CN100348312C - Loaded type TiO2 photocatalyst using luminescent material as carrier, prepn. method and application thereof - Google Patents

Loaded type TiO2 photocatalyst using luminescent material as carrier, prepn. method and application thereof Download PDF

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Publication number
CN100348312C
CN100348312C CNB2005100224111A CN200510022411A CN100348312C CN 100348312 C CN100348312 C CN 100348312C CN B2005100224111 A CNB2005100224111 A CN B2005100224111A CN 200510022411 A CN200510022411 A CN 200510022411A CN 100348312 C CN100348312 C CN 100348312C
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tio
photochemical catalyst
benzene
luminescent material
carrier
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CN1792424A (en
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李硕
王唯诚
钟俊波
龚茂初
陈耀强
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Sichuan University
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Sichuan University
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Abstract

The present invention discloses a loaded TiO2 photocatalyst, which belongs to the category of a catalyst. Luminescent materials (SrAl2O4: Eu<2+> and Dy<3+>) are used as carriers of the catalyst. Trap levels are formed from the Dy<3+> and crystal lattices in a defect way in the SrAl2O4: Eu<2+> and Dy <3+>, under the irradiation of ultraviolet light the trap levels can capture photoproduction electrons of TiO2, and the compound rate of electrons and holes is reduced; thereby, the catalytic activity of the TiO2 photocatalyst is greatly enhanced. Compared with the catalytic conversion of pure TiO2 for gas phase organic pollutants, the loaded TiO2 photocatalyst has longer service life.

Description

A kind of is the supported titanium of carrier with the luminescent material 2Photochemical catalyst and preparation method and application
Technical field:
The invention belongs to the catalyst category, particularly a kind of with luminescent material SrAl 2O 4: Eu 2+, Dy 3+TiO for carrier 2The preparation of photochemical catalyst and the application aspect photocatalysis thereof.
Background technology:
Along with environmental pollution becomes increasingly conspicuous, air quality problems more and more is subjected to people's attention.The nineteen ninety U.S. " clean air act " amendment has been enumerated 189 kinds of toxic and harmfuls, and wherein major part is a volatile organic contaminant in the air.In the past few decades, people once were placed on the air pollution of external environment to main notice and administered, and in recent ten years, just recognized the health significance of room air.States such as Europe, North America, Japan since the 1980s just to the research work of indoor environmental quality, and China also makes a series of " IAQ standards " successively in last century end, with this foundation as evaluation room air pollution level.Have statistics to show, the organic pollutant category that detects in all kinds of indoor environments is kind surplus in the of 200 nearly, and some is poisonous in them, and some can induce an illness, carcinogenic or teratogenesis.According to detection data to China's part building room air, newly fit up the serious room of after stain, the peak concentration of formaldehyde can reach 0.8～1mg/m 3, surpass national standard limits value (0.0gmg/m 3) more than 10 times.In addition, indoor air-conditioning equipment, furniture, chemical ﹠ blended fabric etc. also give out many poisonous and harmful substances, as various hydro carbons, aldehyde, ketone, benzene, dimethylbenzene etc.Abominable room air brings serious harm to human beings'health.
Most of indoor pollutant is oxidable, and photocatalytic method is a most effectual way of removing pollutant.TiO 2Be to use maximum based semiconductor photochemical catalysts at present.Shen Hangyan, Tang Xinshuo are at " TiO 2Organic pollution in the fine catalyst photocatalytic degradation room air " studied TiO in " Hang Zhou college journal (natural science edition) " 1998,25 (4) 2The catalytic degradation performance of indoor organic pollutants such as PARA FORMALDEHYDE PRILLS(91,95), acetaldehyde, acetone, ortho-xylene.Su Wenyue, Fu XianZhi, Wei, but magnesium was then in that " bromomethane is at TiO 2On photocatalytic degradation research " investigated the TiO of sol-gel process preparation in " SCI " 2001,22 (2) 2Degraded CH 3The gas-phase photocatalysis behavior of Br all obtains significative results.Why various organic pollutions can be by TiO 2The photochemical catalyst catalytic degradation is because of TiO 2Have special electronic structure: valence band is full of, the full sky of conduction band and forbidden band broad, thereby the valence band electronics can be crossed the forbidden band and enter conduction band by ultraviolet excitation, produces corresponding hole simultaneously on valence band.Light induced electron and photohole can be moved to catalyst surface rapidly and very strong redox ability is arranged, and photohole can be captured the organic electronics that is adsorbed on catalyst surface, make the organic matter active oxidation that does not absorb incident light originally.Yet the life-span of light induced electron and photohole is very short, has just lost catalytic activity after the two is compound.Therefore, catch TiO 2By light induced electron behind the ultraviolet excitation or photohole, stop its life-span of its compound prolongation just to become raising TiO 2The key of photochemical catalyst catalytic activity.
At present, solution to this problem mainly contains: one, and to TiO 2Middle doped metal ion is as Fe 3+, Eu 3+, Co 3+Deng.Cai Banghong, Ye Xingnan, red, the high taste of happy English have carried out " mixing iron TiO 2The research of gas-phase photocatalysis degraded n-hexane " " chemistry circular " 2003,66 (11), Yang Qiujing, permitted to rely on oneself, thanked super, Xue Baoyong, Du Yaoguo, Zhang Jiahua and investigated then that " europium mixes to nano-TiO 2The influence of catalytic activity " " SCI " 2004,25 (9).Metal cations Fe 3+, Eu 3+, Co 3+Doping why can improve TiO 2The catalytic activity of photochemical catalyst, be because of its can be at TiO 2Form trap level in the lattice, catch TiO 2Light induced electron, reduced the compound of light induced electron and photohole.Yet, because metal cations Fe 3+, Eu 3+, Co 3+Light transmission poor, when its doping increases, will hinder TiO 2To the absorption of light and make TiO 2The raising of photochemical catalyst catalytic activity is subjected to certain limitation.Two, use TiO 2As precious metal elements such as supported carrier Au, Ag, Pt, Pd.Mao Liqun, Feng Caixia, Jin Zhensheng, Zhang Zhijun, Dang Hongxin are at " Au/TiO 2Preparation and Photocatalytic Property Towards Propylene thereof " " photographic science and photochemistry " 2005,23 (1), Liu Shouxin, Wang Yan, Li Haichao, Li Shirun " are carrying silver-colored photochemical catalyst Ag-TiO 2Synthetic and photocatalysis performance " result of study in " the Northeast Forestry University's journal " 2001,29 (6) shows, by TiO 2The Au that supports, Ag also can resemble the metal cations Fe of doping 3+, Eu 3+Become Deng equally and to catch TiO 2The trap of light induced electron, and improve catalytic activity thus.But equally also can shield TiO because of its light transmission difference 2To the absorption of light, influence the raising of catalyst quantum efficient.Three, use supported carrier TiO 2Select a kind of suitable carriers to finish to TiO 2Fixing, be photocatalysis worker's research direction always." the nano-TiO of Fang Youling, Zhao Wenkuan, Yin Shaohua 2Immobilization on the hollow ceramic microballoon and photocatalysis Decomposition octane " " applied chemistry " 1997,14 (2), " supported titanium of Shen Hangyan, Tang Xinshuo, Guan Minyuan, Qi Weijun 2The degradation property research of Preparation of catalysts and photocatalysis acetone steam " " Journal of Molecular Catalysis " 1999; 13 (6); Jiang Yijun; " glass tube carrying of titanium dioxide powder is to the photocatalytic effect of ethylene gas " " Dalian Polytechnic College journal " 2004 of Xiang Weidong; 23 (1); Hu Chun, the patent of invention of Wang Yizhong " preparation method of load type titania photocatalyst " application number 99102734.5, Lee's cinnabar, Shao Youlin, Liang Tongxiang, Tang Yaping, Tang Chun and patent of invention " photochemical catalyst of nano-carrier " application number 200410068963, study and disclose pottery respectively, glass, silica, the convex-concave rod, the effect of CNT/activated carbon complex carrier and load TiO 2After photocatalysis performance.In addition, the research report that also has variety carrier such as extra large sand, zeolite, high molecular polymer, metal.But these carriers or do not catch light induced electron or photohole improve TiO 2The function of photocatalytic activity (as pottery, glass, silica, convex-concave rod etc.), or resemble metal cations Fe again 3+, Eu 3+The same problem that has a light transmission difference with precious metal element Au, Ag (as CNT/activated carbon complex carrier etc.), therefore, also all exist and can not significantly improve TiO 2The defective of semiconductor light-catalyst catalytic activity.
Another major issue is TiO 2The inactivation of photochemical catalyst has had a strong impact on the service life of catalyst.Zhang Qiancheng, Zhang Fengbao, Zhang Guoliang, Zhang Xiaoping studied variable concentrations in the circulation light catalyst system and catalyzing " benzene is at TiO 2On the gas-phase photocatalysis reactivity worth " " China Environmental Science " 2003,23 (6), experiment shows, when the initial concentration of benzene is lower than 100mg/m 3The time, along with the carrying out of reaction, benzene concentration can constantly reduce; And the concentration of working as benzene reaches 300mg/m 3, then be difficult to observe the change in concentration of benzene.DengXingyi Yue Yinghong Gao Zi is also at " Gas-phase Photo-oxidation of Organic Compoundsover Nanosized TiO 2Photocatalysis by Various Preparations " Applied Catalysis BEnvironmental[J] in 2002,39 (2) comparatively detailed investigation the TiO of prepared in various methods in the circulation light catalyst system and catalyzing 2To organic catalytic oxidation.The result shows, when the content of benzene in the gas phase is 0.086%, and the 0.55g TiO that crosses with sulfuric acid treatment 2Degradation rate to benzene is 16.8%, and catalyst has just lost activity after 3 hours.
The objective of the invention is for a kind of like this carrier is provided: it can not only be finished TiO as common carrier 2Fixing, but also, can catch TiO because of its special crystal structure 2The light induced electron that under action of ultraviolet light, produces, stop the multiple of light induced electron and photohole and, because of itself being exactly the good transparency of a kind of illuminator tool, can not hinder and shield TiO again 2To the absorption of light, thereby improved TiO greatly 2The catalytic activity of photochemical catalyst.Carrier loaded thus photochemical catalyst also has than pure TiO 2Catalyzed conversion to gaseous-phase organic pollutant has longer service life.
This carrier is SrAl 2O 4: Eu 2+, Dy 3+SrAl 2O 4: Eu 2+, Dy 3+Be the second generation environmental friendliness long afterglow luminescence material of just developing the early 1990s in last century, wherein SrAl 2O 4Be matrix, Eu 2+Be the centre of luminescence, Dy 3+With SrAl 2O 4Lattice defect form various trap levels, can catch light induced electron.Its preparation technology is comparatively ripe, at present, is mainly used in fire-fighting evacuation Warning Mark system, the building decoration decoration, the town and country place names indicates and vehicle label, industry and fields such as instrument and meter, timepiece dial demonstration, with its as the carrier of catalyst then from not being reported.
Summary of the invention:
1. the invention provides a kind of supported titanium 2Photochemical catalyst.This carrier is luminescent material SrAl 2O 4: Eu 2+, Dy 3+
2. above-mentioned supported titanium 2The preparation technology of photochemical catalyst is: earlier a certain amount of butyl titanate is mixed with absolute ethyl alcohol, add the mixed solution of deionized water, nitric acid and absolute ethyl alcohol again, constantly stir, add luminescent material SrAl 2O 4: Eu 2+, Dy 3+, drying, roasting is cooled to room temperature preservation.
3. above-mentioned supported titanium 2TiO in the photochemical catalyst 2Load capacity be 1～6Wt%, preferred 2～4Wt%.
4. above-mentioned supported titanium 2Photochemical catalyst is used for the catalyzed conversion of gaseous-phase organic pollutant.
Advantage of the present invention is:
1. use luminescent material SrAl 2O 4: Eu 2+, Dy 3+Load TiO 2Photochemical catalyst is than pure TiO 2And the TiO of other material load 2Photochemical catalyst all has remarkable advantages.With pure TiO 2Photochemical catalyst is compared, and can not only make TiO 2Immobilization, prevent TiO when dynamic environment is used 2Carried secretly by air-flow and run off, and with pure TiO 2And and other supported titanium 2Photochemical catalyst is compared, and the high advantage of catalytic activity is all arranged.This is because of SrAl 2O 4: Eu 2+, Dy 3+Middle Dy 3+The trap level that forms with lattice defect can resemble metal cations Fe 3+, Eu 3+The same TiO that catches with precious metal element Au, Ag 2Light induced electron, stop the compound of light induced electron and photohole, in addition,, can not hinder and shield TiO because of itself being exactly a kind of illuminator tool transparency 2To the absorption of light, thereby improved TiO greatly 2The catalytic activity of photochemical catalyst.
2. use this supported titanium 2The life-span of photochemical catalyst catalyzed conversion gaseous-phase organic pollutant is far above pure TiO 2Life-span.
The specific embodiment:
Embodiment one:
1. prepare 20g luminescent material SrAl 2O 4: Eu 2+, Dy 3+Load contain 1Wt%TiO 2Loaded photocatalyst.Its preparation method is: accurately take by weighing the 0.8522g butyl titanate and mix with the 3.95mL absolute ethyl alcohol, add the mixed solution of the nitric acid and the 1.8mL absolute ethyl alcohol of 0.2mL deionized water, 0.2mL65%～68% again, constantly stir, add 20g luminescent material SrAl 2O 4: Eu 2+, Dy 3+, place 70 ℃ of drying with water baths, put in the Muffle furnace 450 ℃ of roastings 3 hours into, be cooled to room temperature preservation.
2. estimating the performance of this loaded photocatalyst, is to be the analog gas pollutant with benzene, carries out in a kind of static reaction device.Reaction unit is made up of a closed stainless steel cavity, total measurement (volume) 0.17m 3, the uviol lamp (dominant wavelength 253.7nm) of a little electric fan and three 10 watts is installed on the internal stent.Experimental temperature remains on 40 ℃, controls by outer four infrared lamps placing of reactor.During experiment, earlier photochemical catalyst is dispersed in that the gross area is 100cm in the reactor 2Aluminium foil on, again certain quantity of fluid benzene injecting reactor is made it volatilization, after absorption reached balance, the sampling and testing initial concentration was opened the ultra violet lamp photochemical catalyst and then every sample analysis half an hour.Initial concentration and reaction beginning back benzene concentration changing value all detect with gas chromatograph.
The initial concentration of gas-phase benzene is 1500mg/m 3The time, 20g luminescent material SrAl 2O 4: Eu 2+, Dy 3+Load contain 1Wt%TiO 2Loaded photocatalyst 3.5 hours be 30.9% to the degradation rate of benzene, catalysqt deactivation.
The initial concentration of gas-phase benzene is 1500mg/m 3The time, pure TiO 20.2g (preparation method is with supported titanium among the embodiment one 2The preparation of photochemical catalyst, just no carrier added luminescent material SrAl 2O 4: Eu 2+, Dy 3+) photochemical catalyst 1.5 hours was 9.6% to the degradation rate of benzene, catalysqt deactivation.
Embodiment two:
1. prepare 20g luminescent material SrAl 2O 4: Eu 2+, Dy 3+Load contain 2Wt%TiO 2Loaded photocatalyst.Its preparation method is: accurately take by weighing the 1.7044g butyl titanate and mix with the 3.0mL absolute ethyl alcohol, add the mixed solution of the nitric acid and the 1.5mL absolute ethyl alcohol of 0.4mL deionized water, 0.4mL65%～68% again, constantly stir, add 20g luminescent material SrAl 2O 4: Eu 2+, Dy 3+, place 70 ℃ of drying with water baths, put in the Muffle furnace 450 ℃ of roastings 3 hours into, be cooled to room temperature preservation.
2. estimate the performance of this loaded photocatalyst, reaction unit and evaluation method are with embodiment one.
The initial concentration of gas-phase benzene is 1500mg/m 3The time, 20g luminescent material SrAl 2O 4: Eu 2+, Dy 3+Load contain 2Wt%TiO 2Loaded photocatalyst 4 hours be 34.8% to the degradation rate of benzene, catalysqt deactivation.
The initial concentration of gas-phase benzene is 1500mg/m 3The time, pure TiO 20.4g (preparation method is with supported titanium among the embodiment two 2The preparation of photochemical catalyst, just no carrier added luminescent material SrAl 2O 4: Eu 2+, Dy 3+) photochemical catalyst 1.5 hours was 11.9% to the degradation rate of benzene, catalysqt deactivation.
The initial concentration of gas-phase benzene is 750mg/m 3The time, 20g luminescent material SrAl 2O 4: Eu 2+, Dy 3+Load contain 2Wt%TiO 2Loaded photocatalyst be 63.4% in 8 hours to the degradation rate of benzene, catalyst is inactivation not yet.
The initial concentration of gas-phase benzene is 750mg/m 3The time, pure TiO 20.4g (preparation method is with supported titanium among the embodiment two 2The preparation of photochemical catalyst, just no carrier added luminescent material SrAl 2O 4: Eu 2+, Dy 3+) photochemical catalyst 3 hours was 23.5% to the degradation rate of benzene, catalysqt deactivation.
Embodiment three:
1. prepare 20g luminescent material SrAl 2O 4: Eu 2+, Dy 3+Load contain 3Wt%TiO 2Loaded photocatalyst.Its preparation method is: earlier with embodiment one: 1. load 1Wt%TiO 2After, use embodiment two again: 1. do secondary load, put in the Muffle furnace 450 ℃ of roastings 3 hours into, be cooled to room temperature preservation.
2. estimate the performance of this loaded photocatalyst, reaction unit and evaluation method are with embodiment one.
The initial concentration of gas-phase benzene is 1500mg/m 3The time, 20g luminescent material SrAl 2O 4: Eu 2+, Dy 3+Load contain 3Wt%TiO 2Loaded photocatalyst 4 hours be 33.4% to the degradation rate of benzene, catalysqt deactivation.
The initial concentration of gas-phase benzene is 1500mg/m 3The time, pure TiO 20.6g (preparation method mixes with the 11.85mL absolute ethyl alcohol for accurately taking by weighing the 2.5566g butyl titanate, the mixed solution that adds the nitric acid and the 5.4mL absolute ethyl alcohol of 0.6mL deionized water, 0.6mL65%～68% again, stir, place 70 ℃ of drying with water baths, put in the Muffle furnace 450 ℃ of roastings 3 hours into) photochemical catalyst 2 hours was 13.7% to the degradation rate of benzene, catalysqt deactivation.
The initial concentration of gas-phase benzene is 750mg/m 3The time, 20g luminescent material SrAl 2O 4: Eu 2+, Dy 3+Load contain 3Wt%TiO 2Loaded photocatalyst be 60.7% in 8 hours to the degradation rate of benzene, catalyst is inactivation not yet.
The initial concentration of gas-phase benzene is 750mg/m 3The time, pure TiO 20.6g (preparation method mixes with the 11.85mL absolute ethyl alcohol for accurately taking by weighing the 2.5566g butyl titanate, the mixed solution that adds the nitric acid and the 5.4mL absolute ethyl alcohol of 0.6mL deionized water, 0.6mL65%～68% again, stir, place 70 ℃ of drying with water baths, put in the Muffle furnace 450 ℃ of roastings 3 hours into) photochemical catalyst 4 hours was 28.1% to the degradation rate of benzene, catalysqt deactivation.
Embodiment four:
1. prepare 20g luminescent material SrAl 2O 4: Eu 2+, Dy 3+Load contain 4Wt%TiO 2Loaded photocatalyst.Its preparation method is: with embodiment two: 1. after doing twice load continuously, put in the Muffle furnace 450 ℃ of roastings 3 hours into, be cooled to room temperature preservation.
2. estimate the performance of this loaded photocatalyst, reaction unit and evaluation method are with embodiment one.
The initial concentration of gas-phase benzene is 1500mg/m 3The time, 20g luminescent material SrAl 2O 4: Eu 2+, Dy 3+Load contain 4Wt%TiO 2Loaded photocatalyst 3.5 hours be 32.2% to the degradation rate of benzene, catalysqt deactivation.
The initial concentration of gas-phase benzene is 1500mg/m 3The time, pure TiO 20.8g (preparation method mixes with the 15.80mL absolute ethyl alcohol for accurately taking by weighing the 3.4088g butyl titanate, the mixed solution that adds the nitric acid and the 7.2mL absolute ethyl alcohol of 0.8mL deionized water, 0.8mL65%～68% again, stir, place 70 ℃ of drying with water baths, put in the Muffle furnace 450 ℃ of roastings 3 hours into) photochemical catalyst 2.5 hours was 14.8% to the degradation rate of benzene, catalysqt deactivation.
The initial concentration of gas-phase benzene is 750mg/m 3The time, 20g luminescent material SrAl 2O 4: Eu 2+, Dy 3+Load contain 4Wt%TiO 2Loaded photocatalyst be 58.6% in 8 hours to the degradation rate of benzene, catalyst is inactivation not yet.
The initial concentration of gas-phase benzene is 750mg/m 3The time, pure TiO 20.8g (preparation method mixes with the 15.80mL absolute ethyl alcohol for accurately taking by weighing the 3.4088g butyl titanate, the mixed solution that adds the nitric acid and the 7.2mL absolute ethyl alcohol of 0.8mL deionized water, 0.8mL65%～68% again, stir, place 70 ℃ of drying with water baths, put in the Muffle furnace 450 ℃ of roastings 3 hours into) photochemical catalyst 5 hours was 32.4% to the degradation rate of benzene, catalysqt deactivation.
Embodiment five:
1. prepare 20g luminescent material SrAl 2O 4: Eu 2+, Dy 3+Load contain 5Wt%TiO 2Loaded photocatalyst.Its preparation method is: earlier with embodiment one: 1. load 1Wt%TiO 2After, use embodiment two again: 1. after doing twice load more continuously, put in the Muffle furnace 450 ℃ of roastings 3 hours into, be cooled to room temperature preservation.
2. estimate the performance of this loaded photocatalyst, reaction unit and evaluation method are with embodiment one.
The initial concentration of gas-phase benzene is 1500mg/m 3The time, 20g luminescent material SrAl 2O 4: Eu 2+, Dy 3+Load contain 5Wt%TiO 2Loaded photocatalyst 3.5 hours be 30.1% to the degradation rate of benzene, catalysqt deactivation.
The initial concentration of gas-phase benzene is 1500mg/m 3The time, pure TiO 21.0g (preparation method mixes with the 19.75mL absolute ethyl alcohol for accurately taking by weighing the 4.2610g butyl titanate, the mixed solution that adds the nitric acid and the 9.0mL absolute ethyl alcohol of 1.0mL deionized water, 1.0mL65%～68% again, stir, place 70 ℃ of drying with water baths, put in the Muffle furnace 450 ℃ of roastings 3 hours into) photochemical catalyst 2.5 hours was 16.4% to the degradation rate of benzene, catalysqt deactivation.
Embodiment six:
1. prepare 20g luminescent material SrAl 2O 4: Eu 2+, Dy 3+Load contain 6Wt%TiO 2Loaded photocatalyst.Its preparation method is: with embodiment two: 1. after doing three loads continuously, put in the Muffle furnace 450 ℃ of roastings 3 hours into, be cooled to room temperature preservation.
2. estimate the performance of this loaded photocatalyst, reaction unit and evaluation method are with embodiment one.
The initial concentration of gas-phase benzene is 1500mg/m 3The time, 20g luminescent material SrAl 2O 4: Eu 2+, Dy 3+Load contain 6Wt%TiO 2Loaded photocatalyst 3.5 hours be 28.2% to the degradation rate of benzene, catalysqt deactivation.
The initial concentration of gas-phase benzene is 1500mg/m 3The time, pure TiO 21.2g (preparation method mixes with the 23.70mL absolute ethyl alcohol for accurately taking by weighing the 5.1132g butyl titanate, the mixed solution that adds the nitric acid and the 10.8mL absolute ethyl alcohol of 1.2mL deionized water, 1.2mL65%～68% again, stir, place 70 ℃ of drying with water baths, put in the Muffle furnace 450 ℃ of roastings 3 hours into) photochemical catalyst 3 hours was 18.5% to the degradation rate of benzene, catalysqt deactivation.

Claims (4)

1. supported titanium 2Photochemical catalyst is characterized in that: the carrier of described loaded photocatalyst is luminescent material SrAl 2O 4: Eu 2+, Dy 3+
2. supported titanium according to claim 1 2Photochemical catalyst is characterized in that: with this SrAl 2O 4: Eu 2+, Dy 3+TiO for carrier 2Photochemical catalyst is used for the catalyzed conversion of gaseous-phase organic pollutant.
3. supported titanium as claimed in claim 1 2The preparation method of photochemical catalyst is characterized in that: earlier a certain amount of butyl titanate is mixed with absolute ethyl alcohol, add the mixed solution of deionized water, nitric acid and absolute ethyl alcohol again, constantly stir, add luminescent material SrAl 2O 4: Eu 2+, Dy 3+, drying, roasting is cooled to room temperature preservation.
4. supported titanium according to claim 3 2The preparation method of photochemical catalyst is characterized in that: TiO 2Load capacity be 1～6Wt%.
CNB2005100224111A 2005-12-27 2005-12-27 Loaded type TiO2 photocatalyst using luminescent material as carrier, prepn. method and application thereof Expired - Fee Related CN100348312C (en)

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CN102225342A (en) * 2011-04-07 2011-10-26 烟台大学 N-TiO2/BaAl2O4: eu2+, dy3+composite photocatalyst and its preparation method and application
CN104119885A (en) * 2013-04-27 2014-10-29 财团法人纺织产业综合研究所 Wavelength-migrated composite light-accumulating powder as well as manufacturing method and application of wavelength-migrated composite light-accumulating powder
CN109046437B (en) * 2018-10-10 2022-02-08 安徽瑞和新材料有限公司 Photocatalyst capable of being used all day long, and preparation method and application thereof
CN115555003A (en) * 2022-09-20 2023-01-03 江西联锴科技有限公司 Silicon dioxide-rare earth composite photocatalytic material and preparation method and application thereof

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* Cited by examiner, † Cited by third party
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CN1393290A (en) * 2001-06-25 2003-01-29 中国科学院化学研究所 Air cleaning material and its preparing process and usage
CN1394674A (en) * 2002-06-27 2003-02-05 上海交通大学 Nano compound photocatalyst for cleaning air and its preparation method

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1393290A (en) * 2001-06-25 2003-01-29 中国科学院化学研究所 Air cleaning material and its preparing process and usage
CN1394674A (en) * 2002-06-27 2003-02-05 上海交通大学 Nano compound photocatalyst for cleaning air and its preparation method

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