05 | 2010-10-27 | 独立行政法人 日本原子力研究開発機構 | 可視光応答型二酸化チタン光触媒薄膜とその作製法 |
US20050202241A1 (en) | 2004-03-10 | 2005-09-15 | Jian-Ku Shang | High surface area ceramic coated fibers |
DE602004017518D1 (de) * | 2004-04-06 | 2008-12-11 | Lg Electronics Inc | Mit einem ultrahydrophilen und antibakteriellen dünnen film überzogenes metallprodukt und herstellungsverfahren dafür |
DE102004027549A1 (de) * | 2004-04-07 | 2005-10-27 | Kronos International, Inc. | Kohlenstoffhaltiger Titandioxid-Photokatalysator und Verfahren zu seiner Herstellung |
US7354624B2 (en) * | 2004-05-28 | 2008-04-08 | Ppg Industries Ohio, Inc. | Multi-layer coatings and related methods |
JP2005334796A (ja) * | 2004-05-28 | 2005-12-08 | Tohoku Univ | 可視光活性光触媒、及び可視光活性光触媒の製造方法 |
US7959980B2 (en) * | 2004-05-28 | 2011-06-14 | Ppg Industries Ohio, Inc. | Hydrophilic compositions, methods for their production, and substrates coated with such compositions |
US7354650B2 (en) * | 2004-05-28 | 2008-04-08 | Ppg Industries Ohio, Inc. | Multi-layer coatings with an inorganic oxide network containing layer and methods for their application |
US20050265917A1 (en) * | 2004-06-01 | 2005-12-01 | Wen-Chuan Liu | Method for synthesizing high adsorptive nanometer scale titanium dioxide solution |
US20050265918A1 (en) * | 2004-06-01 | 2005-12-01 | Wen-Chuan Liu | Method for manufacturing nanometer scale crystal titanium dioxide photo-catalyst sol-gel |
DE602005003228T2 (de) | 2004-07-12 | 2008-08-28 | Cardinal Cg Co., Eden Prairie | Wartungsarme beschichtungen |
WO2006033176A1 (ja) * | 2004-09-24 | 2006-03-30 | Kiichirou Sumi | 色変性した酸化チタン粉末及びその製造方法 |
US20060124442A1 (en) * | 2004-12-14 | 2006-06-15 | Valpey Richard S Iii | Device capable of removing contaminants from a fluid |
FR2879479B1 (fr) * | 2004-12-17 | 2007-11-09 | Armines Ass Loi De 1901 | Structures composites en etat amorphe pour la photocatalyse |
US7491349B2 (en) * | 2004-12-28 | 2009-02-17 | Ishihara Sangyo Kaisha, Ltd. | Black titanium oxynitride |
WO2006070794A1 (ja) * | 2004-12-28 | 2006-07-06 | Dai Nippon Printing Co., Ltd. | 表示素子用黒色樹脂組成物、及び表示素子用部材 |
JP2006186228A (ja) * | 2004-12-28 | 2006-07-13 | Toyoda Gosei Co Ltd | 半導体レーザダイオード |
TW200631660A (en) * | 2005-01-18 | 2006-09-16 | Nippon Catalytic Chem Ind | Visible light responsive photocatalyst composition and method for manufacturing the same |
DE602006012798D1 (de) * | 2005-01-21 | 2010-04-22 | Commw Scient Ind Res Org | Aktivierungsverfahren mithilfe eines modifikationsmittels |
JP4789085B2 (ja) * | 2005-02-07 | 2011-10-05 | 独立行政法人日本原子力研究開発機構 | 結晶配向した硫黄添加二酸化チタン膜の作製法 |
US7718270B2 (en) * | 2005-02-24 | 2010-05-18 | Central Research Institute Of Electric Power Industry | Multifunctional material |
JP4597713B2 (ja) * | 2005-02-28 | 2010-12-15 | 財団法人電力中央研究所 | 金属製容器 |
JP4756574B2 (ja) * | 2005-02-28 | 2011-08-24 | 財団法人電力中央研究所 | 空調機 |
JP4480014B2 (ja) * | 2005-02-28 | 2010-06-16 | 財団法人電力中央研究所 | ロケット部品 |
JP4716309B2 (ja) * | 2005-02-28 | 2011-07-06 | 財団法人電力中央研究所 | 熱交換器 |
JP4541929B2 (ja) * | 2005-02-28 | 2010-09-08 | 財団法人電力中央研究所 | 飛行体 |
JP4662128B2 (ja) * | 2005-02-28 | 2011-03-30 | 財団法人電力中央研究所 | 空気清浄装置乃至空気清浄システム |
US20060210798A1 (en) * | 2005-03-16 | 2006-09-21 | Clemens Burda | Doped metal oxide nanoparticles and methods for making and using same |
GR1005642B (el) * | 2005-03-18 | 2007-09-18 | Χρηστος Τραπαλης | ΑΝΑΠΤΥΞΗ ΝΑΝΟ-ΚΡΥΣΤΑΛΛΙΚΟΥ TiO2 ΕΝΕΡΓΟΥ ΣΤΟ ΟΡΑΤΟΦΩΣ ΓΙΑ ΠΕΡΙΒΑΛΛΟΝΤΙΚΕΣ ΕΦΑΡΜΟΓΕΣ. |
KR100620076B1 (ko) * | 2005-04-27 | 2006-09-06 | 한국과학기술연구원 | C와 n으로 도핑된 박막형 이산화티탄계 광촉매 및 자성물질과 그 제조 방법 |
EP1928814A2 (en) * | 2005-08-23 | 2008-06-11 | Altairnano, Inc | HIGHLY PHOTOCATALYTIC PHOSPHORUS-DOPED ANATASE-TiO2 COMPOSITION AND RELATED MANUFACTURING METHODS |
US8821831B2 (en) * | 2005-08-25 | 2014-09-02 | Showa Co., Ltd. | Process for producing crystalline titanium oxide coating film through electrolytic anodizing |
US8631583B2 (en) | 2005-10-31 | 2014-01-21 | Dennis Moss | Bagel slicer |
US20080127497A1 (en) * | 2005-10-31 | 2008-06-05 | Dennis Moss | Blade assembly |
US7651559B2 (en) | 2005-11-04 | 2010-01-26 | Franklin Industrial Minerals | Mineral composition |
US7901660B2 (en) * | 2005-12-29 | 2011-03-08 | The Board Of Trustees Of The University Of Illinois | Quaternary oxides and catalysts containing quaternary oxides |
KR100993457B1 (ko) * | 2006-03-30 | 2010-11-09 | 오사카 티타늄 테크놀로지스 캄파니 리미티드 | 가시광 응답형 산화티탄 광촉매와 그 제조 방법 및 용도 |
KR101431230B1 (ko) | 2006-04-11 | 2014-08-18 | 카디날 씨지 컴퍼니 | 개선된 낮은 유지 특성이 있는 광촉매성 코팅 |
US8123837B2 (en) * | 2006-05-15 | 2012-02-28 | Carrier Corporation | Siloxane resistant ultra violet photocatalysts |
US20080011599A1 (en) | 2006-07-12 | 2008-01-17 | Brabender Dennis M | Sputtering apparatus including novel target mounting and/or control |
CN101778668A (zh) * | 2007-07-31 | 2010-07-14 | 开利公司 | 用于光催化装置寿命延长的通过形成硅酸盐的硅氧烷除去 |
WO2009021524A1 (en) * | 2007-08-14 | 2009-02-19 | Scf Technologies A/S | Method and compositions for producing optically clear photocatalytic coatings |
US8551906B2 (en) * | 2007-08-16 | 2013-10-08 | The University Of Queensland | Titanate photocatalyst |
US7820296B2 (en) * | 2007-09-14 | 2010-10-26 | Cardinal Cg Company | Low-maintenance coating technology |
WO2009052510A2 (en) * | 2007-10-19 | 2009-04-23 | Worthington Technologies, Llc | Method of surface modifying titania using metal and compositions therefrom |
CZ301315B6 (cs) | 2008-02-21 | 2010-01-13 | Advanced Materials - Jtj S. R. O. | Katalytická struktura TiO2 pro katalytické procesy do 1000 °C a zpusob její výroby |
GB0804365D0 (en) * | 2008-03-10 | 2008-04-16 | Dublin Inst Of Technology | Synthesis of nanoporous semi-conducting oxides |
WO2009133525A2 (en) * | 2008-04-29 | 2009-11-05 | High Tech Laser | Composition for dental bleaching |
US20110104013A1 (en) * | 2008-05-27 | 2011-05-05 | Florida Gulf Coast University | Method for producing photocatalytic materials and materials and apparatus therewith |
US9120088B2 (en) | 2008-05-29 | 2015-09-01 | The Board Of Trustees Of The University Of Illinois | Heavily doped metal oxides and methods for making the same |
CN101591745A (zh) * | 2008-05-30 | 2009-12-02 | 鸿富锦精密工业(深圳)有限公司 | 铝制品及其制作方法 |
DE202008009873U1 (de) | 2008-07-22 | 2008-10-02 | Kettenbach Gmbh & Co. Kg | Dentale Bleichmittelzusammensetzung und Dentallack |
DE102009017409A1 (de) | 2008-10-04 | 2010-04-08 | Friedrich-Alexander-Universität Erlangen-Nürnberg | Azin-modifizierter Titandioxid-Photokatalysator und Verfahren zu seiner Herstellung |
JP5498009B2 (ja) | 2008-10-30 | 2014-05-21 | 国立大学法人 東京大学 | 光触媒材料、有機物分解方法、内装部材、空気清浄装置、酸化剤製造装置 |
US20100213046A1 (en) * | 2009-01-06 | 2010-08-26 | The Penn State Research Foundation | Titania nanotube arrays, methods of manufacture, and photocatalytic conversion of carbon dioxide using same |
US20100193449A1 (en) * | 2009-02-02 | 2010-08-05 | Jian-Ku Shang | Materials and methods for removing arsenic from water |
CN102301495B (zh) * | 2009-02-04 | 2014-03-19 | 英派尔科技开发有限公司 | 可变聚光透镜装置和太阳能电池装置 |
WO2010140700A1 (ja) * | 2009-06-01 | 2010-12-09 | 新日本製鐵株式会社 | 可視光応答性を有し、光触媒活性に優れたチタン系材料およびその製造方法 |
DE102009026712A1 (de) | 2009-06-04 | 2010-12-09 | BSH Bosch und Siemens Hausgeräte GmbH | Hausgerät mit einer Oberfläche, welche einen Photokatalysator aufweist |
DE102010030046A1 (de) | 2009-07-17 | 2011-02-03 | BSH Bosch und Siemens Hausgeräte GmbH | Satz und Verfahren zum photokatalytischen Behandeln eines Wäschepostens und Einrichtung zum Herstellen des Satzes |
JP4831634B2 (ja) * | 2009-09-02 | 2011-12-07 | 財団法人電力中央研究所 | 有機物分解システム |
US8946112B2 (en) | 2009-10-30 | 2015-02-03 | Empire Technology Development Llc | Photocatalytic material for splitting oxides of carbon |
TWI482292B (zh) * | 2009-11-24 | 2015-04-21 | Ind Tech Res Inst | 量子點染料敏化太陽電池 |
USPP21976P2 (en) | 2009-12-16 | 2011-06-14 | Spring Meadow Nursery, Inc. | Spiraea plant named ‘Zelda’ |
EP2213947A3 (de) | 2010-01-28 | 2010-10-06 | V-Zug AG | Haushaltgerät mit Photokatalysator |
WO2012007534A2 (en) * | 2010-07-13 | 2012-01-19 | Theta Chemicals Limited | A doped material |
EP2407236A1 (en) * | 2010-07-13 | 2012-01-18 | Theta Chemicals Limited | Photocatalyst comprising a doped material |
CN102345093B (zh) * | 2010-07-29 | 2016-01-13 | 鸿富锦精密工业(深圳)有限公司 | 壳体及其制作方法 |
US8585979B2 (en) | 2010-09-07 | 2013-11-19 | Puradigm, Llc | Enhanced photo-catalytic cells |
US8585980B2 (en) | 2010-09-07 | 2013-11-19 | Puradigm, Llc | Enhanced photo-catalytic cells |
KR101430285B1 (ko) * | 2010-10-28 | 2014-08-13 | 울산대학교 산학협력단 | TiON 광촉매의 제조방법 |
EP2330247B1 (de) | 2011-03-08 | 2013-03-27 | V-Zug AG | Wäschetrockner, insbesondere Schranktrockner |
US20120282471A1 (en) * | 2011-05-05 | 2012-11-08 | Certain Teed Corporation | Roofing granules including base particles and a coating |
US9631367B2 (en) | 2011-08-05 | 2017-04-25 | Certainteed Corporation | System, method and apparatus for increasing surface solar reflectance of roofing |
CA2783921A1 (en) | 2011-08-05 | 2013-02-05 | Certainteed Corporation | System, method and apparatus for increasing surface solar reflectance of roofing |
JP2013245133A (ja) * | 2012-05-25 | 2013-12-09 | National Institute For Materials Science | チタン酸化物とそれを用いた黄色顔料及び光触媒 |
CN102730755B (zh) * | 2012-07-06 | 2014-05-14 | 苏州大学 | 一种棒状N、Ag 共掺杂TiO2及其制备方法 |
KR102093443B1 (ko) | 2012-11-29 | 2020-03-25 | 삼성전자주식회사 | 전기 흡착 탈이온 장치 및 이를 사용한 유체 처리 방법 |
EP2759632A1 (de) | 2013-01-29 | 2014-07-30 | V-Zug AG | Wäschebehandlungsschrank |
DK2759633T3 (en) | 2013-01-29 | 2016-02-01 | V Zug Ag | Household appliance with catalytic cleaning |
KR102092941B1 (ko) | 2013-06-12 | 2020-03-24 | 삼성전자주식회사 | 전기 흡착 탈이온 장치 및 이를 사용한 유체 처리 방법 |
CN104248967B (zh) * | 2014-06-17 | 2017-08-11 | 扬州大学 | 一种气相法多孔载体负载氮掺杂二氧化钛的制备方法 |
CN104549405B (zh) * | 2014-12-11 | 2017-01-25 | 河北工业大学 | 一种钨和氮共掺杂的钽酸钠及其制备方法 |
JP6555806B2 (ja) * | 2015-07-03 | 2019-08-07 | 昭和電工株式会社 | 酸素還元触媒の評価方法および選択方法並びに酸素還元触媒 |
EP3341120A1 (en) * | 2015-08-28 | 2018-07-04 | SABIC Global Technologies B.V. | Hydrogen production using hybrid photonic-electronic materials |
CN105126858A (zh) * | 2015-09-09 | 2015-12-09 | 杭州崔特环保技术有限公司 | 一种磁性纳米钕铁钛氧化物臭氧催化剂及其制备方法和应用 |
CN105562039B (zh) * | 2016-01-31 | 2018-09-25 | 苏州大学 | 一种碲酸钛光催化剂、制备方法及其应用 |
US20170225206A1 (en) * | 2016-02-10 | 2017-08-10 | Andrew Deitchman | Systems and methods for cleaning a mobile device |
US10604442B2 (en) | 2016-11-17 | 2020-03-31 | Cardinal Cg Company | Static-dissipative coating technology |
US10544619B2 (en) * | 2017-02-13 | 2020-01-28 | Hall Labs Llc | Self-cleaning window blinds with photocatalytic material |
CZ2017253A3 (cs) * | 2017-05-04 | 2019-01-09 | TESORO Spin off, s.r.o. | Způsob přípravy katalyzátorů na bázi sloučenin titanu |
US11577224B2 (en) * | 2018-05-01 | 2023-02-14 | Hamilton Sundstrand Corporation | Gas treatment method and materials |
JP7305996B2 (ja) * | 2019-03-15 | 2023-07-11 | 富士フイルムビジネスイノベーション株式会社 | 水質浄化粒子、水耕栽培装置、および水質浄化装置 |
IT201900015677A1 (it) * | 2019-09-05 | 2021-03-05 | Italcer S P A | Ceramica fotocatalitica |
CN110560138A (zh) * | 2019-09-27 | 2019-12-13 | 南昌航空大学 | 一种具有高光催化性能的n/f共掺杂二氧化钛光催化剂的制备方法 |
EP4326822A1 (en) * | 2021-04-23 | 2024-02-28 | CoolSeal LLC | Colored titanium dioxide asphalt compositions |
CN113463127B (zh) * | 2021-06-21 | 2022-06-10 | 深圳技术大学 | 金刚石基光电催化电极及其制备方法和光电催化装置 |
TWI826945B (zh) * | 2022-03-04 | 2023-12-21 | 中原大學 | 用以製備光觸媒的方法及該光觸媒於降解nox的用途 |
CN114602526A (zh) * | 2022-03-30 | 2022-06-10 | 中国科学技术大学先进技术研究院 | 一种氮化钛包覆二氧化钛纳米材料的制备方法 |
Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4948631A (en) | 1988-03-11 | 1990-08-14 | Basf Aktiengesellschaft | Preparation of particularly bluish pearl luster pigments |
WO1991002103A1 (en) | 1989-08-07 | 1991-02-21 | The Boc Group, Inc. | Method of depositing optical oxide coatings at enhanced rates |
US5367285A (en) | 1993-02-26 | 1994-11-22 | Lake Shore Cryotronics, Inc. | Metal oxy-nitride resistance films and methods of making the same |
JPH08134630A (ja) * | 1994-11-14 | 1996-05-28 | Agency Of Ind Science & Technol | 光触媒用酸化チタン含有膜被覆基体及びその製造方法 |
JP2865065B2 (ja) | 1995-06-14 | 1999-03-08 | 東陶機器株式会社 | 親水性表面を備えた複合材 |
JP2917525B2 (ja) | 1995-12-22 | 1999-07-12 | 東陶機器株式会社 | 表面を光触媒的に親水化する方法、および、光触媒性親水性表面を備えた複合材 |
JP2000140636A (ja) * | 1998-11-10 | 2000-05-23 | Sharp Corp | 光触媒体の形成方法 |
Family Cites Families (31)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
ES373808A1 (es) * | 1969-11-22 | 1972-02-16 | Dow Unquinesa S A | Procedimiento para la produccion de un pigmento de bioxido de titanio con resistencia superior a la foto-reduccion. |
US4684537A (en) | 1984-04-30 | 1987-08-04 | R. E. Stiftung | Process for the sensitization of an oxidation/reduction photocatalyst, and photocatalyst thus obtained |
JPS6142333A (ja) | 1984-08-03 | 1986-02-28 | Agency Of Ind Science & Technol | 光触媒活性を有するチタン化合物 |
JP2612884B2 (ja) * | 1988-02-24 | 1997-05-21 | 三菱マテリアル株式会社 | 酸窒化チタン繊維とその製造法 |
JP3347467B2 (ja) | 1993-04-21 | 2002-11-20 | 旭硝子株式会社 | 着色薄膜形成用塗布液、着色薄膜とその製造方法、およびガラス物品 |
US5670248A (en) | 1994-07-15 | 1997-09-23 | Lazarov; Miladin P. | Material consisting of chemical compounds, comprising a metal from group IV A of the periodic system, nitrogen and oxygen, and process for its preparation |
US5698177A (en) * | 1994-08-31 | 1997-12-16 | University Of Cincinnati | Process for producing ceramic powders, especially titanium dioxide useful as a photocatalyst |
US5670247A (en) * | 1994-10-03 | 1997-09-23 | Mitsubishi Paper Mills Limited | Photoreactive noxious substance purging agent and photoreactive noxious substance purging material using the agent |
JP3381886B2 (ja) * | 1995-07-10 | 2003-03-04 | 日本曹達株式会社 | 光触媒構造体及びその製造方法 |
US5597515A (en) * | 1995-09-27 | 1997-01-28 | Kerr-Mcgee Corporation | Conductive, powdered fluorine-doped titanium dioxide and method of preparation |
WO1997015526A1 (en) * | 1995-10-27 | 1997-05-01 | E.I. Du Pont De Nemours And Company | Hydrothermal process for making ultrafine metal oxide powders |
JP3844823B2 (ja) | 1996-01-22 | 2006-11-15 | 財団法人石油産業活性化センター | 光触媒、光触媒の製造方法および光触媒反応方法 |
JPH11504615A (ja) * | 1996-03-07 | 1999-04-27 | サン−ゴバン ビトラージュ | ガラス上に反射層を被着する方法及び得られる製品 |
FR2752235B3 (fr) * | 1996-08-07 | 1998-08-28 | Saint Gobain Vitrage | Substrat verrier muni d'une couche reflechissante |
US6074981A (en) * | 1996-08-05 | 2000-06-13 | Nippon Sheet Glass Co., Ltd. | Photocatalyst and process for the preparation thereof |
US6344271B1 (en) * | 1998-11-06 | 2002-02-05 | Nanoenergy Corporation | Materials and products using nanostructured non-stoichiometric substances |
JP3455653B2 (ja) * | 1996-09-24 | 2003-10-14 | 恒成株式会社 | 二酸化チタン結晶配向膜を有する材料及びその製造方法 |
AU4967197A (en) * | 1996-11-25 | 1998-06-22 | Ecodevice Laboratory Co., Ltd. | Photocatalyst having visible light activity and uses thereof |
JPH10305230A (ja) * | 1997-03-07 | 1998-11-17 | Sumitomo Metal Ind Ltd | 光触媒とその製造方法および有害物質の分解・除去方法 |
EP0924164A3 (en) * | 1997-12-18 | 2000-01-05 | Hoya Corporation | Methods for producing oxides or composites thereof |
JPH11180736A (ja) * | 1997-12-18 | 1999-07-06 | Central Glass Co Ltd | 多層膜付きガラス |
JP3493393B2 (ja) | 1997-12-25 | 2004-02-03 | 独立行政法人産業技術総合研究所 | 環境浄化用光触媒粉体、該粉体含有重合体組成物およびその成形品、ならびにそれらの製造方法 |
US6154311A (en) * | 1998-04-20 | 2000-11-28 | Simtek Hardcoatings, Inc. | UV reflective photocatalytic dielectric combiner having indices of refraction greater than 2.0 |
JPH11333304A (ja) * | 1998-05-22 | 1999-12-07 | Kankyo Device Kenkyusho:Kk | 光触媒及びその利用 |
JP2000070709A (ja) | 1998-08-31 | 2000-03-07 | Kosei Kk | 二酸化チタン結晶配向膜を有する材料 |
JP2000103621A (ja) | 1998-09-28 | 2000-04-11 | Nok Corp | 酸化チタン膜形成用加水分解ゾルおよび光触媒構造体 |
US6036763A (en) * | 1998-10-16 | 2000-03-14 | Engelhard Corporation | KOH neutralized metatitanic acid mixture and complex inorganic pigments containing the same |
JP3043321B1 (ja) * | 1998-11-11 | 2000-05-22 | 株式会社日本アルミ | 酸化チタン微粒子の製造方法 |
JP3959213B2 (ja) * | 1999-06-30 | 2007-08-15 | 住友化学株式会社 | 酸化チタン、それを用いてなる光触媒体及び光触媒体コーティング剤 |
JP2001354422A (ja) * | 2000-06-13 | 2001-12-25 | Sumitomo Chem Co Ltd | 酸化チタンの製造方法 |
JP2001347162A (ja) * | 2000-06-07 | 2001-12-18 | Sharp Corp | 酸化チタン薄膜を有する光触媒材 |
-
2000
- 2000-08-04 EP EP00949999A patent/EP1205244B1/en not_active Expired - Lifetime
- 2000-08-04 WO PCT/JP2000/005248 patent/WO2001010553A1/ja active Application Filing
- 2000-08-04 WO PCT/JP2000/005247 patent/WO2001010552A1/ja active Application Filing
- 2000-08-04 EP EP00951885A patent/EP1205245A4/en not_active Withdrawn
- 2000-08-04 JP JP2001515057A patent/JP3498739B2/ja not_active Expired - Lifetime
- 2000-08-04 US US10/048,933 patent/US6794065B1/en not_active Expired - Lifetime
-
2002
- 2002-02-05 US US10/062,413 patent/US6835688B2/en not_active Expired - Lifetime
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4948631A (en) | 1988-03-11 | 1990-08-14 | Basf Aktiengesellschaft | Preparation of particularly bluish pearl luster pigments |
WO1991002103A1 (en) | 1989-08-07 | 1991-02-21 | The Boc Group, Inc. | Method of depositing optical oxide coatings at enhanced rates |
US5367285A (en) | 1993-02-26 | 1994-11-22 | Lake Shore Cryotronics, Inc. | Metal oxy-nitride resistance films and methods of making the same |
JPH08134630A (ja) * | 1994-11-14 | 1996-05-28 | Agency Of Ind Science & Technol | 光触媒用酸化チタン含有膜被覆基体及びその製造方法 |
JP2865065B2 (ja) | 1995-06-14 | 1999-03-08 | 東陶機器株式会社 | 親水性表面を備えた複合材 |
JP2917525B2 (ja) | 1995-12-22 | 1999-07-12 | 東陶機器株式会社 | 表面を光触媒的に親水化する方法、および、光触媒性親水性表面を備えた複合材 |
JP2000140636A (ja) * | 1998-11-10 | 2000-05-23 | Sharp Corp | 光触媒体の形成方法 |
Non-Patent Citations (4)
Title |
---|
D.H. LEE ET AL., APPLIED PHYSICS LETTERS, vol. 66, no. 7, 1995, pages 815 - 816 |
N.C. SAHA ET AL., APPL. PHYS., vol. 72, no. 7, 1992, pages 3072 - 3079 |
S. SATO, CHEMICAL PHYSICS LETTERS, vol. 123, no. 1-2, 1986, pages 126 - 128 |
See also references of EP1205244A4 |
Cited By (40)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2001054811A1 (fr) * | 2000-01-27 | 2001-08-02 | Kabushiki Kaisha Toyota Chuo Kenkyusho | Photo-catalyseur |
US6743749B2 (en) | 2000-01-27 | 2004-06-01 | Kabushiki Kaisha Toyota Chuo Kenkyusho | Photocatalyst |
US6777091B2 (en) | 2000-03-22 | 2004-08-17 | Nippon Sheet Glass Co., Ltd. | Substrate with photocatalytic film and method for producing the same |
JP2002095976A (ja) * | 2000-07-17 | 2002-04-02 | Toyota Central Res & Dev Lab Inc | 光触媒体 |
US6680277B2 (en) | 2000-07-17 | 2004-01-20 | Kabushiki Kaisha Toyota Chuo Kenkyusho | Photocatalytic susbstance |
JP4626099B2 (ja) * | 2000-07-17 | 2011-02-02 | 株式会社豊田中央研究所 | 光触媒体 |
JPWO2002040609A1 (ja) * | 2000-11-17 | 2004-03-25 | 有限会社環境デバイス研究所 | 可視光応答性塗料、塗膜及び物品 |
JP2002326815A (ja) * | 2001-04-27 | 2002-11-12 | Sumitomo Chem Co Ltd | 酸化チタンの製造方法 |
JP2002361097A (ja) * | 2001-06-12 | 2002-12-17 | Furukawa Co Ltd | 可視光励起型酸化チタン光触媒およびその製造方法 |
JP2002370026A (ja) * | 2001-06-14 | 2002-12-24 | Sumitomo Chem Co Ltd | 光触媒体およびそれを用いる光触媒機能製品 |
JP2007258735A (ja) * | 2001-07-30 | 2007-10-04 | Toshiba Corp | 半導体装置の製造方法 |
JP2003063912A (ja) * | 2001-08-22 | 2003-03-05 | Ulvac Japan Ltd | 抗菌・防汚材及び導電性可視光感応型酸化チタンの作製方法 |
EP1481731A1 (en) * | 2002-02-14 | 2004-12-01 | Japan Science and Technology Agency | Photocatalyst comprising titanium fluoride nitride for water decomposition with visible light irradiation |
EP1481731A4 (en) * | 2002-02-14 | 2007-06-06 | Japan Science & Tech Agency | PHOTOCATALYZER WITH TITANIUM FLUORIDE NITRIDE FOR THE DECOMPOSITION OF WATER BY IRRADIATION WITH VISIBLE LIGHT |
WO2003078062A1 (fr) * | 2002-03-19 | 2003-09-25 | National Institute Of Advanced Industrial Science And Technology | Materiau composite reagissant a la lumiere visible et presentant des proprietes adsorbantes |
EP1504816A4 (en) * | 2002-03-25 | 2010-11-24 | Osaka Titanium Technologies Co | TITANIUM OXIDE PHOTOCATALYZER, METHOD OF MANUFACTURING THEREOF AND APPLICATION |
JP2004130171A (ja) * | 2002-10-09 | 2004-04-30 | National Institute For Materials Science | 基体上に形成されたチタニア系結晶体からなるナノ構造体及びその製造方法 |
JP2004202329A (ja) * | 2002-12-24 | 2004-07-22 | Matsushita Electric Works Ltd | 機能性材料及びその製造方法 |
JP2004344724A (ja) * | 2003-05-20 | 2004-12-09 | Asahi Kasei Chemicals Corp | 光触媒組成物、それから形成される光触媒体 |
JP2005089213A (ja) * | 2003-09-16 | 2005-04-07 | Tayca Corp | 酸化チタンの製造方法 |
JP4484195B2 (ja) * | 2003-09-16 | 2010-06-16 | テイカ株式会社 | 酸化チタンの製造方法 |
JP2005218956A (ja) * | 2004-02-05 | 2005-08-18 | Japan Organo Co Ltd | 光触媒含有多孔質粒状体およびその製造方法 |
US7521391B2 (en) | 2004-03-17 | 2009-04-21 | Sumitomo Chemical Company, Limited | Coating composition of photocatalyst |
JP4576526B2 (ja) * | 2004-07-07 | 2010-11-10 | 国立大学法人京都大学 | 紫外及び可視光応答性チタニア系光触媒 |
JP2006021112A (ja) * | 2004-07-07 | 2006-01-26 | Kyoto Univ | 紫外及び可視光応答性チタニア系光触媒 |
US7153808B2 (en) | 2004-07-07 | 2006-12-26 | Kyoto University | Ultraviolet and visible-light-sensitive titania-based photocatalyst |
JP4580197B2 (ja) * | 2004-08-20 | 2010-11-10 | テイカ株式会社 | 広い波長領域において光触媒活性を有する酸化チタン光触媒およびその製造方法 |
JP2006055746A (ja) * | 2004-08-20 | 2006-03-02 | Tayca Corp | 広い波長領域において光触媒活性を有する酸化チタン光触媒およびその製造方法 |
US7651675B2 (en) * | 2004-09-13 | 2010-01-26 | National Institute For Materials Science | Process for producing flaky titanium oxide capable of absorbing visible light |
US7858201B2 (en) | 2005-09-29 | 2010-12-28 | Sumitomo Metal Industries, Ltd. | Titanium oxide photocatalyst, method for producing same and use thereof |
WO2007037321A1 (ja) | 2005-09-29 | 2007-04-05 | Sumitomo Metal Industries, Ltd. | 酸化チタン系光触媒とその製造方法及び用途 |
JP2007167699A (ja) * | 2005-12-19 | 2007-07-05 | Toyota Central Res & Dev Lab Inc | 消臭剤 |
JP2008229419A (ja) * | 2007-03-16 | 2008-10-02 | Bridgestone Corp | 光触媒窒素ドープ酸化チタン薄膜及びその成膜方法 |
EP2130587A2 (en) | 2008-06-05 | 2009-12-09 | Sumitomo Chemical Company, Limited | Photocatalyst dispersion liquid and process for producing the same |
EP2281628A2 (en) | 2009-08-07 | 2011-02-09 | Sumitomo Chemical Company, Limited | Method for producing noble metal-supported photocatalyst particles |
DE102010045549A1 (de) | 2009-09-16 | 2011-08-25 | Sumitomo Chemical Company, Limited | Photokatalysatorverbund und diesen verwendendes photokatalytisch wirksames Erzeugnis |
JP2020520304A (ja) * | 2017-05-10 | 2020-07-09 | コロロッビア コンサルティング ソチエタ レスポンサビリタ リミタータ | ナノ官能基化された担体およびその製造方法 |
JP7348168B2 (ja) | 2017-05-10 | 2023-09-20 | コロロッビア コンサルティング ソチエタ レスポンサビリタ リミタータ | ナノ官能基化された担体およびその製造方法 |
CN112264075A (zh) * | 2020-11-09 | 2021-01-26 | 华侨大学 | 一种适用于中低温条件的高效脱汞光催化剂及其制备方法 |
CN112264075B (zh) * | 2020-11-09 | 2022-08-26 | 华侨大学 | 一种适用于中低温条件的高效脱汞光催化剂及其制备方法 |
Also Published As
Publication number | Publication date |
---|---|
EP1205244B1 (en) | 2012-05-02 |
US6835688B2 (en) | 2004-12-28 |
US20020169076A1 (en) | 2002-11-14 |
US6794065B1 (en) | 2004-09-21 |
EP1205245A1 (en) | 2002-05-15 |
JP3498739B2 (ja) | 2004-02-16 |
EP1205244A1 (en) | 2002-05-15 |
EP1205244A4 (en) | 2005-01-19 |
WO2001010553A1 (fr) | 2001-02-15 |
EP1205245A4 (en) | 2005-01-19 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
WO2001010552A1 (fr) | Materiau photocatalytique, article photocatalytique et procede de preparation de ceux-ci | |
JP3601532B2 (ja) | 光触媒物質、光触媒体およびこれらの製造方法 | |
Zaleska | Doped-TiO2: a review | |
JP5157561B2 (ja) | 可視光応答型光触媒とその製造方法 | |
TWI317650B (ja) | ||
Asahi et al. | Nitrogen-doped titanium dioxide as visible-light-sensitive photocatalyst: designs, developments, and prospects | |
WO2009116181A1 (ja) | 可視光応答型光触媒とその製造方法 | |
KR100701735B1 (ko) | 적외선 차폐재료 미립자 분산체, 적외선 차폐체, 및 적외선차폐재료 미립자의 제조방법, 및 적외선 차폐재료 미립자 | |
KR100417610B1 (ko) | 가시광선 응답형 광촉매 | |
Omri et al. | Effects of ZnO/Mn concentration on the micro-structure and optical properties of ZnO/Mn–TiO 2 nano-composite for applications in photo-catalysis | |
WO2010055570A1 (ja) | 赤外線遮蔽微粒子及びその製造方法、並びにそれを用いた赤外線遮蔽微粒子分散体、赤外線遮蔽基材 | |
AU2001282711A1 (en) | Titanium-containing materials | |
JP3894144B2 (ja) | 酸化チタン系光触媒とその製造方法および応用 | |
WO2005014170A1 (ja) | 可視光活性を有する光触媒体、その原料及びその製造方法 | |
Nakakura et al. | Cationic defect engineering for controlling the infrared absorption of hexagonal cesium tungsten bronze nanoparticles | |
KR101804327B1 (ko) | 이산화티탄을 이용한 혼성 광촉매 필름 및 제조 방법 | |
JP2011063739A (ja) | 近赤外線遮蔽材料微粒子とその製造方法および近赤外線遮蔽材料微粒子分散体と近赤外線遮蔽体 | |
Cheng et al. | Visible-light responsive zinc ferrite doped titania photocatalyst for methyl orange degradation | |
Park et al. | Superhydrophilic transparent titania films by supersonic aerosol deposition | |
JP2001207082A (ja) | 親水性材料 | |
Saroj et al. | Photodegradation of Direct Blue‐199 in carpet industry wastewater using iron‐doped TiO2 nanoparticles and regenerated photocatalyst | |
JP2000096212A (ja) | 光触媒膜被覆部材およびその製造方法 | |
JP2011063493A (ja) | 近赤外線遮蔽材料微粒子分散体および近赤外線遮蔽体および近赤外線遮蔽材料分散体の製造方法 | |
JP2011079713A (ja) | 銅イオン修飾酸化チタン及びその製造方法、並びに光触媒 | |
CN110314677B (zh) | 直接溶液氧化法制备不同Sn掺杂量的TiO2纳米粉体及其应用 |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
AK | Designated states |
Kind code of ref document: A1 Designated state(s): JP US |
|
AL | Designated countries for regional patents |
Kind code of ref document: A1 Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LU MC NL PT SE |
|
121 | Ep: the epo has been informed by wipo that ep was designated in this application | ||
DFPE | Request for preliminary examination filed prior to expiration of 19th month from priority date (pct application filed before 20040101) | ||
WWE | Wipo information: entry into national phase |
Ref document number: 2000949999 Country of ref document: EP Ref document number: 10062413 Country of ref document: US |
|
WWP | Wipo information: published in national office |
Ref document number: 2000949999 Country of ref document: EP |