CN104148102B - A kind of composite photo-catalyst for purification of volatile organic waste gas and its preparation method - Google Patents
A kind of composite photo-catalyst for purification of volatile organic waste gas and its preparation method Download PDFInfo
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- 239000007789 gas Substances 0.000 title claims abstract description 24
- 238000002360 preparation method Methods 0.000 title claims abstract description 19
- 239000010815 organic waste Substances 0.000 title claims abstract description 18
- 239000011941 photocatalyst Substances 0.000 title claims abstract description 13
- 239000002131 composite material Substances 0.000 title claims abstract description 8
- 238000000746 purification Methods 0.000 title claims abstract description 8
- 239000000919 ceramic Substances 0.000 claims abstract description 22
- ZKATWMILCYLAPD-UHFFFAOYSA-N niobium pentoxide Chemical compound O=[Nb](=O)O[Nb](=O)=O ZKATWMILCYLAPD-UHFFFAOYSA-N 0.000 claims abstract description 20
- 229910052878 cordierite Inorganic materials 0.000 claims abstract description 18
- JSKIRARMQDRGJZ-UHFFFAOYSA-N dimagnesium dioxido-bis[(1-oxido-3-oxo-2,4,6,8,9-pentaoxa-1,3-disila-5,7-dialuminabicyclo[3.3.1]nonan-7-yl)oxy]silane Chemical compound [Mg++].[Mg++].[O-][Si]([O-])(O[Al]1O[Al]2O[Si](=O)O[Si]([O-])(O1)O2)O[Al]1O[Al]2O[Si](=O)O[Si]([O-])(O1)O2 JSKIRARMQDRGJZ-UHFFFAOYSA-N 0.000 claims abstract description 18
- 229910003191 Nb-TiO2 Inorganic materials 0.000 claims abstract description 17
- 229910052681 coesite Inorganic materials 0.000 claims abstract description 15
- 229910052906 cristobalite Inorganic materials 0.000 claims abstract description 15
- 239000000377 silicon dioxide Substances 0.000 claims abstract description 15
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 15
- 229910000108 silver(I,III) oxide Inorganic materials 0.000 claims abstract description 15
- 229910052682 stishovite Inorganic materials 0.000 claims abstract description 15
- 229910052905 tridymite Inorganic materials 0.000 claims abstract description 15
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims abstract description 9
- 229910052710 silicon Inorganic materials 0.000 claims abstract description 9
- 239000010703 silicon Substances 0.000 claims abstract description 9
- 206010013786 Dry skin Diseases 0.000 claims abstract description 6
- 238000001035 drying Methods 0.000 claims abstract description 6
- 239000000203 mixture Substances 0.000 claims abstract description 6
- 239000002002 slurry Substances 0.000 claims abstract description 6
- 238000011068 loading method Methods 0.000 claims abstract description 3
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N titanium dioxide Inorganic materials O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims description 4
- 238000000227 grinding Methods 0.000 claims description 3
- 239000003054 catalyst Substances 0.000 abstract description 9
- 229910019660 Nb(OH)5 Inorganic materials 0.000 abstract description 8
- 239000005416 organic matter Substances 0.000 abstract description 7
- 238000005516 engineering process Methods 0.000 abstract description 4
- 230000015556 catabolic process Effects 0.000 abstract description 2
- 238000006731 degradation reaction Methods 0.000 abstract description 2
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 description 6
- XEKOWRVHYACXOJ-UHFFFAOYSA-N Ethyl acetate Chemical compound CCOC(C)=O XEKOWRVHYACXOJ-UHFFFAOYSA-N 0.000 description 6
- 230000008030 elimination Effects 0.000 description 4
- 238000003379 elimination reaction Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- WSFSSNUMVMOOMR-UHFFFAOYSA-N Formaldehyde Chemical compound O=C WSFSSNUMVMOOMR-UHFFFAOYSA-N 0.000 description 3
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 description 3
- 238000000498 ball milling Methods 0.000 description 3
- 238000007084 catalytic combustion reaction Methods 0.000 description 3
- 239000011248 coating agent Substances 0.000 description 3
- 238000000576 coating method Methods 0.000 description 3
- 229910017604 nitric acid Inorganic materials 0.000 description 3
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- 238000006555 catalytic reaction Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000001699 photocatalysis Effects 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 229910020692 Pd-TiO2 Inorganic materials 0.000 description 1
- 241000607479 Yersinia pestis Species 0.000 description 1
- 230000001154 acute effect Effects 0.000 description 1
- 231100000570 acute poisoning Toxicity 0.000 description 1
- 238000004887 air purification Methods 0.000 description 1
- 230000000711 cancerogenic effect Effects 0.000 description 1
- 231100000315 carcinogenic Toxicity 0.000 description 1
- 210000003169 central nervous system Anatomy 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 231100000739 chronic poisoning Toxicity 0.000 description 1
- 239000004567 concrete Substances 0.000 description 1
- 230000000593 degrading effect Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 239000010419 fine particle Substances 0.000 description 1
- 238000004817 gas chromatography Methods 0.000 description 1
- 230000036039 immunity Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 238000007146 photocatalysis Methods 0.000 description 1
- 210000004994 reproductive system Anatomy 0.000 description 1
- 210000002345 respiratory system Anatomy 0.000 description 1
- 239000011378 shotcrete Substances 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 238000003980 solgel method Methods 0.000 description 1
- 239000012855 volatile organic compound Substances 0.000 description 1
Abstract
For composite photo-catalyst and its preparation method of purification of volatile organic waste gas, by cordierite honeycomb ceramic carrier and Nb-TiO2��SmVO4��C3N4��Nb2O5��Ag2O��SiO2Composition, Nb-TiO2��SmVO4��C3N4��Nb2O5��Ag2O and SiO2Total loading amount is 20��100g/L of cordierite honeycomb ceramic carrier. By Nb-TiO2��SmVO4��C3N4��Nb(OH)5, AgOH is (with Ag2O counts), silicon sol is (with SiO2Meter) mass ratio be 50:30:8:1.9:0.1:10, be evenly coated in cordierite honeycomb ceramic carrier surface, and blow out slurries unnecessary in honeycomb ceramic carrier hole with high pressure gas, through 110 DEG C of dryings, 500 DEG C of obtained final products of roastings. This catalyst degradation volatile organic matter performance height, preparation technology is simple.
Description
Technical field
The present invention relates to a kind of composite photo-catalyst for purification of volatile organic waste gas and its preparation method, belong to the environmental catalysis material field of atmospheric environment protection.
Background technology
Volatile organic matter be cause topsoil mainly contain one of pest, also it is cause photochemical pollution, form the main source of fine particle (PM2.5), cause the exception (J.J.Spivey of mankind's central nervous system, respiratory system, immunity system, reproductive system etc., Ind.Eng.ChemRes1987,26:2165-2180), cause acute and chronic poisoning, carcinogenic and transgenation etc. Although, catalyticcombustion is extensively for the purification of volatile organic waste gas, but the working temperature of catalyticcombustion is generally more than 300 DEG C. Owing to catalytic combustion technology temperature is higher, be not suitable for the volatile organic waste gas of lower concentration, the process of indoor low concentration volatile organic matter. Owing to photocatalyst at room temperature works, therefore in process low concentration volatile organic matter field, there is unique advantage. But, the photochemical catalysis equipment of volatile organic waste gas it is crucial that photocatalyst.
At present, the degraded of photocatalyst research field mainly organic waste water, relatively less in volatile organic waste gas process field, catalyzer also mainly fine catalyst. But, fine catalyst cannot be used for the process of volatile organic waste gas, and catalyzer must load for this reason. Chinese invention patent CN103100368A discloses the preparation method of the integral catalyzer of a kind of VOCs that degrades, and prepares TiO by sol-gel method2While photocatalyst, with Pd to its modification, then by gunite by Pd-TiO2Load to porous ceramic surface, obtain catalyzer. Chinese invention patent CN1887416A discloses foamed nickel supported modified Nano TiO2Preparation method, catalyzer be used for degradation of formaldehyde and volatile organic matter. But, preparation method's more complicated of this catalyzer. Therefore, how to improve catalyst performance and simplify catalyst preparation process, be the emphasis of this field research.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of composite photo-catalyst for purification of volatile organic waste gas and its preparation method, and for solving this technical problem, the technical solution used in the present invention is:
For a composite photo-catalyst for purification of volatile organic waste gas, by cordierite honeycomb ceramic carrier and Nb-TiO2��SmVO4��C3N4��Nb2O5��Ag2O��SiO2Composition, Nb-TiO2��SmVO4��C3N4��Nb2O5��Ag2O and SiO2Total loading amount is 20��100g/L of cordierite honeycomb ceramic carrier.
The composite photo-catalyst of the present invention is by Nb-TiO2��SmVO4��C3N4��Nb(OH)5(with Nb2O5Meter), AgOH is (with Ag2O counts), silicon sol is (with SiO2Meter) it is 50:30:8:1.9:0.1:10 in mass ratio, evenly it is coated in cordierite honeycomb ceramic carrier surface, and blows out slurries unnecessary in honeycomb ceramic carrier hole with high pressure gas, through 110 DEG C of dryings, 500 DEG C of roastings.
Described Nb-TiO2Preparation method be according to mol ratio Ti:Nb=97:3, take corresponding TiO2With Nb (OH)5, mixed grinding is after 4 hours, 500 DEG C of air atmosphere roastings 4 hours.
The catalyzer adopting preparation method of the present invention to obtain has higher photocatalytic activity, and light-concentration volatile organic exhaust gas of effectively degrading, can be used for indoor air purification.
Embodiment
Below in conjunction with embodiment, the present invention made further concrete explanation, but the present invention is not limited to these embodiments.
Embodiment 1
(1)Nb-TiO2Preparation: according to mol ratio Ti:Nb=97:3, take corresponding TiO2With Nb (OH)5, mixed grinding is after 4 hours, 500 DEG C of air atmosphere roastings 4 hours.
(2) cordierite honeycomb ceramic carrier surface active composition load: according to Nb-TiO2��SmVO4��C3N4��Nb(OH)5(with Nb2O5Meter), AgOH is (with Ag2O counts), silicon sol is (with SiO2Meter) mass ratio be 50:30:8:1.9:0.1:10; Take Nb-TiO respectively2500g��SmVO4300g��C3N480g��Nb(OH)5(with Nb2O5Meter) 19g, AgOH be (with Ag2O counts) 1g, silicon sol is (with SiO2Meter) 100g, adding water to total mass is ball milling 4 hours after 2000g, then adds concentrated nitric acid and acidity is adjusted to pH=5.5. By cordierite honeycomb ceramic carrier (300 orders/in2) flood, and blow out slurries unnecessary in cordierite honeycomb ceramic carrier hole with high pressure gas. Then through 110 DEG C of dryings, 500 DEG C of roastings 4 hours. The content of catalyzer floating coat is 100g/L (calculating with the coating wt of 500 DEG C of roastings after 4 hours).
(3) catalyst activity evaluation carries out in photo catalysis reactor, and catalyzer is 100mm (length), 35mm (width), 5mm (height), and catalyst surface irradiates with a ultraviolet lamp tube, and ultraviolet ray intensity is 20mw/cm2. Air carries benzene or ethyl acetate is that (concentration of benzene is 30mg/m to simulation volatile organic waste gas3, or the concentration of ethyl acetate is 40mg/m3) by catalyzer, air flow quantity is 100ml/min. Before and after reaction, volatile organic matter concentration adopts gas-chromatography (FID) to analyze. The one way elimination rate of volatile organic waste gas is in table 1.
Embodiment 2
(1)Nb-TiO2Preparation method identical with embodiment 1.
(2) cordierite honeycomb ceramic carrier surface active composition load: according to Nb-TiO2��SmVO4��C3N4��Nb(OH)5(with Nb2O5Meter), AgOH is (with Ag2O counts), silicon sol is (with SiO2Meter) mass ratio be 50:30:8:1.9:0.1:10; Take Nb-TiO respectively2500g��SmVO4300g��C3N480g��Nb(OH)5(with Nb2O5Meter) 19g, AgOH be (with Ag2O counts) 1g, silicon sol is (with SiO2Meter) 100g, adding water to total mass is ball milling 4 hours after 4000g, then adds concentrated nitric acid and acidity is adjusted to pH=5.5. By cordierite honeycomb ceramic carrier (300 orders/in2) flood, and blow out slurries unnecessary in cordierite honeycomb ceramic carrier hole with high pressure gas. Then through 110 DEG C of dryings, 500 DEG C of roastings 4 hours. The content of catalyzer floating coat is 50g/L (calculating with the coating wt of 500 DEG C of roastings after 4 hours).
(3) catalyst performance testing method is identical with embodiment 1, and the one way elimination rate of volatile organic waste gas is in table 1.
Embodiment 3
(1)Nb-TiO2Preparation method identical with embodiment 1.
(4) cordierite honeycomb ceramic carrier surface active composition load: according to Nb-TiO2��SmVO4��C3N4��Nb(OH)5(with Nb2O5Meter), AgOH is (with Ag2O counts), silicon sol is (with SiO2Meter) mass ratio be 50:30:8:1.9:0.1:10; Take Nb-TiO respectively2500g��SmVO4300g��C3N480g��Nb(OH)5(with Nb2O5Meter) 19g, AgOH be (with Ag2O counts) 1g, silicon sol is (with SiO2Meter) 100g, adding water to total mass is ball milling 4 hours after 10000g, then adds concentrated nitric acid and acidity is adjusted to pH=5.5. By cordierite honeycomb ceramic carrier (300 orders/in2) flood, and blow out slurries unnecessary in cordierite honeycomb ceramic carrier hole with high pressure gas. Then through 110 DEG C of dryings, 500 DEG C of roastings 4 hours. The content of catalyzer floating coat is 20g/L (calculating with the coating wt of 500 DEG C of roastings after 4 hours).
(5) catalyst performance testing method is identical with embodiment 1, and the one way elimination rate of volatile organic waste gas is in table 1.
The one way elimination rate of the volatile organic waste gas of table 1 embodiment catalyzer
It thus is seen that the photocatalyst of the present invention is for the catalyticing purifying effect of volatile organic matter, as can be seen from Table 1, along with the increase of charge capacity, the performance of catalyzer improves. This catalyzer has the features such as preparation technology is simple, low cost of manufacture.
Claims (3)
1. the composite photo-catalyst for purification of volatile organic waste gas, it is characterised in that: by cordierite honeycomb ceramic carrier and Nb-TiO2��SmVO4��C3N4��Nb2O5��Ag2O��SiO2Composition, Nb-TiO2��SmVO4��C3N4��Nb2O5��Ag2O and SiO2Total loading amount is 20��100g/L of cordierite honeycomb ceramic carrier.
2. the preparation method of catalyzer described in claim 1, it is characterised in that: by Nb-TiO2��SmVO4��C3N4, with Nb2O5The Nb (OH) calculated5, with Ag2O calculate AgOH, with SiO2The mass ratio of the silicon sol calculated is 50:30:8:1.9:0.1:10, is evenly coated in cordierite honeycomb ceramic carrier surface, and blows out slurries unnecessary in honeycomb ceramic carrier hole with high pressure gas, through 110 DEG C of dryings, and 500 DEG C of obtained final products of roasting.
3. preparation method according to claim 2, it is characterised in that: described Nb-TiO2Preparation method be according to mol ratio Ti:Nb=97:3, take corresponding TiO2With Nb (OH)5, mixed grinding is after 4 hours, 500 DEG C of air atmosphere roastings 4 hours.
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| CN104549210A (en) * | 2014-12-22 | 2015-04-29 | 湖北盟科纸业有限公司 | Photocatalytic reagent and application on aluminized paper |
| CN105195221A (en) * | 2015-07-06 | 2015-12-30 | 阜阳师范学院 | Composite photocatalyst SiO2/g-C3N4 as well as preparation method and application thereof |
| CN105195203B (en) * | 2015-10-22 | 2017-10-20 | 江苏大学 | A kind of visible light-responded Nb2O5/g‑C3N4The preparation method and purposes of heterojunction material |
| CN111250134A (en) * | 2020-02-14 | 2020-06-09 | 郑州普利飞尔环保科技有限公司 | Modified TiO2Composite g-C3N4Visible light photocatalytic antibacterial ceramic and preparation method and application thereof |
| CN114011399A (en) * | 2021-11-08 | 2022-02-08 | 江苏理工学院 | Niobium compound photocatalyst and preparation method and application thereof |
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| EP0314057B1 (en) * | 1987-10-30 | 1992-06-03 | Degussa Aktiengesellschaft | Rhodium-free three-way catalyst |
| CN102702807A (en) * | 2012-06-14 | 2012-10-03 | 金华氟特催化科技有限公司 | Photo-catalytic composite coating and preparation method thereof |
| CN103240083A (en) * | 2013-05-16 | 2013-08-14 | 浙江师范大学 | Monolithic Pd catalyst for purifying industrial organic waste gas and preparation method thereof |
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| US4476246A (en) * | 1983-01-26 | 1984-10-09 | W. R. Grace & Co. | Doubly promoted platinum group metal catalysts for emission control |
| JP2001137655A (en) * | 1999-11-12 | 2001-05-22 | Fuji Photo Film Co Ltd | Waste gas treating method |
| CN101391207A (en) * | 2008-11-03 | 2009-03-25 | 成都理工大学 | Preparation method of niobium doped titanium dioxide photo-degradation catalyst filament |
| CN103041819B (en) * | 2013-01-17 | 2014-07-30 | 金华氟特催化科技有限公司 | Catalyst for fluoridation and preparation method for same |
| CN103861589B (en) * | 2014-03-12 | 2015-10-21 | 浙江师范大学 | For the mullite Pt-supported catalyst and preparation method thereof of purifying industrial organic waste gas |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0314057B1 (en) * | 1987-10-30 | 1992-06-03 | Degussa Aktiengesellschaft | Rhodium-free three-way catalyst |
| CN102702807A (en) * | 2012-06-14 | 2012-10-03 | 金华氟特催化科技有限公司 | Photo-catalytic composite coating and preparation method thereof |
| CN103240083A (en) * | 2013-05-16 | 2013-08-14 | 浙江师范大学 | Monolithic Pd catalyst for purifying industrial organic waste gas and preparation method thereof |
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