CN110871058A - Photocatalytic unit and photocatalytic method thereof - Google Patents
Photocatalytic unit and photocatalytic method thereof Download PDFInfo
- Publication number
- CN110871058A CN110871058A CN201811003021.3A CN201811003021A CN110871058A CN 110871058 A CN110871058 A CN 110871058A CN 201811003021 A CN201811003021 A CN 201811003021A CN 110871058 A CN110871058 A CN 110871058A
- Authority
- CN
- China
- Prior art keywords
- photocatalyst
- pore
- foamed ceramic
- tio
- led lamp
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 230000001699 photocatalysis Effects 0.000 title claims abstract description 72
- 238000000034 method Methods 0.000 title claims abstract description 41
- 239000000919 ceramic Substances 0.000 claims abstract description 117
- 239000011148 porous material Substances 0.000 claims abstract description 100
- 239000011941 photocatalyst Substances 0.000 claims abstract description 98
- 239000002131 composite material Substances 0.000 claims abstract description 61
- 239000013078 crystal Substances 0.000 claims abstract description 41
- 239000006260 foam Substances 0.000 claims abstract description 24
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N titanium dioxide Inorganic materials O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims description 127
- 239000003054 catalyst Substances 0.000 claims description 79
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 claims description 55
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 39
- 239000002245 particle Substances 0.000 claims description 28
- 239000004408 titanium dioxide Substances 0.000 claims description 27
- 238000007146 photocatalysis Methods 0.000 claims description 22
- 239000000758 substrate Substances 0.000 claims description 18
- 238000009423 ventilation Methods 0.000 claims description 8
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 claims description 4
- 229910052753 mercury Inorganic materials 0.000 claims description 4
- 229910003158 γ-Al2O3 Inorganic materials 0.000 claims description 4
- 238000003491 array Methods 0.000 claims description 3
- 229910052593 corundum Inorganic materials 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims description 3
- 238000013032 photocatalytic reaction Methods 0.000 claims description 3
- 229910001845 yogo sapphire Inorganic materials 0.000 claims description 3
- 230000009471 action Effects 0.000 claims description 2
- 230000005855 radiation Effects 0.000 claims description 2
- 230000003197 catalytic effect Effects 0.000 abstract description 7
- 239000002002 slurry Substances 0.000 description 38
- 239000000843 powder Substances 0.000 description 28
- 239000002243 precursor Substances 0.000 description 25
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 25
- 238000012360 testing method Methods 0.000 description 20
- 238000001035 drying Methods 0.000 description 19
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 18
- 239000007789 gas Substances 0.000 description 18
- 238000005470 impregnation Methods 0.000 description 18
- SOQBVABWOPYFQZ-UHFFFAOYSA-N oxygen(2-);titanium(4+) Chemical compound [O-2].[O-2].[Ti+4] SOQBVABWOPYFQZ-UHFFFAOYSA-N 0.000 description 17
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 16
- 239000010936 titanium Substances 0.000 description 16
- 229910052719 titanium Inorganic materials 0.000 description 16
- 239000003292 glue Substances 0.000 description 14
- 239000002253 acid Substances 0.000 description 13
- 238000002156 mixing Methods 0.000 description 13
- 241000191963 Staphylococcus epidermidis Species 0.000 description 10
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 description 9
- 239000000356 contaminant Substances 0.000 description 9
- 238000001514 detection method Methods 0.000 description 9
- 238000002360 preparation method Methods 0.000 description 9
- 239000005995 Aluminium silicate Substances 0.000 description 8
- 239000002202 Polyethylene glycol Substances 0.000 description 8
- 235000012211 aluminium silicate Nutrition 0.000 description 8
- 230000000694 effects Effects 0.000 description 8
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 description 8
- 229910052757 nitrogen Inorganic materials 0.000 description 8
- 229920001223 polyethylene glycol Polymers 0.000 description 8
- 238000002791 soaking Methods 0.000 description 8
- 230000000052 comparative effect Effects 0.000 description 7
- 238000002474 experimental method Methods 0.000 description 7
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 6
- 238000011068 loading method Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 5
- 238000009826 distribution Methods 0.000 description 5
- 230000009467 reduction Effects 0.000 description 5
- 238000007619 statistical method Methods 0.000 description 5
- 230000001954 sterilising effect Effects 0.000 description 5
- 238000004659 sterilization and disinfection Methods 0.000 description 5
- IKHGUXGNUITLKF-UHFFFAOYSA-N Acetaldehyde Chemical compound CC=O IKHGUXGNUITLKF-UHFFFAOYSA-N 0.000 description 4
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 4
- 229920002134 Carboxymethyl cellulose Polymers 0.000 description 4
- KFZMGEQAYNKOFK-UHFFFAOYSA-N Isopropanol Chemical compound CC(C)O KFZMGEQAYNKOFK-UHFFFAOYSA-N 0.000 description 4
- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 description 4
- 239000001768 carboxy methyl cellulose Substances 0.000 description 4
- 235000010948 carboxy methyl cellulose Nutrition 0.000 description 4
- 239000008112 carboxymethyl-cellulose Substances 0.000 description 4
- 239000003344 environmental pollutant Substances 0.000 description 4
- 238000010438 heat treatment Methods 0.000 description 4
- 231100000719 pollutant Toxicity 0.000 description 4
- 229940057847 polyethylene glycol 600 Drugs 0.000 description 4
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 3
- WSFSSNUMVMOOMR-UHFFFAOYSA-N Formaldehyde Chemical compound O=C WSFSSNUMVMOOMR-UHFFFAOYSA-N 0.000 description 3
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 3
- 239000006185 dispersion Substances 0.000 description 3
- 238000007654 immersion Methods 0.000 description 3
- 239000011261 inert gas Substances 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 239000004065 semiconductor Substances 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- TYKCBTYOMAUNLH-MTOQALJVSA-J (z)-4-oxopent-2-en-2-olate;titanium(4+) Chemical compound [Ti+4].C\C([O-])=C\C(C)=O.C\C([O-])=C\C(C)=O.C\C([O-])=C\C(C)=O.C\C([O-])=C\C(C)=O TYKCBTYOMAUNLH-MTOQALJVSA-J 0.000 description 2
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical compound S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 description 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 2
- CTQNGGLPUBDAKN-UHFFFAOYSA-N O-Xylene Chemical compound CC1=CC=CC=C1C CTQNGGLPUBDAKN-UHFFFAOYSA-N 0.000 description 2
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 2
- MCMNRKCIXSYSNV-UHFFFAOYSA-N Zirconium dioxide Chemical compound O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 description 2
- 229910021529 ammonia Inorganic materials 0.000 description 2
- 239000011230 binding agent Substances 0.000 description 2
- 238000006555 catalytic reaction Methods 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 229910000037 hydrogen sulfide Inorganic materials 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- WSFSSNUMVMOOMR-NJFSPNSNSA-N methanone Chemical compound O=[14CH2] WSFSSNUMVMOOMR-NJFSPNSNSA-N 0.000 description 2
- 239000005416 organic matter Substances 0.000 description 2
- 239000003960 organic solvent Substances 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 239000002957 persistent organic pollutant Substances 0.000 description 2
- 238000000746 purification Methods 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 229910052717 sulfur Inorganic materials 0.000 description 2
- 239000011593 sulfur Substances 0.000 description 2
- 239000000725 suspension Substances 0.000 description 2
- 238000010998 test method Methods 0.000 description 2
- 239000012855 volatile organic compound Substances 0.000 description 2
- 239000008096 xylene Substances 0.000 description 2
- -1 C1-C5 alcohol Chemical compound 0.000 description 1
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- XFXPMWWXUTWYJX-UHFFFAOYSA-N Cyanide Chemical compound N#[C-] XFXPMWWXUTWYJX-UHFFFAOYSA-N 0.000 description 1
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 description 1
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 description 1
- IOVCWXUNBOPUCH-UHFFFAOYSA-M Nitrite anion Chemical compound [O-]N=O IOVCWXUNBOPUCH-UHFFFAOYSA-M 0.000 description 1
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N Phenol Chemical compound OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- ZMZDMBWJUHKJPS-UHFFFAOYSA-M Thiocyanate anion Chemical compound [S-]C#N ZMZDMBWJUHKJPS-UHFFFAOYSA-M 0.000 description 1
- 238000002441 X-ray diffraction Methods 0.000 description 1
- IKHGUXGNUITLKF-XPULMUKRSA-N acetaldehyde Chemical compound [14CH]([14CH3])=O IKHGUXGNUITLKF-XPULMUKRSA-N 0.000 description 1
- 238000004220 aggregation Methods 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- 238000004887 air purification Methods 0.000 description 1
- 238000006136 alcoholysis reaction Methods 0.000 description 1
- WNROFYMDJYEPJX-UHFFFAOYSA-K aluminium hydroxide Chemical compound [OH-].[OH-].[OH-].[Al+3] WNROFYMDJYEPJX-UHFFFAOYSA-K 0.000 description 1
- 239000012752 auxiliary agent Substances 0.000 description 1
- 150000001555 benzenes Chemical class 0.000 description 1
- 230000003115 biocidal effect Effects 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 239000000969 carrier Substances 0.000 description 1
- 239000012876 carrier material Substances 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000011538 cleaning material Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000005202 decontamination Methods 0.000 description 1
- 230000003588 decontaminative effect Effects 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 238000004332 deodorization Methods 0.000 description 1
- 238000003795 desorption Methods 0.000 description 1
- 238000007598 dipping method Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000011049 filling Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 150000008282 halocarbons Chemical class 0.000 description 1
- ZMZDMBWJUHKJPS-UHFFFAOYSA-N hydrogen thiocyanate Natural products SC#N ZMZDMBWJUHKJPS-UHFFFAOYSA-N 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- 239000011777 magnesium Substances 0.000 description 1
- 229910052748 manganese Inorganic materials 0.000 description 1
- 239000011572 manganese Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 229910052976 metal sulfide Inorganic materials 0.000 description 1
- VUZPPFZMUPKLLV-UHFFFAOYSA-N methane;hydrate Chemical compound C.O VUZPPFZMUPKLLV-UHFFFAOYSA-N 0.000 description 1
- 244000005700 microbiome Species 0.000 description 1
- 150000007522 mineralic acids Chemical class 0.000 description 1
- 238000006386 neutralization reaction Methods 0.000 description 1
- 229910017604 nitric acid Inorganic materials 0.000 description 1
- QJGQUHMNIGDVPM-UHFFFAOYSA-N nitrogen group Chemical group [N] QJGQUHMNIGDVPM-UHFFFAOYSA-N 0.000 description 1
- 231100000252 nontoxic Toxicity 0.000 description 1
- 230000003000 nontoxic effect Effects 0.000 description 1
- 231100000956 nontoxicity Toxicity 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 239000012860 organic pigment Substances 0.000 description 1
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 1
- 238000001935 peptisation Methods 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 239000000575 pesticide Substances 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- BDERNNFJNOPAEC-UHFFFAOYSA-N propan-1-ol Chemical compound CCCO BDERNNFJNOPAEC-UHFFFAOYSA-N 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 description 1
- 229910010271 silicon carbide Inorganic materials 0.000 description 1
- 229910052814 silicon oxide Inorganic materials 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
- 238000007581 slurry coating method Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 238000013112 stability test Methods 0.000 description 1
- 239000004094 surface-active agent Substances 0.000 description 1
- 238000009210 therapy by ultrasound Methods 0.000 description 1
- 150000003568 thioethers Chemical class 0.000 description 1
Images
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
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/007—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by irradiation
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/86—Catalytic processes
- B01D53/8603—Removing sulfur compounds
- B01D53/8609—Sulfur oxides
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/86—Catalytic processes
- B01D53/8603—Removing sulfur compounds
- B01D53/8612—Hydrogen sulfide
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/86—Catalytic processes
- B01D53/8621—Removing nitrogen compounds
- B01D53/8634—Ammonia
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/86—Catalytic processes
- B01D53/8668—Removing organic compounds not provided for in B01D53/8603 - B01D53/8665
-
- 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
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/91—Bacteria; Microorganisms
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Health & Medical Sciences (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Biomedical Technology (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Toxicology (AREA)
- Catalysts (AREA)
Abstract
The invention discloses a photocatalytic unit and a photocatalytic method thereof. The photocatalytic unit includes: a photocatalyst and a light source device. The photocatalyst comprises a foamed ceramic carrier and TiO distributed on the surface of the foamed ceramic carrier2The crystal grain and the foamed ceramic carrier comprise foamed ceramic and composite oxide, the foamed ceramic is in an open-cell foam structure, the pore edges of the foamed ceramic contain three-dimensional through micron-sized pore channels, and the composite oxide is distributed on the surfaces of the pore edges and in the pore channels. Using the above-mentioned photocatalysisThe unit has good catalytic activity and stability when used for purifying gas.
Description
Technical Field
The invention relates to a photocatalytic unit and a photocatalytic method thereof, belonging to the field of photocatalysis.
Background
The photocatalytic oxidation of semiconductor can be performedThe organic matter is decomposed into carbon dioxide and water by photocatalysis at normal temperature and normal pressure, and the novel technology which can not cause secondary pollution arouses the high attention of researchers in various countries in the world. Researches show that various organic pollutants in water and air can be effectively degraded by utilizing a semiconductor photocatalysis method, such as halogenated hydrocarbon, nitroaromatic, phenol, organic pigment, pesticide, surfactant and the like; cyanide, nitrite, thiocyanate and the like can also be converted into non-toxic or low-toxic compounds; can also be applied to the fields of antibiosis, deodorization, air purification, self-cleaning materials and the like. The semiconductor photocatalysts which have been studied so far mainly include metal oxides, sulfides and the like, among which titanium dioxide (TiO)2) Has the characteristics of good chemical stability, safety, no toxicity, low cost and the like, and is widely researched and applied in the direction of photocatalytic oxidation.
The titanium dioxide photocatalyst is generally used in the form of powder, but this causes a suspension system in a fluid, thereby causing technical problems of difficulty in separation and difficulty in recovery, and thus limiting practical use. The titanium dioxide is fixed on the carrier, so that the defect of the suspension phase titanium dioxide photocatalyst can be overcome. Therefore, finding a suitable carrier and an efficient loading method to fix the catalyst and improve the photocatalytic efficiency of the catalyst are key points in realizing the industrialization of the titanium dioxide photocatalyst, and are hot spots in the research field of the photocatalytic technology in recent years.
At present, when a ceramic carrier is used as a carrier material, a titanium dioxide loading method is generally adopted as a titanium glue loading method or a titanium oxide crystal grain is added into a binder loading method, and then the titanium dioxide loading method is sintered at high temperature to prepare the supported photocatalyst. The ceramic supported photocatalyst has the technical problems that: first, the use of non-catalytic materials such as binders can affect the amount of titanium dioxide on the surface during loading and sintering, thereby affecting catalytic activity; secondly, when the ceramic carrier is loaded with titanium dioxide, high-temperature roasting is generally adopted to increase the firmness of the titanium dioxide load, but the titanium dioxide is easy to be sintered and generates a crystal phase with non-photocatalytic activity, so that the catalytic activity is influenced, and the problem that the titanium dioxide is easy to run off even if the titanium dioxide is roasted at high temperature, so that the activity stability of the catalyst is influenced; thirdly, the ceramic carrier is also prone to have a problem of uneven distribution when carrying titanium dioxide, thereby further affecting the catalytic activity and stability thereof.
Disclosure of Invention
In order to overcome the defects in the prior art, the invention provides a photocatalytic unit and a photocatalytic method thereof. When the photocatalytic unit is used for purifying gas, the photocatalytic unit has good activity and stability.
A first aspect of the present invention provides a photocatalytic unit comprising:
the photocatalyst is a foamed ceramic carrier loaded with TiO2The photocatalyst comprises a foamed ceramic carrier and TiO distributed on the surface of the foamed ceramic carrier2The crystal grain, wherein the foamed ceramic carrier comprises foamed ceramic and composite oxide, the foamed ceramic is an open-cell foam structure, the pore edges of the foamed ceramic contain three-dimensional through micron-sized pore channels, and the composite oxide is distributed on the surfaces of the pore edges and in the pore channels;
and a light source device having a light emitting portion facing the photocatalyst.
The photocatalyst adopts a photocatalyst plate, the ultraviolet light source device adopts an ultraviolet LED lamp panel, the ultraviolet LED lamp panels are arranged on one surface or two surfaces of the photocatalyst plate, and further, the ultraviolet LED lamp panels are symmetrically arranged on the two surfaces of the photocatalyst plate. The photocatalyst plate and the ultraviolet LED lamp panel are arranged in parallel. The distance between the photocatalyst plate and the ultraviolet LED lamp panel is 0-10 cm, further 0-5 cm, and preferably 0.5-3.5 cm. Further, the thickness of the photocatalyst plate can be 0.3-3.0 cm.
In the ultraviolet light source device, the ultraviolet LED lamp panel comprises a substrate and a plurality of LED ultraviolet light-emitting particles arranged on the substrate, namely a Uv-LED point light source. The wavelength of ultraviolet light emitted by the ultraviolet LED lamp is 280-390 nm, and the ultraviolet light can be single wavelength or mixed wavelength, and preferably is single wavelength, such as 365 nm.
In the ultraviolet light source device, the LED ultraviolet light-emitting particles on the ultraviolet LED lamp panel can be arranged in an array form, and the vent holes can be arranged between adjacent arrays or not.
The substrate can be in a fence type, namely LED ultraviolet light-emitting particles which can be arranged in an array mode are arranged on the fence strips, and vent holes are formed among the fence strips. The ultraviolet LED lamp plate can set up the LED lamp simultaneously, also can both sides set up the LED lamp.
In the photocatalysis unit, N photocatalyst boards are arranged, ultraviolet LED lamp panels are arranged on two sides of each photocatalyst board and are arranged in parallel, wherein N is an integer larger than or equal to 1. The ultraviolet LED lamp panels arranged between the two adjacent photocatalyst boards are back to back and arranged on the two ultraviolet LED lamp panels of the single-sided LED lamp, and one ultraviolet LED lamp panel of the double-sided LED lamp can be selected.
The photocatalytic unit also comprises a fixing frame for fixing the photocatalyst plate and the ultraviolet LED lamp plate.
The foamed ceramic carrier of the invention loads TiO2In the photocatalyst, TiO distributed on the surface of the foamed ceramic carrier2Crystal grain of 5 to 50 μm TiO2The crystal grain accounts for more than 70%, preferably more than 80%, and more preferably TiO with the grain diameter of 15-45 μm2The crystal grains account for 70% or more, preferably 80% or more.
The foamed ceramic carrier of the invention loads TiO2In the photocatalyst, TiO is used as the reference based on the weight of the catalyst2The total content of (A) is 5 to 40%, preferably 8 to 35%.
The foamed ceramic carrier of the invention loads TiO2In the photocatalyst, the weight of the titanium dioxide contained in the composite oxide in the foamed ceramic carrier accounts for the weight of TiO in the catalyst 25 to 50 percent of the total weight.
The foamed ceramic carrier of the invention loads TiO2In the photocatalyst, the TiO2Mainly anatase type.
The foamed ceramic carrier of the invention loads TiO2In the photocatalyst, at least a part of the composite oxide is embedded in and/or penetrates through the pores.
The foamed ceramic carrier of the invention loads TiO2In the photocatalyst, theThe composite oxide comprises alumina and titanium dioxide, can be a homogeneously distributed composite oxide or a heterogeneously distributed composite oxide, and preferably the content of titanium dioxide on the surface of the carrier is higher than that in the interior of the carrier. The composite oxide accounts for 10-50% of the weight of the foamed ceramic carrier, and the weight content of titanium oxide in the composite oxide is 10-90%.
The foamed ceramic carrier of the invention loads TiO2In the photocatalyst, the alumina in the composite oxide is preferably gamma-Al2O3The composite oxide obtained by low-temperature roasting is further preferably adopted, and the roasting temperature of the low-temperature roasting is 400-700 ℃, and is preferably 450-700 ℃.
The foamed ceramic carrier of the invention loads TiO2In the photocatalyst, the foamed ceramic can be conventional foamed ceramic used for photocatalyst carriers, and the composition of the foamed ceramic can comprise one or more of alumina, zirconia, silicon carbide and silicon oxide, and preferably comprises alumina, wherein the alumina is α -Al2O3。
The foamed ceramic carrier of the invention loads TiO2In the photocatalyst, the open porosity of the foamed ceramic is 40-90%, preferably 60-80%, the diameter of a pore of a foam pore is 1-5 mm, the pore density is 8-60 ppi, and preferably 8-30 ppi.
The foamed ceramic carrier of the invention loads TiO2In the photocatalyst, the pore edges of the foamed ceramic are provided with micron-sized pore channels which are communicated in a three-dimensional way. The pore volume of the foamed ceramic is 0.1-0.5 mL/g, the pore volume occupied by the pore diameter of less than 20 mu m is less than 20% of the total pore volume, the pore volume occupied by the pore diameter of 20-80 mu m is 50-95% of the total pore volume, and the pore volume occupied by the pore diameter of more than 80 mu m is less than 10% of the total pore volume. The pore volume and the pore distribution of the foamed ceramic are micropore parameters measured by a mercury intrusion method. The outer surface of the foamed ceramic is provided with micron-sized pore openings which are uniformly distributed, and the diameters of the pore openings can be 1-100 mu m.
The foamed ceramic carrier of the invention loads TiO2In the photocatalyst, the composite oxide may further contain silicon and zirconiumAnd the content of the modifying auxiliary agent, such as magnesium, calcium, manganese and the like, is less than 15 percent of the weight of the foamed ceramic carrier in terms of oxide.
The foamed ceramic carrier of the invention loads TiO2A method of preparing a photocatalyst, comprising:
(1) preparing titanium sol;
(2) immersing the foamed ceramic carrier into the titanium sol obtained in the step (1) for slurry coating, removing excessive slurry, drying,
(3) repeating the dipping process for 0-5 times, preferably 1-4 times;
(4) and (4) carrying out heat treatment on the material obtained in the step (3) to obtain the photocatalyst.
The preparation method of the foamed ceramic carrier in the step (2) comprises the following steps: and (3) soaking the foam ceramic into the composite oxide precursor slurry to prepare the foam ceramic carrier.
In the preparation method of the foamed ceramic carrier, the composite oxide precursor slurry comprises the following components: nano titanium dioxide powder, alumina dry glue powder, peptizing acid, kaolin and water, wherein the nano titanium dioxide powder comprises the following components in percentage by weight: the alumina dry glue powder is calculated by alumina: peptizing acid: kaolin: the weight ratio of water is 1-9: 10: 1-5: 0.1 to 0.7: 3.0-10.0, wherein the alumina dry glue powder is dry powder obtained by drying aluminum hydroxide precipitate and can be prepared by a conventional neutralization method, an alcoholysis method and the like. The peptization acid can be one or more of inorganic acids such as nitric acid, hydrochloric acid and the like. Polyethylene glycol is preferably added into the composite oxide precursor slurry, and the addition amount of the polyethylene glycol accounts for 1-3% of the weight of the composite oxide precursor slurry. The molecular weight of the polyethylene glycol is 200-4000. The particle size of the nano titanium dioxide powder is less than 100nm, and preferably 10-100 nm.
In the preparation method of the foamed ceramic carrier, the method for impregnating the composite oxide precursor slurry by the foamed ceramic can adopt a vacuum impregnation method, and can adopt one or more times of impregnation, preferably multiple times of impregnation, when multiple times of impregnation are adopted, the composite oxide precursor slurry can be the same or different, and the content of the nano titanium dioxide in the slurry subjected to the subsequent impregnation is preferably higher than that in the slurry subjected to the prior impregnation. After each impregnation, the excess slurry is removed, the slurry in the large pore passage is removed by blowing, and then the drying treatment is carried out. And finally, drying for the first time and roasting to obtain the foamed ceramic carrier. The drying can be carried out at room temperature, and then the drying is carried out for 4-24 hours at the temperature of 40-90 ℃. The roasting can be performed in multiple stages by adopting a temperature programming mode, wherein the roasting is performed for 1-8 hours at 200-300 ℃, then for 1-6 hours at 400-700 ℃, preferably for 2-8 hours at 200-300 ℃, and for 2-5 hours at 450-700 ℃.
In the preparation method of the foamed ceramic carrier, the composite oxide precursor slurry used for the last impregnation is preferably prepared by mixing the nano titanium dioxide and the polyethylene glycol, and then mixing the mixture with the alumina dry glue powder, peptizing acid and water, so that at least part of the polyethylene glycol enters the nano titanium dioxide, more surfaces of the nano titanium dioxide are exposed outside the carrier in the subsequent treatment process, an easily enriched area is formed, the post-loaded titanium dioxide is more easily distributed around the nano titanium dioxide, the dispersity and the dispersion amount of the titanium dioxide on the surface of the carrier are improved, the size of titanium dioxide crystal grains can be better controlled, the firmness of the titanium dioxide in the catalyst is improved, and the activity and the stability of the catalyst are further improved.
The foamed ceramic carrier of the invention loads TiO2In the preparation method of the photocatalyst, the titanium sol in the step (1) can be prepared by a conventional method, and preferably, the following method is adopted: the titanium oxide precursor is dissolved in an organic solvent and mixed uniformly to prepare a titanium sol. The titanium oxide precursor may be titanium (IV) acetylacetonate. Preferably, carboxymethyl cellulose is added in the mixing process, and the molar ratio of the addition amount of the carboxymethyl cellulose to the titanium atoms is 1-7: 100, respectively; wherein the organic solvent is lower alcohol, such as C1-C5 alcohol, preferably one or more of methanol, ethanol and propanol, and more preferably isopropanol. The molar concentration of titanium in the titanium sol is 0.5-4.0 mol/L.
The foamed ceramic carrier of the invention loads TiO2In the preparation method of the photocatalyst, the catalyst in the step (2) is usedThe pulp and the excess pulp can be removed by a conventional method, such as pulp hanging by an immersion method, normal pressure immersion or vacuum immersion, and excess pulp is removed by extrusion by a rolling method.
The foamed ceramic carrier of the invention loads TiO2In the preparation method of the photocatalyst, the drying in the step (2) is drying for 4-24 hours at 50-95 ℃.
The foamed ceramic carrier of the invention loads TiO2In the preparation method of the photocatalyst, the heat treatment conditions in the step (4) are as follows: in the presence of water vapor and/or inert gas, roasting in sections, namely roasting at 200-300 ℃ for 3-8 hours, then roasting at 400-750 ℃ for 1-6 hours, preferably roasting at 200-300 ℃ for 3-8 hours, and roasting at 450-700 ℃ for 2-5 hours. The inert gas may be nitrogen.
The photocatalyst prepared by the method adopts an open-cell foam structure as a foam ceramic carrier, three-dimensional through micron-sized pore channels are distributed in pore edges of the foam ceramic, composite oxides are distributed on the surfaces of the pore edges and in the pore channels of the foam ceramic, at least one part of the composite oxides are embedded and/or penetrated through the pore channels, and the main crystal phase of the composite oxides is gamma-Al2O3On one hand, the connectivity of the pore passages of the open-pore foamed ceramic is fully utilized, on the other hand, the micron-sized pore passages in the pore edges are fully utilized, the composite oxide is embedded or penetrated in the direction of micropores, not only can the strength of the foamed ceramic be enhanced, and larger external specific surface area is provided, but also when titanium sol is subsequently utilized to load titanium dioxide, low-temperature roasting can be adopted, the growth and aggregation of titanium dioxide grains can be easily carried out on the basis of the composite oxide, the micron-sized grains with uniformly distributed and high-activity phases are formed, the base parts of the micron-sized grains are integrated with a foamed ceramic carrier, and TiO can be improved2The firmness of the photocatalyst is improved, and the stability of the photocatalyst is improved.
When the method of the invention is used for preparing the photocatalyst, the heat treatment is preferably segmented heat treatment by adopting water vapor and/or inert gas to promote proper TiO2Grain growth, and improvement of TiO2The dispersion degree of crystal grains on the surface of the carrier and the dispersion degree of the crystal grains on the surface of the carrierImprove TiO2The pore structure on the carrier promotes the contact area of water or gas and the photocatalyst easily, and simultaneously, the water or gas can pass through the photocatalyst quickly, thereby improving the treatment efficiency.
The photocatalytic unit of the present invention can be applied to existing electric appliances, such as air purifiers, refrigerators, air conditioners, etc., can also be applied to pipelines having a gas flow, such as exhaust air, ventilation equipment, exhaust gas discharge equipment, ventilation equipment, etc., and can also be used for transportation means, such as automobiles, cruise ships, submarines, airplanes, etc.
In a second aspect of the present invention, a photocatalytic method is provided, wherein the photocatalytic unit provided in the first aspect is adopted, and a gas to be purified passes through the photocatalytic unit, and a photocatalytic reaction is performed under the action of ultraviolet light and a catalyst, so as to obtain a purified gas.
In the photocatalysis method of the invention, the air inlet direction of the gas to be purified can be adjusted according to the requirement, and the air can be vertically fed, obliquely fed and the like.
In the photocatalysis method of the invention, N photocatalysis units can be adopted, and the N photocatalysis units can be arranged in parallel or in series. The plurality of photocatalytic units can be arranged in a flat plate shape or in a V shape. The arrangement modes of the N photocatalytic units can be the same or different.
In the photocatalysis method, the wavelength of ultraviolet light emitted by the ultraviolet LED lamp is 280-390 nm, which can be a single wavelength or a mixed wavelength, and is preferably a single wavelength, such as 365 nm.
In the photocatalysis method, the distance between the ultraviolet LED lamp panel and the photocatalyst plate is 0-10 cm. Further, the thickness is 0 to 5cm, preferably 0.5 to 3.5 cm. Further, the thickness of the photocatalyst plate can be 0.3-3.0 cm.
In the photocatalysis method, the radiation intensity on the photocatalyst plate is 0.01-500 mW/cm2Preferably 0.5-70 mW/cm2。
In the photocatalysis method of the invention, the gas to be purified is the gas containing volatile organic pollutants and/or sulfur and nitrogen-containing gas, such as indoor air, industrial gas and the like.
The photocatalysis method of the invention can remove various Volatile Organic Compounds (VOC) such as toluene, xylene, benzene, formaldehyde, acetaldehyde and homologues thereof, and also can remove various gases containing sulfur and nitrogen such as sulfur dioxide, hydrogen sulfide, ammonia and the like, and also can play a role in sterilization. The photocatalysis method can be used for purifying indoor air, industrial polluted gas, haze pollutants and the like, has good photocatalysis degradation performance, and has good application prospect.
Compared with the prior art, the photocatalysis unit and the photocatalysis method have the following advantages:
1. in the photocatalytic unit, the ultraviolet LED lamp panels are respectively arranged on two surfaces of the photocatalyst plate in parallel, the photocatalyst plate has a porous structure, and the ultraviolet LED lamp panels are provided with the ventilation holes, so that the gas fluidity and the catalytic efficiency are improved. The method of the invention adopts the photocatalysis unit, which not only has convenient installation, but also can achieve good gas purification effect.
2. The photocatalytic unit adopts a foamed ceramic carrier to load TiO2The photocatalyst has higher activity and stability.
For a unit amount of TiO2The smaller the crystallite size, the larger the specific surface area, the higher the catalytic activity, while the smaller the crystallite size, the less easy to support, and even if supported, the loss or coverage by inactive components is likely to occur, thereby affecting the activity and stability of the catalyst. The inventor finds that TiO through a large number of experiments2The crystal grain grows on the foam ceramic carrier in proper micron size and forms titanium dioxide with high active phase, which is favorable for decomposing organic matter under the catalysis of ultraviolet light and has better activity2The base of the crystal grain is integrated with the foamed ceramic carrier, and the TiO can be greatly improved by the structure2Fixed strength of the crystal grain, TiO2Crystal grains are not easy to lose, and TiO is also2The crystal grains have smooth grainsThe catalyst is not easily covered by inactive components, thereby greatly improving the stability of the catalyst.
3. The photocatalytic unit adopts a foamed ceramic carrier to load TiO2The photocatalyst adopts an open-cell foam structure, the surface of the pore edges and the inside of the pore channels of the foam ceramic are distributed with composite oxides, at least a part of the composite oxides are embedded in and/or penetrate through the pore channels, and the main crystalline phase of the composite oxides is gamma-Al2O3Has higher specific surface area, higher mechanical strength, higher aperture ratio and good adsorption and desorption performance, and simultaneously TiO2The crystal grains are distributed on the surface of the carrier in proper micron size, so that the contact chance with organic matters in water or gas is increased, and the TiO crystal grains are dispersed on the surface of the carrier in proper micron size2Not easy to lose, and has higher photocatalytic reaction activity and stability.
Drawings
FIG. 1 shows TiO supported on a foamed alumina-based carrier according to the present invention2Appearance of the photocatalyst;
FIG. 2 is a 500-fold enlarged view of a foamed alumina-based carrier A of the present invention by a scanning electron microscope;
FIG. 3 is an enlarged cross-sectional view of a photocatalyst according to the present invention; wherein, 1-TiO2Crystalline, 2-photocatalyst;
FIG. 4 is an XRD pattern of catalyst A obtained in example 1;
fig. 5 is a schematic view of an ultraviolet LED lamp panel according to an embodiment of the present invention, wherein the lamp panel includes a 3-ultraviolet LED lamp panel, a 31-substrate, 32-LED ultraviolet light emitting particles, and 33-ventilation holes;
FIG. 6 is a schematic view of a photocatalytic unit according to an embodiment of the present invention; the LED lamp comprises a light source, a light source and a light source, wherein 4-the light source is a photocatalysis unit, 3-the ultraviolet LED lamp;
FIG. 7 is a schematic view of a device for testing the performance of a photocatalytic unit of the catalyst of the present invention; wherein, 4-photocatalysis unit, 6-wind channel.
Detailed Description
The technical solution of the present invention is described in detail below with reference to examples, but the scope of the present invention is not limited by the examples. In the present invention, wt% is a mass fraction.
In the present invention, TiO is used2The crystal form of the crystal is measured by an XRD method, the instrument is a Rigaku D/max-2500X-ray diffractometer, a Cu target (0.15406nm) is adopted, graphite single crystal filtering is adopted, the operating tube voltage is 40kV, the tube current is 30mA, the scanning step length is 0.026 degrees, and the scanning range is 5-70 degrees.
In the present invention, TiO is on the surface of the catalyst2The size and distribution of crystal grains are measured by scanning electron microscope, observed by Hitachi X650 scanning electron microscope, operating voltage 15kV, nitrogen protection, and intermittent metal spraying.
In the catalyst of the present invention, TiO2The content of (B) is measured by a chemical method. In the support of the invention, TiO2The content of (B) is measured by a chemical method.
In the present invention, the open cell content of the organic foam and the foamed alumina-based support is determined according to ASTM D6226-2005, the pore density is expressed in ppi as the number of pores per inch of length.
As shown in fig. 5, the ultraviolet LED lamp panel 3 includes a substrate 31 and a plurality of ultraviolet LED light emitting particles 32 disposed on the substrate 31, and the substrate 31 is further provided with a vent 33. The shape of the lamp panel 3 may be square, and as an alternative embodiment, may also be square, circular, oval or other shapes. The shape of the vent hole 33 is rectangular. As an alternative embodiment, it may also be square, circular, oval or another shape. It should be understood that the shapes of the ultraviolet LED lamp panel 3 and the ventilation holes 33 can be determined by those skilled in the art according to the needs, the use place, the ventilation requirements, and the like, and the invention is not limited thereto. The ultraviolet LED luminescent particles 32 are arranged in an array on the substrate, with vents 33 between adjacent arrays. The substrate 31 is in a fence type, that is, the fence is provided with LED ultraviolet light emitting particles arranged in an array manner, and the ventilation holes 33 are formed between the fence. The number of the ultraviolet LED luminescent particles 32 can be adjusted according to the illumination intensity required by the photocatalyst.
As shown in fig. 6, the photocatalytic unit 4 includes an ultraviolet LED lamp panel 3, a photocatalyst plate 5, and a fixing frame 6. Wherein, two ultraviolet LED lamp panels 3 are respectively arranged on two sides of the photocatalyst plate 5 in parallel, and the photocatalyst plate 5 and the ultraviolet LED lamp panels 3 are fixed by adopting a fixing frame 6 to form a photocatalytic unit 4.
The ceramic foams used in the examples and comparative examples of the present invention were α -Al2O3The hole edges of the foamed ceramic are provided with three-dimensional through micron-sized pore channels, and the diameter of an orifice on the outer surface of the foamed ceramic is 1-100 micrometers.
The preparation process of the titanium sol is as follows: adding titanium (IV) acetylacetonate solid powder and carboxymethyl cellulose into isopropanol, and uniformly mixing to obtain a titanium sol with the titanium molar concentration of 3mol/L, wherein the molar ratio of the addition amount of the carboxymethyl cellulose to titanium atoms is 3: 100.
example 1
According to the nano titanium dioxide powder (the particle size is less than 100nm, the same is as below): alumina dry glue powder (in alumina): peptizing acid: kaolin: the weight ratio of water is 1.5: 10: 2.5: 0.4: 6.0, mixing to prepare composite oxide precursor slurry A1;
mixing nano titanium dioxide powder with polyethylene glycol 600, and then mixing with alumina dry glue powder, peptized acid and water according to the proportion of nano titanium dioxide powder: alumina dry glue powder (in alumina): peptizing acid: kaolin: the weight ratio of water is 3: 10: 2.5: 0.3: 6.5, mixing to prepare composite oxide precursor slurry A2, wherein the addition amount of the polyethylene glycol accounts for 2% of the weight of the composite oxide precursor slurry;
the length of the foamed ceramic is 15cm, the width of the foamed ceramic is 15cm, the thickness of the foamed ceramic is 1cm, the opening rate of the foamed ceramic is 70%, the diameter of a pore of the foamed ceramic is 1-5 mm, and the pore density of the foamed ceramic is 10 ppi. The pore volume of the foamed ceramic is 0.31mL/g, the pore volume occupied by the pore diameter of less than 20 micrometers is 10% of the total pore volume, the pore volume occupied by the pore diameter of 20-80 micrometers is 80% of the total pore volume, and the pore volume occupied by the pore diameter of more than 80 micrometers is 10% of the total pore volume. The pore volume and the pore distribution of the foamed ceramic are micropore parameters measured by a mercury intrusion method. Vacuum-impregnating the composite oxide precursor slurry A1 twice, drying for 6 hours at 70 ℃ after impregnation, then vacuum-impregnating the composite oxide precursor slurry A2, drying for 6 hours at 70 ℃, and roasting for two sections, namely roasting for 4 hours at 200 ℃ and roasting for 3 hours at 650 ℃ to obtain a foamed ceramic carrier A; wherein the composite oxide accounts for 30% of the weight of the foamed ceramic carrier;
soaking the foamed ceramic carrier A into titanium sol for vacuum impregnation and slurry hanging, removing excessive slurry, drying at 70 ℃ for 6 hours, repeating the impregnation twice, then carrying out sectional roasting in the presence of water vapor and nitrogen, namely roasting at 200 ℃ for 4 hours, and then roasting at 650 ℃ for 3 hours to obtain the foamed ceramic carrier supported TiO2And the photocatalyst A is a square plate. Wherein, in the catalyst A, TiO2The total content of (A) is 12%.
In the obtained catalyst A, TiO was measured by XRD2Mainly anatase, see fig. 3.
Foamed ceramic carrier loaded TiO2The graph of photocatalyst A magnified 500 times by optical microscope is shown in FIG. 1, and from FIG. 1, it can be seen that TiO is on the outer surface of the catalyst2Distributed in small grains.
Measuring the prepared TiO on the surface of the catalyst by adopting a scanning electron microscope2Crystal grains and obtaining TiO by a statistical method2Grain size, wherein a representative catalyst surface is selected, the statistical area is about 20000 μm2Statistical TiO2The total number of crystal grains exceeds 500. The TiO with the particle size of 5-50 mu m accounting for 90 percent and the particle size of 15-45 mu m on the surface of the catalyst A is measured2The grains account for about 84%.
Observing the cross section of the catalyst by a scanning electron microscope, TiO2The crystal grains 1 are partially embedded in the catalyst 2, the non-embedded parts are distributed on the outer surface of the catalyst 2, the schematic diagram is shown in figure 2, and the three-dimensional through micron-sized pore channels of the foam ceramic pore edges are embedded and penetrated with alumina and titanium oxide composite oxides through observation of the pore edge parts.
Example 2
According to the weight ratio of nano titanium dioxide powder: alumina dry glue powder (in alumina): peptizing acid: kaolin: the weight ratio of water is 2.0: 10: 2.0: 0.5: 6.0, preparing composite oxide precursor slurry B1;
mixing nano titanium dioxide powder with polyethylene glycol 600, and then mixing with alumina dry glue powder, peptized acid and water according to the proportion of nano titanium dioxide powder: alumina dry glue powder (in alumina): peptizing acid: kaolin: the weight ratio of water is 2.5: 10: 2.5: 0.3: 6.5, mixing to prepare composite oxide precursor slurry B2, wherein the addition amount of the polyethylene glycol accounts for 2% of the weight of the composite oxide precursor slurry;
taking square foamed ceramic, wherein the length is 15cm, the width is 15cm, the thickness is 1cm, the opening rate is 70%, the diameter of a pore is 1-5 mm, and the pore density is 20 ppi. The pore volume of the foamed ceramic is 0.26mL/g, the pore volume occupied by the pore diameter of less than 20 micrometers is 8 percent of the total pore volume, the pore volume occupied by the pore diameter of 20-80 micrometers is 82 percent of the total pore volume, and the pore volume occupied by the pore diameter of more than 80 micrometers is 10 percent of the total pore volume. The pore volume and the pore distribution of the foamed ceramic are micropore parameters measured by a mercury intrusion method. Vacuum-impregnating the composite oxide precursor slurry B1 twice in the foamed ceramic, drying for 6 hours at 70 ℃ after impregnation, then vacuum-impregnating the composite oxide precursor slurry B2, drying for 6 hours at 70 ℃, and roasting for two sections, namely roasting for 4 hours at 200 ℃ and roasting for 3 hours at 650 ℃ to obtain a foamed ceramic carrier B; wherein the composite oxide accounts for 30% of the weight of the foamed ceramic carrier;
soaking the foamed ceramic carrier B into the titanium sol for vacuum impregnation and slurry hanging, removing excessive slurry, drying for 6 hours at 70 ℃, repeatedly soaking twice, then carrying out sectional roasting in the presence of water vapor and nitrogen, namely roasting for 4 hours at 200 ℃, and then roasting for 3 hours at 650 ℃ to obtain the foamed ceramic carrier loaded TiO2And the photocatalyst B is a square plate. Wherein, in the catalyst B, TiO2The total content of (A) is 15%.
In the obtained catalyst B, TiO was measured by XRD2Mainly anatase.
Measuring the prepared TiO on the surface of the catalyst by adopting a scanning electron microscope2Crystal grains and obtaining TiO by a statistical method2Grain size, wherein a representative catalyst surface is selected, the statistical area is about 20000 μm2Statistical TiO2The total number of crystal grains exceeds 500. The TiO with the particle size of 5-50 mu m accounting for 88% on the surface of the catalyst B and the particle size of 15-45 mu m is measured2DieAbout 83 percent.
Observing the cross section of the catalyst by a scanning electron microscope, TiO2The crystal grains 1 are partially embedded in the catalyst 2, and the non-embedded part is distributed on the outer surface of the catalyst 2, and the schematic diagram is shown in figure 2; by observing the hole edge part, the aluminum oxide and titanium oxide composite oxide is embedded and penetrated in the three-dimensional through micron-sized pore canal of the foam ceramic hole edge
Example 3
According to the weight ratio of nano titanium dioxide powder: alumina dry glue powder (in alumina): peptizing acid: kaolin: the weight ratio of water is 1.0: 10: 2.0: 0.5: 6.0, and preparing composite oxide precursor slurry C1.
Mixing nano titanium dioxide powder with polyethylene glycol 600, and then mixing with alumina dry glue powder, peptized acid and water according to the proportion of nano titanium dioxide powder: alumina dry glue powder (in alumina): peptizing acid: kaolin: the weight ratio of water is 3.0: 10: 3.0: 0.3: 8.0, preparing composite oxide precursor slurry C2, wherein the addition amount of the polyethylene glycol accounts for 2.5 percent of the weight of the composite oxide precursor slurry;
the same procedure as in example 1 was repeated. Vacuum-impregnating the composite oxide precursor slurry C1 twice in the foamed ceramic, drying for 6 hours at 70 ℃ after impregnation, then vacuum-impregnating the composite oxide precursor slurry C2, drying for 6 hours at 70 ℃, and roasting for two sections, namely roasting for 3 hours at 220 ℃ and roasting for 4 hours at 600 ℃ to obtain a foamed ceramic carrier C; wherein the composite oxide accounts for 25% of the weight of the foamed ceramic carrier;
soaking the foamed ceramic carrier C into titanium sol for vacuum impregnation and slurry hanging, removing excessive slurry, drying at 70 ℃ for 6 hours, repeating the impregnation twice, then carrying out sectional roasting in the presence of water vapor and nitrogen, namely roasting at 220 ℃ for 3 hours, and then roasting at 600 ℃ for 4 hours to obtain the foamed ceramic carrier supported TiO2And the photocatalyst C is a square plate. Wherein, in the catalyst C, TiO2The total content of (A) is 18%.
In the obtained catalyst C, TiO was measured by XRD2Mainly anatase.
Measuring the prepared TiO on the surface of the catalyst by adopting a scanning electron microscope2Crystal grains and obtaining TiO by a statistical method2Grain size, wherein a representative catalyst surface is selected, the statistical area is about 20000 μm2Statistical TiO2The total number of crystal grains exceeds 500. The measured result shows that the TiO with the particle size of 5-50 mu m accounts for 89% and the particle size of 15-45 mu m on the surface of the catalyst C2The grains account for about 84%.
Observing the cross section of the catalyst by a scanning electron microscope, TiO2The crystal grains 1 are partially embedded in the catalyst 2, and the non-embedded part is distributed on the outer surface of the catalyst 2, and the schematic diagram is shown in figure 2; by observing the hole edge part, the alumina and titanium oxide composite oxide is embedded and penetrated in the three-dimensional through micron-sized pore channels of the foam ceramic hole edge.
Comparative example 1
The ceramic foam support A in example 1 was replaced with α -Al used in example 12O3Foamed ceramic is used as the carrier DA. Soaking the carrier DA in titanium sol for vacuum impregnation and slurry hanging, removing excessive slurry, drying at 70 ℃ for 6 hours, repeating the impregnation twice, then carrying out sectional roasting in the presence of water vapor and nitrogen, namely roasting at 200 ℃ for 4 hours, and then roasting at 650 ℃ for 3 hours to obtain the foamed ceramic carrier supported TiO2And (3) a photocatalyst DA. Wherein, in the catalyst DA, TiO2Is 10% of total content, TiO on the outer surface2The crystal grains are nano-scale titanium oxide.
Example 4
This embodiment is basically the same as embodiment 1, except that: adding no polyethylene glycol 600 into the composite oxide precursor slurry A2 to obtain the foamed ceramic carrier-supported TiO2And (3) a photocatalyst D. In the catalyst D, the mass content of titanium oxide was 12%.
In the obtained catalyst D, TiO was measured by XRD2Mainly anatase.
Measuring the prepared TiO on the surface of the catalyst by adopting a scanning electron microscope2Crystal grains and obtaining TiO by a statistical method2Grain size, wherein representative catalysis is selectedThe surface of the agent has a statistical area of about 20000 mu m2Statistical TiO2The total number of crystal grains exceeds 500. The TiO with the particle size of 5-50 mu m accounting for 85 percent and the particle size of 15-45 mu m on the surface of the catalyst D is measured2The grains account for about 81%.
Observing the cross section of the catalyst by a scanning electron microscope, TiO2The crystal grains are partially embedded into the catalyst, and the non-embedded parts are distributed on the outer surface of the catalyst, and the schematic diagram is shown in figure 2; by observing the hole edge part, the alumina and titanium oxide composite oxide is embedded and penetrated in the three-dimensional through micron-sized pore channels of the foam ceramic hole edge.
Example 5
This embodiment is basically the same as embodiment 1, except that: soaking the obtained carrier A into titanium sol for vacuum soaking and slurry hanging, removing excessive slurry, drying at 75 ℃ for 6 hours, and repeating the step for 1 time; then, in the presence of water vapor and nitrogen, single-stage roasting is adopted, namely roasting is carried out for 5 hours at 650 ℃, and the foamed ceramic carrier supported TiO is obtained2And (3) a photocatalyst E. In the catalyst E, the mass content of titanium oxide was 12.0%.
In the obtained catalyst E, TiO was measured by XRD2Mainly anatase.
Measuring the prepared TiO on the surface of the catalyst by adopting a scanning electron microscope2Crystal grains and obtaining TiO by a statistical method2Grain size, wherein the statistical area is about 20000 μm2Statistical TiO2The total number of crystal grains exceeds 1000. The particle size of the catalyst E on the surface is 5-50 mu mTiO2TiO with grain size of 15-45 μm accounting for 84%2The grains account for about 80%.
Observing the cross section of the catalyst by a scanning electron microscope, TiO2The crystal grains are partially embedded into the catalyst, and the non-embedded parts are distributed on the outer surface of the catalyst, and the schematic diagram is shown in figure 2; by observing the hole edge part, the alumina and titanium oxide composite oxide is embedded and penetrated in the three-dimensional through micron-sized pore channels of the foam ceramic hole edge.
Example 6
The test is to test the photocatalytic performance of the photocatalyst A, wherein the test conditions are as follows:
(1) testing raw materials: air with toluene, xylene, benzene, ammonia, formaldehyde, acetaldehyde, sulfur dioxide, and hydrogen sulfide as contaminants was used as the test feed.
(2) Testing equipment: as shown in FIG. 6, the photocatalyst A is taken out to be made into a photocatalytic unit, and then the photocatalytic unit is fixed in an air duct with a fan of a corresponding specification to form the testing equipment, as shown in FIG. 7. The parameters of the photocatalyst A and the LED lamp are set as follows:
the photocatalyst A is plate-shaped: the length is 15cm, the width is 15cm, and the thickness is 1 cm;
the ultraviolet LED lamp panel comprises a substrate and 48 LED ultraviolet light-emitting particles on the substrate, the LED ultraviolet light-emitting particles are evenly distributed on the substrate in an array mode, 8 LED ultraviolet light-emitting particles are distributed on each array, 6 LED ultraviolet light-emitting particles are distributed on each array, and the substrate is in a fence shape as shown in figure 5. The ultraviolet LED luminescent particles face the photocatalyst A, the wavelength of light emitted by the ultraviolet LED luminescent particles is 365nm ultraviolet light, the length of the substrate is 15cm, the width of the substrate is 15cm, the two ultraviolet LED lamp panels are placed on two sides of the photocatalyst A in parallel, the distance between the two ultraviolet LED lamp panels is 2cm, and the intensity of single-side ultraviolet light on the photocatalyst A reaches 10m W/cm2；
The cross section of the air duct is square, and the photocatalyst unit is hermetically placed in the air duct;
(3) test method and test conditions: preparing a sample experiment chamber and a blank experiment chamber;
place the test equipment at 1m3And sealing the sample experiment chamber, and filling pollutants into the experiment chamber. Starting the test equipment and the LED lamp, wherein the feeding speed is 0.5L/min, the test temperature is 26 ℃, the normal pressure is realized, the test time is 1 hour, and the results are shown in Table 1;
the blank experiment chamber and the sample experiment chamber are operated differently by only starting the test equipment and not starting the LED lamp, and the results are shown in table 1;
(4) the detection of the pollutant acetaldehyde is carried out according to GB/T18883-2002, the detection method of the benzene and the benzene series is carried out according to GB/T11737-1989, and the detection method of the formaldehyde is carried out according to GB/T18204.26-2000;
(5) the results of the catalyst sterilization test using a staphylococcus albus-containing gas as a raw material are shown in table 3.
Table 1 results of contaminant detection using catalyst a prepared in example 1
Examples 7 to 10
The detection method for contaminants purified and the detection method for sterilization were the same as in example 6 except that the catalyst samples were replaced with the catalysts B to E prepared in examples 2 to 5, respectively, and the results are shown in tables 2 and 3.
Comparative example 2
The detection method for contaminants purified and the detection method for sterilization were the same as in example 6 except that the catalyst sample was replaced with the catalyst DA prepared in comparative example 1, and the results are shown in tables 2 and 3.
Table 2 results of contaminant detection in the purification of catalyst prepared in examples 2 to 5 and comparative example 1
TABLE 3 results of the sterilization test using the catalysts prepared in examples and comparative examples
| Catalyst numbering | Testing microorganisms | Treatment time, 0h | Treatment time, 1h | Removal Rate (%) |
| Catalyst A | White colourStaphylococcus aureus | 6.5×104 | 85 | 99.87 |
| Catalyst B | Staphylococcus albus | 6.5×104 | 97 | 99.85 |
| Catalyst C | Staphylococcus albus | 6.5×104 | 92 | 99.86 |
| Catalyst D | Staphylococcus albus | 6.5×104 | 101 | 99.84 |
| Catalyst E | Staphylococcus albus | 6.5×104 | 103 | 99.84 |
| Catalyst DA | Staphylococcus albus | 6.5×104 | 108 | 99.83 |
Example 11
This example is a catalyst stability test.
Putting the catalyst A into a container provided with ultrasonic waves, wherein the ultrasonic treatment conditions are as follows: the volume ratio of water to catalyst is 4: 1, the ultrasonic frequency is 30kHz, the power is 20W/L according to the volume of the solution, the temperature is 30 ℃, the treatment frequency is 5 times, each treatment time is 30min, then the catalyst A is used for the photocatalytic performance test, the test method is the same as the example 6, and the result shows that the removal rate of pollutants in each test is reduced, the reduction rate is less than 1 percent, and the removal rate of staphylococcus albus is 99.01 percent.
Examples 12 and 13
The stability of catalysts B and C was tested as in example 11, resulting in a reduction in the removal of each tested contaminant of less than 1.5% and a reduction in the removal of Staphylococcus albus of less than 1.5%. Examples 14 and 15
The stability of catalysts D and E was tested as in example 11, resulting in a reduction in the removal of each contaminant tested, between 2% and 3%, and about 2% reduction in the removal of Staphylococcus albus.
Comparative example 3
The stability of catalyst DA was tested as in example 11, and as a result, the removal rate of each contaminant tested was reduced to a level of 10% or more, and the removal rate of Staphylococcus albus was 84%.
Example 16
In the same manner as example 6, except that "two ultraviolet LED lamp panels in the test condition (2) were placed in parallel on both sides of the photocatalyst A plate at an interval of 2cm, and the intensity of single-sided ultraviolet light on the photocatalyst A reached 10m W/cm2"; the method is characterized in that two ultraviolet LED lamp panels are arranged on two sides of a photocatalyst A plate in parallel at an interval of 5cm, and the single-side ultraviolet intensity on the photocatalyst A reaches 0.8mW/cm2", the results are shown in Table 4.
Table 4 example 16 test results for decontamination of contaminants
Claims (12)
1. A photocatalytic unit, comprising:
the photocatalyst is a foamed ceramic carrier loaded with TiO2The photocatalyst comprises a foamed ceramic carrier and a composite oxide, wherein the foamed ceramic is in an open-cell foam structure, the pore edges of the foamed ceramic contain three-dimensional through micron-sized pore channels, and the composite oxide is distributed on the surfaces of the pore edges and in the pore channels;
an ultraviolet light source device having a light emitting portion facing a photocatalyst.
2. A photocatalytic unit according to claim 1, characterized in that: the photocatalyst adopts a photocatalyst plate, the ultraviolet light source device adopts an ultraviolet LED lamp panel, and one or two surfaces of the photocatalyst plate are provided with the ultraviolet LED lamp panels; further, the photocatalyst plate and the ultraviolet LED lamp panel are arranged in parallel; further, the distance between the photocatalyst plate and the ultraviolet LED lamp panel is 0-10 cm, and preferably 0.5-3.5 cm; further, the thickness of the photocatalyst plate is 0.3-3.0 cm.
3. A photocatalytic unit according to claim 2, characterized in that: the ultraviolet LED lamp panel comprises a substrate and a plurality of LED ultraviolet light-emitting particles arranged on the substrate; LED ultraviolet light-emitting particles on the ultraviolet LED lamp panel are arranged in an array form, and ventilation holes are arranged or not arranged between adjacent arrays; furthermore, the substrate is in a fence type, namely LED ultraviolet light-emitting particles which are arranged in an array mode are arranged on the fence strips, and vent holes are formed among the fence strips.
4. A photocatalytic unit according to claim 2, characterized in that: the photocatalysis unit in, set up N photocatalyst board, every photocatalyst board both sides set up ultraviolet LED lamp plate, ultraviolet LED lamp plate and photocatalyst board parallel arrangement, wherein N is more than or equal to 1's integer.
5. A photocatalytic unit according to claim 1, characterized in that: the photocatalysis unit in, still include fixed frame for fixed photocatalyst plate and ultraviolet LED lamp plate.
6. Photocatalytic unit according to claim 1, characterized in that the ceramic foam support carries TiO2In the photocatalyst, TiO distributed on the outer surface of the catalyst2Crystal grain of 5 to 50 μm TiO2The crystal grain accounts for more than 70%, preferably more than 80%, and more preferably TiO with the grain diameter of 15-45 μm2The crystal grains account for 70% or more, preferably 80% or more.
7. A photocatalytic unit according to claim 1 or 6, characterized in that TiO is based on the weight of the photocatalyst2The total content of the component (A) is 5-40%, preferably 8-35%, and the weight of titanium dioxide contained in the composite oxide in the foamed ceramic carrier accounts for the weight of TiO in the photocatalyst25 to 50 percent of the total weight; preferably, the TiO is2Mainly anatase type.
8. A photocatalytic unit according to claim 1, characterized in that: in the foamed ceramic carrier, at least one part of composite oxide is embedded into and/or penetrates through the pore; the composite oxide comprises alumina and titanium dioxide, the content of the titanium dioxide in the surface of the carrier is higher than that in the interior of the carrier, the composite oxide accounts for 10-50% of the weight of the foamed ceramic carrier, and the weight content of the titanium oxide in the composite oxide is 10-90%; the alumina in the composite oxide is gamma-Al2O3。
9. A photocatalytic unit according to claim 1, characterized in that the composition of the ceramic foam comprises alumina, said alumina being α -Al2O3(ii) a Preferably, the pore edges of the foamed ceramic have micron-sized pore channels which are communicated in three dimensions(ii) a Measured by a mercury intrusion method, the pore volume of the foamed ceramic is 0.1-0.5 mL/g, the pore volume with the pore diameter of less than 20 micrometers accounts for less than 20 percent of the total pore volume, the pore volume with the pore diameter of 20-80 micrometers accounts for 50-95 percent of the total pore volume, and the pore volume with the pore diameter of more than 80 micrometers accounts for less than 10 percent of the total pore volume; preferably, the outer surface of the foamed ceramic is provided with micron-sized pore openings which are uniformly distributed, and the diameter of each pore opening is 1-100 micrometers.
10. Photocatalytic unit according to claim 1, characterized by the fact that the ceramic foam has an open porosity of 40% to 90%, preferably 60% to 80%, a cell diameter of 1mm to 5mm and a pore density of 8 to 60ppi, preferably 8 to 30 ppi.
11. A photocatalytic method characterized by: using a photocatalytic unit according to any one of claims 1 to 10; wherein, the gas to be purified is subjected to photocatalytic reaction under the action of ultraviolet light and a photocatalyst through a photocatalytic unit to obtain the purified gas.
12. A photocatalytic method according to claim 11, characterized in that the ultraviolet LED lamp emits ultraviolet light with a wavelength of 280-390 nm, preferably with a single wavelength, such as 365 nm; the distance between the ultraviolet LED lamp panel and the photocatalyst plate is 0-10 cm, further 0-5 cm, and preferably 0.5-3.5 cm; the radiation intensity on the photocatalyst plate is 0.01-500 mW/cm2Preferably 0.5-70 mW/cm2。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811003021.3A CN110871058B (en) | 2018-08-30 | 2018-08-30 | Photocatalytic unit and photocatalytic method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811003021.3A CN110871058B (en) | 2018-08-30 | 2018-08-30 | Photocatalytic unit and photocatalytic method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110871058A true CN110871058A (en) | 2020-03-10 |
| CN110871058B CN110871058B (en) | 2022-12-23 |
Family
ID=69714950
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811003021.3A Active CN110871058B (en) | 2018-08-30 | 2018-08-30 | Photocatalytic unit and photocatalytic method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110871058B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113493350A (en) * | 2020-04-01 | 2021-10-12 | 翟宇学 | Photocatalytic foamed ceramic and preparation method and application thereof |
| WO2024079607A1 (en) * | 2022-10-10 | 2024-04-18 | Laboratori Fabrici Srl | Air purifier for a refrigerator |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1085608A (en) * | 1996-09-17 | 1998-04-07 | Toto Ltd | Photocatalytic hydrophilic member and its production |
| US20030050196A1 (en) * | 2001-07-16 | 2003-03-13 | Noritake Co., Limited | Photocatalyst compositions and methods for making the same |
| CN2598626Y (en) * | 2002-12-16 | 2004-01-14 | 天津大学 | Chemical laboratory waste gas absorption-photocatalytic degradation cleaning devie |
| CN102744049A (en) * | 2012-07-06 | 2012-10-24 | 长安大学 | Process for preparing TiO2 (titanium dioxide) film on aluminum-oxide foamed ceramic |
| CN102872892A (en) * | 2012-10-24 | 2013-01-16 | 浙江大学苏州工业技术研究院 | Foamed ceramic based photocatalytic component and preparation method thereof |
| US20170087534A1 (en) * | 2015-09-30 | 2017-03-30 | Toto Ltd. | Photocatalyst coated body |
| CN107308483A (en) * | 2017-08-16 | 2017-11-03 | 常州市武进区半导体照明应用技术研究院 | A kind of efficient photocatalyst device |
-
2018
- 2018-08-30 CN CN201811003021.3A patent/CN110871058B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1085608A (en) * | 1996-09-17 | 1998-04-07 | Toto Ltd | Photocatalytic hydrophilic member and its production |
| US20030050196A1 (en) * | 2001-07-16 | 2003-03-13 | Noritake Co., Limited | Photocatalyst compositions and methods for making the same |
| CN2598626Y (en) * | 2002-12-16 | 2004-01-14 | 天津大学 | Chemical laboratory waste gas absorption-photocatalytic degradation cleaning devie |
| CN102744049A (en) * | 2012-07-06 | 2012-10-24 | 长安大学 | Process for preparing TiO2 (titanium dioxide) film on aluminum-oxide foamed ceramic |
| CN102872892A (en) * | 2012-10-24 | 2013-01-16 | 浙江大学苏州工业技术研究院 | Foamed ceramic based photocatalytic component and preparation method thereof |
| US20170087534A1 (en) * | 2015-09-30 | 2017-03-30 | Toto Ltd. | Photocatalyst coated body |
| CN107308483A (en) * | 2017-08-16 | 2017-11-03 | 常州市武进区半导体照明应用技术研究院 | A kind of efficient photocatalyst device |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113493350A (en) * | 2020-04-01 | 2021-10-12 | 翟宇学 | Photocatalytic foamed ceramic and preparation method and application thereof |
| WO2024079607A1 (en) * | 2022-10-10 | 2024-04-18 | Laboratori Fabrici Srl | Air purifier for a refrigerator |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110871058B (en) | 2022-12-23 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Hosseini et al. | Technological applications of honeycomb monoliths in environmental processes: a review | |
| CN107185535B (en) | Matt aldehyde-removing catalyst, aldehyde-removing system containing catalyst and application of aldehyde-removing system | |
| CN101579622A (en) | Preparation method of activated carbon fiber photocatalysis net loaded with nano titanium dioxide | |
| CN110871058B (en) | Photocatalytic unit and photocatalytic method thereof | |
| CN110871059B (en) | Titanium dioxide photocatalyst and preparation method thereof | |
| CN106381682A (en) | Nano-TiO2/activated carbon fibrofelt three-dimensional porous material high in adsorption and photocatalytic performance, and preparation method thereof | |
| CN210729163U (en) | Device for photocatalytic degradation of organic waste gas | |
| CN110871060B (en) | Foamed ceramic carrier, titanium dioxide photocatalyst and preparation method thereof | |
| KR100992115B1 (en) | Manufacturing technique of ceramic filter for purification of indoor air pollution and ceramic filter module | |
| JPH09276706A (en) | Photocatalyst particle and its production | |
| JP2006081957A (en) | Catalyst for cleaning exhaust gas | |
| CN110871061B (en) | Photocatalytic unit and photocatalytic method thereof | |
| JP2006297348A (en) | Catalyst for clarifying exhaust gas | |
| CN108452851A (en) | A kind of supported bismuth tungstate photocatalyst and preparation method for air purification | |
| CN113318719B (en) | Photocatalytic unit and application thereof | |
| CN113318722B (en) | Photocatalyst, and preparation method and application thereof | |
| CN113318726B (en) | Photocatalyst with function of releasing negative oxygen ions and preparation method and application thereof | |
| KR20180081090A (en) | Polymer film production process purification catalyst and polymer film production process | |
| CN113318721B (en) | Photocatalysis unit with negative oxygen ion release function and application thereof | |
| CN114653356B (en) | Preparation method of lanthanum-doped cerium oxide catalyst material and formaldehyde-removing compound | |
| JP5801121B2 (en) | Porous ceramic, photocatalyst carrier and purification device | |
| KR20230167939A (en) | Ozone decomposing catalyst and method for fabricating the same | |
| JP2004313844A (en) | Harmful substance decomposing method | |
| JP2003144937A (en) | Silica gel molded body carried with titanium oxide photocatalyst and manufacturing method therefor | |
| TWI609718B (en) | Photocatalytic filter for degrading mixed gas and manufacturing method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address | ||
| CP03 | Change of name, title or address |
Address after: 272000 Workshop 1, Floor 1, Building A1, Zhongke Science and Technology Innovation Park, Intersection of Shanhe Road and Rongchang Road, Liuhang Street, High-tech Zone, Jining City, Shandong Province Patentee after: Zhongke Yuenengjing (Shandong) New Material Co.,Ltd. Address before: 511430 room 909, Tian'an science and technology innovation building, Panyu energy saving science and Technology Park, No. 555, North Panyu Avenue, Donghuan street, Panyu District, Guangzhou City, Guangdong Province Patentee before: GUANGDONG YUENENGJING ENVIRONMENTAL PROTECTION TECHNOLOGY Co.,Ltd. |