WO2009087951A1 - 酸化チタンおよびその製造方法 - Google Patents
酸化チタンおよびその製造方法 Download PDFInfo
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- WO2009087951A1 WO2009087951A1 PCT/JP2008/073957 JP2008073957W WO2009087951A1 WO 2009087951 A1 WO2009087951 A1 WO 2009087951A1 JP 2008073957 W JP2008073957 W JP 2008073957W WO 2009087951 A1 WO2009087951 A1 WO 2009087951A1
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- WIPO (PCT)
- Prior art keywords
- titanium oxide
- anatase
- titanium
- shows
- producing
- Prior art date
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- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 title claims abstract description 198
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 title claims abstract description 158
- 238000000034 method Methods 0.000 title claims abstract description 34
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 21
- 239000010936 titanium Substances 0.000 claims abstract description 16
- 229910052719 titanium Inorganic materials 0.000 claims abstract description 16
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims abstract description 14
- 238000004519 manufacturing process Methods 0.000 claims abstract description 11
- 238000001228 spectrum Methods 0.000 claims description 29
- 230000004580 weight loss Effects 0.000 claims description 9
- 239000002131 composite material Substances 0.000 claims description 7
- 238000005259 measurement Methods 0.000 claims description 2
- 239000011941 photocatalyst Substances 0.000 abstract description 14
- 239000000126 substance Substances 0.000 abstract description 14
- 230000001954 sterilising effect Effects 0.000 abstract description 5
- 238000004659 sterilization and disinfection Methods 0.000 abstract description 5
- 230000003373 anti-fouling effect Effects 0.000 abstract description 4
- 238000000354 decomposition reaction Methods 0.000 abstract description 4
- 239000000463 material Substances 0.000 abstract description 4
- 238000004332 deodorization Methods 0.000 abstract description 3
- 230000007613 environmental effect Effects 0.000 abstract description 3
- 230000001699 photocatalysis Effects 0.000 abstract description 3
- 239000013585 weight reducing agent Substances 0.000 abstract 1
- 239000000243 solution Substances 0.000 description 18
- 238000002834 transmittance Methods 0.000 description 15
- 238000001237 Raman spectrum Methods 0.000 description 14
- 238000010438 heat treatment Methods 0.000 description 12
- 239000002245 particle Substances 0.000 description 12
- 238000002411 thermogravimetry Methods 0.000 description 9
- RBTBFTRPCNLSDE-UHFFFAOYSA-N 3,7-bis(dimethylamino)phenothiazin-5-ium Chemical compound C1=CC(N(C)C)=CC2=[S+]C3=CC(N(C)C)=CC=C3N=C21 RBTBFTRPCNLSDE-UHFFFAOYSA-N 0.000 description 7
- 239000013078 crystal Substances 0.000 description 7
- 229960000907 methylthioninium chloride Drugs 0.000 description 7
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 6
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 6
- 238000002441 X-ray diffraction Methods 0.000 description 6
- 239000007864 aqueous solution Substances 0.000 description 6
- 238000006243 chemical reaction Methods 0.000 description 6
- 239000011521 glass Substances 0.000 description 6
- 229910052751 metal Inorganic materials 0.000 description 6
- 239000002184 metal Substances 0.000 description 6
- KELHQGOVULCJSG-UHFFFAOYSA-N n,n-dimethyl-1-(5-methylfuran-2-yl)ethane-1,2-diamine Chemical compound CN(C)C(CN)C1=CC=C(C)O1 KELHQGOVULCJSG-UHFFFAOYSA-N 0.000 description 6
- 238000002310 reflectometry Methods 0.000 description 6
- 230000005855 radiation Effects 0.000 description 5
- 238000001035 drying Methods 0.000 description 4
- 239000000203 mixture Substances 0.000 description 4
- 239000000049 pigment Substances 0.000 description 4
- 238000003980 solgel method Methods 0.000 description 4
- 238000004458 analytical method Methods 0.000 description 3
- 238000005229 chemical vapour deposition Methods 0.000 description 3
- 230000007423 decrease Effects 0.000 description 3
- 239000007789 gas Substances 0.000 description 3
- 230000031700 light absorption Effects 0.000 description 3
- 239000000843 powder Substances 0.000 description 3
- 239000000047 product Substances 0.000 description 3
- 239000002994 raw material Substances 0.000 description 3
- -1 superoxide anions Chemical class 0.000 description 3
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 238000003917 TEM image Methods 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 238000010908 decantation Methods 0.000 description 2
- 230000001877 deodorizing effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000007602 hot air drying Methods 0.000 description 2
- 230000007062 hydrolysis Effects 0.000 description 2
- 238000006460 hydrolysis reaction Methods 0.000 description 2
- 230000003301 hydrolyzing effect Effects 0.000 description 2
- 238000010335 hydrothermal treatment Methods 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 239000011261 inert gas Substances 0.000 description 2
- 239000007791 liquid phase Substances 0.000 description 2
- 229910044991 metal oxide Inorganic materials 0.000 description 2
- 150000004706 metal oxides Chemical class 0.000 description 2
- 150000002739 metals Chemical class 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 229910052760 oxygen Inorganic materials 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
- 239000012071 phase Substances 0.000 description 2
- 238000000746 purification Methods 0.000 description 2
- 238000005245 sintering Methods 0.000 description 2
- 239000002002 slurry Substances 0.000 description 2
- 229910000348 titanium sulfate Inorganic materials 0.000 description 2
- XJDNKRIXUMDJCW-UHFFFAOYSA-J titanium tetrachloride Chemical compound Cl[Ti](Cl)(Cl)Cl XJDNKRIXUMDJCW-UHFFFAOYSA-J 0.000 description 2
- 239000012808 vapor phase Substances 0.000 description 2
- 238000005406 washing Methods 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 239000002351 wastewater Substances 0.000 description 2
- 229910002012 Aerosil® Inorganic materials 0.000 description 1
- 235000002198 Annona diversifolia Nutrition 0.000 description 1
- 238000004438 BET method Methods 0.000 description 1
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 1
- 241000282842 Lama glama Species 0.000 description 1
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 description 1
- 241000700124 Octodon degus Species 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000002378 acidificating effect Effects 0.000 description 1
- 150000001299 aldehydes Chemical class 0.000 description 1
- 150000004703 alkoxides Chemical class 0.000 description 1
- 229910052786 argon Inorganic materials 0.000 description 1
- 238000001354 calcination Methods 0.000 description 1
- 238000005119 centrifugation Methods 0.000 description 1
- 238000003889 chemical engineering Methods 0.000 description 1
- 239000007795 chemical reaction product Substances 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000012153 distilled water Substances 0.000 description 1
- 238000005868 electrolysis reaction Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000010419 fine particle Substances 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- ZZUFCTLCJUWOSV-UHFFFAOYSA-N furosemide Chemical compound C1=C(Cl)C(S(=O)(=O)N)=CC(C(O)=O)=C1NCC1=CC=CO1 ZZUFCTLCJUWOSV-UHFFFAOYSA-N 0.000 description 1
- 229910052736 halogen Inorganic materials 0.000 description 1
- 150000002367 halogens Chemical class 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 238000005342 ion exchange Methods 0.000 description 1
- 230000002101 lytic effect Effects 0.000 description 1
- 239000002105 nanoparticle Substances 0.000 description 1
- 229910017604 nitric acid Inorganic materials 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 239000007800 oxidant agent Substances 0.000 description 1
- 238000006864 oxidative decomposition reaction Methods 0.000 description 1
- 238000006068 polycondensation reaction Methods 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 239000011164 primary particle Substances 0.000 description 1
- 239000008213 purified water Substances 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- LLZRNZOLAXHGLL-UHFFFAOYSA-J titanic acid Chemical compound O[Ti](O)(O)O LLZRNZOLAXHGLL-UHFFFAOYSA-J 0.000 description 1
- 239000004408 titanium dioxide Substances 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Classifications
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C30/00—Coating with metallic material characterised only by the composition of the metallic material, i.e. not characterised by the coating process
-
- 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
-
- 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
- B01J35/00—Catalysts, in general, characterised by their form or physical properties
-
- 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
- B01J35/00—Catalysts, in general, characterised by their form or physical properties
- B01J35/30—Catalysts, in general, characterised by their form or physical properties characterised by their physical properties
- B01J35/39—Photocatalytic properties
-
- 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
- B01J37/348—Electrochemical processes, e.g. electrochemical deposition or anodisation
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B82—NANOTECHNOLOGY
- B82Y—SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
- B82Y30/00—Nanotechnology for materials or surface science, e.g. nanocomposites
-
- 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
- C01G23/047—Titanium dioxide
-
- 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
- C01G23/047—Titanium dioxide
- C01G23/08—Drying; Calcining ; After treatment of titanium oxide
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C26/00—Coating not provided for in groups C23C2/00 - C23C24/00
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C8/00—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
- C23C8/06—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using gases
- C23C8/08—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using gases only one element being applied
- C23C8/10—Oxidising
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- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C8/00—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
- C23C8/06—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using gases
- C23C8/36—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using gases using ionised gases, e.g. ionitriding
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- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D11/00—Electrolytic coating by surface reaction, i.e. forming conversion layers
- C25D11/02—Anodisation
- C25D11/026—Anodisation with spark discharge
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- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D11/00—Electrolytic coating by surface reaction, i.e. forming conversion layers
- C25D11/02—Anodisation
- C25D11/26—Anodisation of refractory metals or alloys based thereon
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- 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
- C01P2002/72—Crystal-structural characteristics defined by measured X-ray, neutron or electron diffraction data by d-values or two theta-values, e.g. as X-ray diagram
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- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2002/00—Crystal-structural characteristics
- C01P2002/80—Crystal-structural characteristics defined by measured data other than those specified in group C01P2002/70
- C01P2002/82—Crystal-structural characteristics defined by measured data other than those specified in group C01P2002/70 by IR- or Raman-data
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- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2002/00—Crystal-structural characteristics
- C01P2002/80—Crystal-structural characteristics defined by measured data other than those specified in group C01P2002/70
- C01P2002/84—Crystal-structural characteristics defined by measured data other than those specified in group C01P2002/70 by UV- or VIS- data
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- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2002/00—Crystal-structural characteristics
- C01P2002/80—Crystal-structural characteristics defined by measured data other than those specified in group C01P2002/70
- C01P2002/88—Crystal-structural characteristics defined by measured data other than those specified in group C01P2002/70 by thermal analysis data, e.g. TGA, DTA, DSC
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- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2004/00—Particle morphology
- C01P2004/01—Particle morphology depicted by an image
- C01P2004/04—Particle morphology depicted by an image obtained by TEM, STEM, STM or AFM
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- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2004/00—Particle morphology
- C01P2004/60—Particles characterised by their size
- C01P2004/64—Nanometer sized, i.e. from 1-100 nanometer
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- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2006/00—Physical properties of inorganic compounds
- C01P2006/32—Thermal properties
- C01P2006/37—Stability against thermal decomposition
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- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2006/00—Physical properties of inorganic compounds
- C01P2006/80—Compositional purity
- C01P2006/82—Compositional purity water content
Definitions
- Titanium oxide and method for producing the same
- the present invention relates to a novel anatase-type titanium oxide having a particularly high photocatalytic activity as one of photocatalysts useful as an environmental purification material such as harmful substance removal, malodorous substance deodorization decomposition, antifouling, and sterilization, and a method for producing the same.
- Photocatalysts are adsorbed by harmful substances (aldehydes, etc.), oxidative decomposition, and odorous substances (regulated by the Odor Prevention Law) due to radical substances (hydroxy radicals, superoxide anions) that are generated when the surface is irradiated with ultraviolet rays.
- the substance has functions such as deodorizing, antifouling, and sterilization. In recent years, the use of these functions has been attempted by coating this photocatalyst.
- Many metal oxides can be used as photocatalysts, but among these, titanium oxide, which is generally highly active, is often used as a photocatalyst.
- Titanium oxide has three types of crystals, an anisose type, a rutile type, and a brookite type, and an amorphous form (amorphous). Among them, an anisanoze type titanium oxide is functional and safe. Excellent on both sides.
- anatase type titanium oxide powder there are a gas phase method and a liquid phase method for obtaining an anatase type titanium oxide powder.
- Degu ss aP -25 (manufactured by Nippon Aerosil Co., Ltd.) is a typical anatase-type titanium oxide produced by the gas phase method, but it hydrolyzes titanium chloride at a high temperature of about 1000 ° C in an oxygen atmosphere. It is said that titanium oxide powder having a specific surface area of 40 m 2 / g (BET method) is produced by condensing the hydrolyzate.
- a method of preparing titanium oxide by a CVD (chemical vapor deposition) method in a furnace temperature range of 600 ° C. to 800 ° C. see Non-Patent Document 1).
- a sol-gel method As a method for obtaining anatase-type titanium oxide by a liquid phase method, a sol-gel method, a HyCOM method (Hydro t he rma l C r y t a l i za t i on i n O r ga n i c Med i a), and a sulfuric acid method are disclosed in related technical literature.
- Titanium oxide in the sol-gel method is a process of obtaining hydrous titanium oxide by hydrolysis from titanium alkoxide under normal pressure and calcining titanium hydroxide by polycondensation by heating to titanium oxide. Two steps are necessary (see Non-Patent Document 2).
- the HyCOM method uses pressure (10) as water necessary for alkoxide hydrolysis. It is known as a method for obtaining titanium oxide by supplying moisture in the above gas or vapor-like moisture to a solvent in which titanium alkoxide is dissolved (see Non-Patent Document 3).
- the sulfuric acid method discloses that titanium oxide can be obtained by heating, hydrolyzing, and baking titanium sulfate (see Patent Document 1).
- a method of heat-treating titania sol, titania gel or titania sol-gel mixture in a sealed container is also disclosed (see Patent Document 2).
- Non-Patent Literature 1 Journal of Chemical Engineering, Vol. 16, No. 3, pages 584 to 587, published in May 1990
- Non-Patent Document 2 “Science of the Sol-Gel Method, pp. 8-15, published in July 1988, Agné Jofusha”
- Non-Patent Document 3 Journal Material Science Letter No.15 197 ⁇
- Patent Document 1 Japanese Patent Laid-Open No. 7-171408
- Patent Document 2 Japanese Patent Laid-Open No. 11-335121
- the reaction atmosphere should be raised to a high temperature (normally 800 ° C or higher in the vapor phase method) when preparing the anatase-type titanium oxide in any of the above methods. It is difficult to implement from the viewpoint of operability and safety, and special equipment is required to use highly reactive titanium chloride as a raw material. There are disadvantages such as. In CVD method, the problems on raw materials are exactly the same, and the product has impurities such as halogen. There are also problems.
- anatase-type titanium oxide is obtained by the sol-gel method
- a sintering step is essential, and the heating temperature for sintering needs to be in the range of 300 to 700 ° C.
- the heat treatment is less than 300, the resulting titanium oxide remains amorphous.
- the heat treatment is performed at a temperature exceeding 700 ° C.
- the anatase-type titanium oxide has a low photocatalytic function as a rutile type. Crystal transition to.
- anatase type and rutile type titanium oxide may be a mixture depending on the size of the particles to be fired, the structure of the heating equipment used, and the heating method.
- Titanium oxide obtained by the HyC OM method is anatase-type even after firing at a temperature exceeding 90 ° C and is characterized by high heat resistance.
- attention must be paid to moisture management in the raw material.
- a special reaction apparatus is required to generate high-pressure steam.
- titanium oxide In order to obtain titanium oxide by the sulfuric acid method, sodium hydroxide is added to acidic titanium sol obtained by heating and hydrolyzing titanium sulfate, adjusted to PH 7, filtered, washed and crystallized. Next, water was added to the obtained titanium oxide wet cake to prepare a titanium oxide slurry, sodium hydroxide was further added to adjust the pH to 7, and then the mixture was sterilized at 1550 ° C for 3 hours. Hydrothermal treatment is performed. Then, after adding nitric acid to the slurry after hydrothermal treatment and adjusting to PH 7, it requires multiple steps of filtration, washing with water, and drying (1 10 ° C, 3 hours). There is a problem that must not be.
- Non-patent document 4 discloses a method for producing titanium monoxide by a pulse plasma method at a high current amount, but does not disclose titanium oxide, and does not describe a method for producing titanium oxide. Means for solving the problem
- the inventors of the present invention have made extensive studies and can obtain titanium oxide, which is a metal oxide, by inserting a titanium metal electrode in water and generating a pulsed plasma between the metal electrodes under a low current amount. As a result, the present inventors have found that it can be achieved.
- Titanium oxide having a light reflectance of 80% or less at a wavelength of 400 nm to 700 nm.
- Titanium oxide whose thermal weight loss rate from 400 ° C to 800 ° C is 1.0% or less.
- pulse plasma is generated at less than 5 amperes between titanium electrodes in water to oxidize titanium
- [6] A method for producing a composite titanium oxide having an anatase structure and a rutile structure, wherein the anatase type titanium oxide obtained by the method according to [5] is heated.
- the Raman spectrum measurement has at least two peaks between 350 cm— 1 and 700 cm— 1 , and the peak between 450 cm— 1 and 550 cm— 1 is higher than the other peaks. Titanium oxide according to [4] having low strength.
- titanium oxide having a high light absorptivity having a light reflectance of 80% or less at a wavelength of 400 nm to 700 nm.
- Such titanium oxide is useful as a pigment or photocatalyst because it absorbs light not only in the ultraviolet region but also in the visible light region.
- FIG. 1 is an X-ray crystallographic view of titanium oxide obtained in Example 1.
- FIG. 2 is a transmission electron micrograph of the titanium oxide obtained in Example 1. a) is a low resolution photo, and b) is a photo at high resolution.
- FIG. 3 is a graph showing the results of thermogravimetric analysis of the titanium oxide obtained in Example 1.
- FIG. 4 is an ultraviolet-visible reflection spectrum of titanium oxide obtained in Examples 1 to 5 and Reference Example. 1 is an ultraviolet-visible reflection spectrum of titanium oxide obtained in Example 1, 2 is an ultraviolet-visible reflection spectrum of titanium oxide obtained in Example 2, and 3 is an example. 3 is the ultraviolet-visible reflection spectrum of titanium oxide obtained in 3, 4 is the ultraviolet-visible reflection spectrum of titanium oxide obtained in Example 4, and 5 is the oxidation spectrum obtained in Example 5. Titanium's ultraviolet-visible reflection spectrum, and 6 is the ultraviolet-visible reflection spectrum of titanium oxide obtained in the reference example.
- FIG. 5 is a graph showing the thermogravimetric analysis results of the titanium oxide obtained in the reference example.
- FIG. 6 is an X-ray crystal analysis diagram of titanium oxide obtained in Examples 1 to 5 and Reference Example.
- FIG. 7 is a Raman spectrum of titanium oxide obtained in Examples 1 to 5 and Reference Example.
- titanium oxide is obtained by a method of generating pulsed plasma using a titanium electrode in water.
- an ana- lytic type titanium oxide is selectively produced.
- the produced titanium oxide has a blue color, and the primary particles have a particle size of several to several tens of nanometers and can be obtained as aggregates.
- the reason for the blue color is not clear, but the absorption wavelength range is different from that of general anatase-type titanium oxide, and it can be attributed to the fact that it reaches from the ultraviolet range to the visible range and further to the infrared range. It is possible. For this reason, since it absorbs light not only in the ultraviolet region but also in the visible light region, it can be expected that it will be effective as a new pigment and as a photocatalyst.
- titanium oxide absorbs only ultraviolet light, so it is less effective in places where UV light cannot be used effectively, and is effective because it can be used in the visible light region. This increases the performance, and enables use in the air as well as in the air. Therefore, utilization as a photocatalyst for uses such as deodorization, sterilization, and photoelectric conversion can be expected.
- Titanium which is an electrode used in the present invention, is not particularly limited, and metal titanium that is usually available may be used. In consideration of the structural distortion due to impurities and the effect on light absorption, a product with a purity of 99% or more is usually used.
- a product having a purity of 9.5% or more can be used.
- any form such as a bar shape, a wire shape, and a plate shape may be used.
- the size of both poles it may have a shape such that one of them is different.
- water is used as the oxidizing agent.
- the water to be used is not limited to profit, but distilled water, purified water, etc. can be used. In view of contamination with different metals, it is preferable to use ion exchange water.
- the working temperature in the present invention is not particularly limited, and is carried out in the range of room temperature to 300 ° C.
- An excessively high temperature is not preferable because the vapor pressure of water increases and a special reaction vessel is required, and an excessively low temperature is not preferable because the production efficiency of titanium oxide at the time of plasma generation decreases. Therefore, it is preferably carried out at 60 ° C. or more and 20 ° C. or less, more preferably 80 ° C. or more and 120 ° C. or less.
- titanium oxide is produced by generating plasma.
- the voltage for generating plasma is not particularly limited, and it is in the range of 50 V to 50 V, safety and the need for special equipment. More preferably, it is carried out in the range of 80 V to 30 0 V. Care must be taken because if the voltage is too low, the oxidation of titanium will not proceed sufficiently and a composite oxide may be obtained.
- the current for generating plasma is not particularly limited, and is in the range of 0.1 to less than 5 A, particularly in the range of 0.2 to less than 5 A, considering the energy efficiency, and is set to 0. It is preferable to carry out in the range of 2 to 4 A, more preferably in the range of 0.5 to 3.5 A. Care must be taken because currents that are too high may decompose during the reaction and produce oxides such as titanium monoxide.
- the cycle of the pulsed plasma is not particularly limited, and in order to improve the efficiency per unit time from 5 to 100 milliseconds, It is carried out in a cycle of 3 to 80 milliseconds, more preferably 1 to 50 milliseconds.
- the duration per pulsed plasma also varies depending on the applied voltage and current, but usually 1 to 100 microseconds, preferably 2 to 2 in consideration of the discharge efficiency. It is carried out in a range of 500 microphone mouth seconds, more preferably 5 to 100 microphone mouth seconds, especially 1 to 50 microseconds, preferably 2 to 30 microseconds.
- the method of applying vibration is not particularly limited, and it may be a method of applying vibration periodically or intermittently using a device such as a vibrator or an actuator. I don't know.
- the atmosphere for carrying out the present invention is not particularly limited, and it can be carried out under reduced pressure, under increased pressure, or under normal pressure, but there is a concern about generation of oxygen and hydrogen due to water electrolysis. In general, in consideration of safety and operability, it is carried out in an inert gas circulation atmosphere such as nitrogen or argon.
- Titanium oxide obtained in the present invention is deposited in water. Because of its high hydrophilicity, there are many particles floating in water, so it can be forced to settle using a centrifuge. Titanium oxide can be obtained by removing the water by a method such as decantation to obtain a deposit.
- the titanium oxide obtained in the present invention is thermally stable. Therefore, heat treatment up to 80 ° C. can be performed according to the required dryness and visible light reflectance. Even when heated, the photoreflectance can absorb visible light without exceeding 80% and is thermally stable.
- the heat treatment can be performed by either batch treatment or continuous treatment, and can be carried out in the air or under an inert gas.
- the rate of temperature rise is not particularly limited, but it is usually within the range of 0.1 ° C to 10 ° C per minute, preferably It: ⁇ 50 ° C. Is done.
- a titanium metal electrode (purity: 99% or more) with a diameter of 5 mm and a length of 100 mm in water, and fix the distance between the electrodes to 1 mm to prevent reaction products from accumulating on the electrode surface.
- a vibration of 200 Hz was applied.
- Each electrode was connected to an AC power source, and pulse discharge was performed at 200 V and 3 A. The discharge interval was 20 milliseconds and the discharge time was 20 microseconds. Simultaneously with the start of discharge, precipitation of titanium oxide was observed between the electrodes.
- the obtained titanium oxide was fired at 900 ° C., and the X-ray crystallographic analysis was consistent with that of rutile type titanium oxide. Thus, it was confirmed that the obtained substance was titanium oxide (T i 0 2 ). In addition, a transmission electron microscope lattice image of titanium oxide after 1 10 hot-air drying confirmed that the titanium oxide obtained after hot-air drying was anatase titanium oxide.
- Figures 1 and 6 show the results of X-ray crystallographic analysis of the obtained titanium oxide (XRD Cu R radiation, Rigaku RINT-2500VHF).
- Fig. 2 shows the transmission electron microscope (TEM Philips Tecnai F20 S-Twin) image of titanium oxide obtained after drying at 110 ° C in hot air, and thermogravimetric analysis of titanium oxide obtained after drying at 110 ° C in hot air (
- Fig. 3 shows the results of EXSTAR6000 (made by SII)
- Fig. 1 shows the UV-Vis reflection spectrum (JASC0 V-550 UV / VIS spectrometer) of titanium oxide obtained after drying at 110 ° C with hot air.
- Table 1 shows the weight loss rate in the thermogravimetric analysis and the reflectivity in the UV-visible reflection spectrum.
- FIG. 7 shows the Raman spectrum of the titanium oxide obtained (measured with NRS-3100 manufactured by JASCO Corporation).
- the titanium oxide 1 Omg obtained in Example 1 was added to 20 ml of methylene blue 10 ⁇ mo 1 / L aqueous solution in a 25 ml glass sample tube and dispersed using ultrasonic waves.
- the light transmittance at 630 nm of the obtained solution was measured, and the change rate of the color tone was measured with the transmittance of the titanium oxide non-added solution as the standard and the transmittance of the titanium oxide non-added solution as zero.
- Table 2 The results are shown in Table 2.
- Titanium oxide was obtained in the same manner as in Example 1 except that it was dried with hot air at 10 ° C. for 3 hours and further calcined at 300 ° C. for 3 hours.
- Figure 4 shows the ultraviolet-visible reflection spectrum of the resulting titanium oxide.
- Table 1 shows the weight loss rate in the thermogravimetric analysis and the reflectivity in the UV-visible reflection spectrum.
- Figure 6 shows the results of X-ray crystallographic analysis (XRD Cura radiation, Rigaku RINT-2500VHF) of the resulting composite titanium oxide.
- the titanium oxide 1 Omg obtained in Example 2 was added to 20 ml of methylene blue 10 mo 1 / L aqueous solution in a 25 ml glass sample tube and dispersed using ultrasonic waves.
- the light transmittance at 630 nm of the obtained solution was measured, and the change rate of the color tone was measured with the transmittance of the titanium oxide non-added solution as the standard and the transmittance of the titanium oxide non-added solution as zero.
- Table 2 The results are shown in Table 2.
- Titanium oxide was obtained in the same manner as in Example 1 except that it was dried with hot air at 10 ° C. for 3 hours and further calcined at 400 ° C. for 3 hours.
- Figure 4 shows the ultraviolet-visible reflection spectrum of the resulting titanium oxide.
- Table 1 shows the weight loss rate in the thermogravimetric analysis and the reflectivity in the UV-visible reflection spectrum.
- Figure 6 shows the results of X-ray crystallographic analysis of the obtained composite titanium oxide (XRD Cu ⁇ radiation, Rigaku RINT-2500VHF).
- Titanium oxide was obtained in the same manner as in Example 1 except that it was dried with hot air at 10 ° C. for 3 hours and further calcined at 500 ° C. for 3 hours.
- Figure 4 shows the ultraviolet-visible reflection spectrum of the resulting titanium oxide.
- Table 1 shows the weight loss rate in the thermogravimetric analysis and the reflectivity in the UV-visible reflection spectrum.
- Figure 6 shows the results of X-ray crystallographic analysis of the obtained composite titanium oxide (XRD Cu ⁇ radiation, Rigaku RINT-2500VHF).
- Titanium oxide was obtained in the same manner as in Example 1 except that it was dried with hot air at 110 ° C. for 3 hours and then calcined at 800 ° C. for 3 hours.
- Figure 4 shows the ultraviolet-visible reflection spectrum of the resulting titanium oxide.
- Table 1 shows the weight loss rate in the thermogravimetric analysis and the reflectivity in the UV-visible reflection spectrum.
- Figure 6 shows the results of X-ray crystallographic analysis of the obtained composite titanium oxide (XRD Cu ⁇ radiation, Rigaku RINT-2500VHF).
- Example 5 To a 25 ml glass sample tube, 1 mO of titanium oxide obtained in Example 5 was added to 20 ml of methylene blue 10 o 1 / L aqueous solution and dispersed using ultrasonic waves. The light transmittance at 630 nm of the obtained solution was measured, and the change rate of the color tone was measured with the transmittance of the titanium oxide non-added solution as the standard and the transmittance of the titanium oxide non-added solution as zero. The results are shown in Table 2.
- Example 1 was performed in the same manner as Example 1 except that the current was 1 A.
- the obtained titanium oxide was 0.2 g.
- the XRD spectrum and Raman spectrum of the obtained titanium oxide were the same as in Example 1.
- Example 2 The same operation as in Example 1 was performed except that the current was 2 A in Example 1.
- the obtained titanium oxide was 2.8 g.
- the XRD spectrum and Raman spectrum of the obtained titanium oxide were the same as in Example 1.
- Example 2 The same operation as in Example 1 was performed except that the current was 4 A in Example 1.
- the obtained titanium oxide was 6.0 g.
- XRD spectrum of the obtained titanium oxide, llama The spectrum was the same as in Example 1. Furthermore, there was a black deposit on the electrode and an agglomerate was obtained. As a result of analysis by XRD, the aggregate was titanium monoxide and the amount produced was 1.1 g.
- Example 1 was performed in the same manner as Example 1 except that the voltage was changed to 150V.
- the obtained titanium oxide was 1.2 g.
- the XRD spectrum and Raman spectrum of the obtained titanium oxide were the same as in Example 1.
- Example 2 The same operation as in Example 1 was performed except that the voltage was changed to 300 V in Example 1.
- the obtained titanium oxide was 6.2 g.
- the XRD spectrum and Raman spectrum of the obtained titanium oxide were the same as in Example 1. Furthermore, there were black deposits on the electrode, and aggregates were obtained. As a result of analysis by XRD, the aggregate was titanium monoxide and the amount produced was 2.1.
- Example 1 was performed in the same manner as Example 1 except that the discharge interval was set to 10 milliseconds.
- the obtained titanium oxide was 5.9 g.
- the XRD spectrum and Raman spectrum of the obtained titanium oxide were the same as in Example 1.
- Example 1 was performed in the same manner as Example 1 except that the discharge time was 40 microseconds.
- the obtained titanium oxide was 6.1 g.
- the XRD spectrum and Raman spectrum of the obtained titanium oxide were the same as in Example 1.
- Fig. 4 shows the UV-Visible reflection spectrum of Ishihara Sangyo Co., Ltd.'s Analyzing Type Titanium Oxide (trade name: ST-01).
- Table 1 shows the weight loss rate in the thermogravimetric analysis and the reflectivity in the UV-visible reflection spectrum.
- FIG. 7 shows the Raman spectrum of the obtained titanium oxide (measured with NRS-3100 manufactured by JASCO Corporation).
- Example 2 The same operation as in Example 1 was performed except that the current value was 5 A. Titanium dioxide (T i O 2 ) was not obtained, and titanium monoxide (T i O) was obtained.
- Example 1 was carried out in the same manner as Example 1 except that the voltage was 45 V. However, a titanium oxide could not be obtained.
- the titanium oxide of the present invention has a light reflectance of 40% or less at a wavelength of 400 nm to 700 nm, that is, in order to absorb visible light, It can be seen that it can be used as a photocatalyst. Depending on the environment in which titanium oxide is used and when it is added to the form in which it is used, it may be exposed to a high-temperature environment, and its properties must be maintained. For this purpose, high thermal stability is required.
- the titanium oxide of the present invention has a low weight loss rate (%) at 400 to 80 ° C. of 0.1 to 0.2%, high thermal stability, and is used and processed as a pigment or photocatalyst. It can be seen that it has characteristics such as no change in shape, such as decomposition.
- FIG. 1 also shows that the crystals constituting the particles obtained in Example 1 are nano-sized and do not have large crystallites.
- FIG. 2 shows that the particles obtained in Example 1 are fine particles. Higher definition
- the TEM image shows that the distance between crystals is 0.35 nm and has an anatase skeleton.
- Example 1 has a small decrease in thermal weight between 400 ° C. and 800 ° C.
- FIG. 5 shows that the titanium oxide of the reference example has a large decrease in thermal weight between 400 ° C. and 800 ° C., and the thermal stability is lower than that of the titanium oxide of Example 1.
- FIG. 4 shows the difference in light reflectance in the ultraviolet to visible light region of the particles obtained in Examples 1 to 5 and Reference Example.
- FIG. 6 shows that crystals grew by the heat treatment of Examples 1 to 5, and in these examples, titanium oxide containing anatase type to rutile type was obtained.
- tan has a surface structure different from that of the conventional anatase-type titanium oxide (reference example).
- titanium oxide has not obtained properties such as a photocatalyst in the ultraviolet to visible light region.
- characteristics that could not be achieved by conventional titanium oxide such as visible light absorption and high thermal stability were realized.
- Titanium oxide according to the present invention has high light absorption and absorbs light not only in the ultraviolet region but also in the visible light region. Therefore, it is suitable as a photocatalyst in addition to pigments, removing harmful substances, and deodorizing substances. Useful for environmental purification materials such as decomposition, antifouling, and sterilization.
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Abstract
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US12/811,611 US20110020213A1 (en) | 2008-01-04 | 2008-12-26 | Titanium oxide and method of producing the same |
EP08869929.3A EP2246304B1 (en) | 2008-01-04 | 2008-12-26 | Titanium oxide and method of producing the same |
CN2008801238838A CN101918320B (zh) | 2008-01-04 | 2008-12-26 | 氧化钛及其制造方法 |
JP2009548896A JP5652849B2 (ja) | 2008-01-04 | 2008-12-26 | 酸化チタンおよびその製造方法 |
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JP2014097915A (ja) * | 2012-11-15 | 2014-05-29 | Nagoya Univ | 高光触媒活性酸化チタンの製造方法 |
JP2020070220A (ja) * | 2018-11-01 | 2020-05-07 | 国立大学法人 熊本大学 | セリアナノ粒子の製造方法、およびセリアナノ粒子、研磨剤、研磨方法 |
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GB2516258B (en) * | 2013-07-16 | 2021-05-12 | Keronite International Ltd | High thermal conductivity insulated metal substrates produced by plasma electrolytic oxidation |
CN106637082A (zh) * | 2015-11-04 | 2017-05-10 | 北京有色金属研究总院 | 陶瓷金属化复合薄膜及其制备方法 |
KR102427956B1 (ko) * | 2020-06-11 | 2022-08-03 | 한국기초과학지원연구원 | 가시광 활성이 향상된 열안정성 다공성 티타늄산화물 및 이의 제조방법 |
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- 2008-12-26 EP EP08869929.3A patent/EP2246304B1/en not_active Not-in-force
- 2008-12-26 KR KR1020107011306A patent/KR20100109546A/ko not_active Application Discontinuation
- 2008-12-26 CN CN2008801238838A patent/CN101918320B/zh not_active Expired - Fee Related
- 2008-12-26 WO PCT/JP2008/073957 patent/WO2009087951A1/ja active Application Filing
- 2008-12-26 US US12/811,611 patent/US20110020213A1/en not_active Abandoned
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Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
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JP2014097915A (ja) * | 2012-11-15 | 2014-05-29 | Nagoya Univ | 高光触媒活性酸化チタンの製造方法 |
JP2020070220A (ja) * | 2018-11-01 | 2020-05-07 | 国立大学法人 熊本大学 | セリアナノ粒子の製造方法、およびセリアナノ粒子、研磨剤、研磨方法 |
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CN101918320B (zh) | 2013-05-15 |
US20110020213A1 (en) | 2011-01-27 |
TW200936505A (en) | 2009-09-01 |
EP2246304A1 (en) | 2010-11-03 |
KR20100109546A (ko) | 2010-10-08 |
TWI428281B (zh) | 2014-03-01 |
JPWO2009087951A1 (ja) | 2011-05-26 |
EP2246304A4 (en) | 2012-05-02 |
CN101918320A (zh) | 2010-12-15 |
JP5652849B2 (ja) | 2015-01-14 |
EP2246304B1 (en) | 2016-11-30 |
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