CN103464133A - Preparation and chlorination method of SrTiO3/TiO2 composite photocatalyst - Google Patents
Preparation and chlorination method of SrTiO3/TiO2 composite photocatalyst Download PDFInfo
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- CN103464133A CN103464133A CN201210185987XA CN201210185987A CN103464133A CN 103464133 A CN103464133 A CN 103464133A CN 201210185987X A CN201210185987X A CN 201210185987XA CN 201210185987 A CN201210185987 A CN 201210185987A CN 103464133 A CN103464133 A CN 103464133A
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- srtio3
- tio
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
Abstract
The invention relates to a preparation method and application of a novel photocatalysis material. First, SrTiO3 is synthesized by co-precipitation method, then the SrTiO3 is mixed into TiO2 by sol-gel method, and finally a novel composite photocatalyst is obtained by surface chlorination modification by use of impregnation method. The novel photocatalysis material has the characteristics of high catalytic activity, wide applicability and good stability. The gas phase photocatalytic performance of the novel photocatalysis material under ultraviolet conditions is greatly improved compared with that of pure TiO2. The novel photocatalysis material has a great potential in the aspects of air pollution control, water treatment and the like.
Description
Technical field
The present invention is a kind of preparation method of novel photocatalysis material, and the character that it has semiconductor heterostructure and surface chlorination, belong to photocatalysis technology, can be applicable to the fields such as atmosphere improvement, toxic gas processing, waste-water purification.
Background technology
The theme of current era, be converted to sustainable development from the development of predation formula, and environmental protection consciousness is rooted in the hearts of the people already.In numerous pollutant technology for eliminating, photocatalysis technology is cheap with it, reaction temperature and, the characteristics of highly versatile in the industry cycle gain great popularity.But it should be noted that present stage light-catalyzed reaction efficiency is lower, the requirement that does not also reach large-scale application, for example Japan has early just released with TiO several years ago
2photocatalysis technology is that (6:50-52), but occupation rate of market is low for Yao Enqin, chemistry and bioengineering, and repercussion is average for a series of products such as basic clarifier, ceramic tile.As can be seen here, improving photocatalytic activity is the most important thing.
Benzene is comparatively common a kind of in the municipal pollution organic gas, and its toxicity is higher, and long term exposure wherein can increase carcinogenic probability.The oxidation processes of benzene is the emphasis direction of research always, and the introducing of photocatalysis technology provides a kind of clean, gentle degraded mode for it especially.Yet, conventional Ti O
2the gas-phase photocatalysis performance a little less than, to constitutionally stable aromatic compound oxidation effectiveness not fully up to expectations, therefore the photocatalysis performance that how to improve the benzene oxidation reaction becomes study hotspot.
SrTiO
3that a class is with TiO
2semi-conducting material for foundational development goes out, (Yan Jian Hui, J.A.Com., 472 (2009) 429-433) have a wide range of applications at photodissociation aquatic products hydrogen and mineralization of organic material field.SrTiO
3can only be by ultraviolet excitation, energy gap is 3.4eV, with TiO
2close, but its conduction band position is higher, is subject to optical excitation, more easily produces free radical.Previous report mostly is for SrTiO
3the research of monomer, (Chia-Hao Chang, Materials Letters, 60 (1): 129-132) utilize the method for Cr doping, make SrTiO such as Chang
3occur visible light-respondedly, the degradation capability of methylenum careuleum is significantly improved, for expanding its light abstraction width, provide good thinking.(Takeshi Toshima, Cryst.Growth Des., 2008,8 (7): 2066-2069) by special crystal growth control method, prepared the Ca-Ti ore type SrTiO of many ribs stereochemical structure such as Takeshi
3, producing new characteristic aspect extinction characteristic, crystal structure.(RS Yuan, ACS Catal., 2011,1 (3): 200-206) studied the TiO that surperficial chlorine is modified such as Yuan
2and some titanium matrix composites, prove that it has significant lifting aspect photocatalytic degradation.This paper will be take the nano heterojunction theory as thinking, in conjunction with SrTiO
3with TiO
2can be with matching characteristic, build the compound material of the two, surface chlorination subsequently, to promoting the ultraviolet catalytic ability of this material to gas-phase benzene.
Summary of the invention
The object of the invention is to for conventional Ti O
2the deficiency of catalytic performance, based semiconductor hetero-junctions principle and surface chlorination mechanism, provide a kind of preparation method and application of Novel composite titanium based photocatalyst, solves that existing catalysis material performance is low, the defect of easy inactivation.
Photochemical catalyst of the present invention is a kind of SrTiO based on titanium dioxide
3/ TiO
2composite photocatalyst material, and, by the surface chlorination modification to composite, catalytic performance is further promoted.The present invention implements by following technical solution:
In mass ratio 18%, by SrTiO
3powder joins in 150ml titanium glue, vigorous stirring 24h, microwave drying; Muffle furnace 400-500 ℃ of sintering 3-5h, obtain SrTiO
3/ TiO
2composite photocatalyst material; Get the 1g compound and be immersed in the 2ml concentrated hydrochloric acid, in dark place sealing and standing 24h, place at the fume hood split shed subsequently, until hydrochloric acid volatilizees fully substantially, last 50-60 ℃ of oven dry gets final product.
The composite photocatalyst material the present invention relates to is mainly used in organic pollutant degradation, at aspects such as atmosphere pollution processing, earning of water, has huge potentiality.
The accompanying drawing explanation
The composite photo-catalyst XRD figure that Fig. 1-1 is synthesized of the present invention
The composite photo-catalyst TEM figure that Fig. 1-2 is synthesized of the present invention
Fig. 2 is the degradation curve of benzene vapour on the composite photo-catalyst of synthesized of the present invention
Fig. 3 is the degradation curve of methyl orange on the composite photo-catalyst of synthesized of the present invention
The specific embodiment
Embodiment 1:
SrTiO
3/ TiO
2composite photo-catalyst and chloride degraded benzene thereof.Experiment is usingd benzene as target contaminant, the photo-catalysis capability of new material in gas-phase reaction of research preparation.At first build benzene and purge generating means, with O
2for purge gas, gas flow is set as to 20ml/min, benzene concentration is adjusted to 200ppm.The ultraviolet Gas-phase reactor, is looped around around crystal reaction tube as light source by 4 uviol lamps (Philip, 4w, 254nm).Loaded catalyst is about 0.3g, and after being communicated with the generating means pipeline, absorption is spent the night, and reaches capacity.After reaction starts, it is upper and lower that temperature maintains room temperature all the time, every 30min chromatogram sample introduction, detects change in concentration and the CO of benzene
2the generation situation.Result shows, performance raising 30%, the CO of the light degradation benzene of advanced composite material (ACM)
2output increases 60ppm; After chlorination is processed, the benzene degradation rate increases 1 times, and mineralization rate also significantly promotes.
Embodiment 2:
SrTiO
3/ TiO
2composite photo-catalyst and chloride degraded methyl orange thereof.Liquid phase reactor is used traditional ultraviolet catalytic reaction unit, adopts 4 uviol lamps (Philip, 4w, 254nm) as light source, is looped around around crystal reaction tube.Preparation 20mg/L obtains methyl orange 80mL, adds the 40mg catalyst, continues to stir and adsorb to spend the night.After reaction starts, temperature maintains room temperature, every the 1h sampling, after centrifugation, adopts spectrophotometer to detect the absorbance of methyl orange, thereby calculates the C/C of course of reaction
0.Result shows, the liquid phase degradation capability of advanced composite material (ACM) is with respect to general T iO
2significantly promote, it is degradable that 0.5-1h can reach substantially.
Claims (1)
1.SrTiO
3/ TiO
2the preparation method of composite photo-catalyst is characterized in that: the concrete operation step of the method is as follows: in mass ratio 18%, and by SrTiO
3powder joins in 150ml titanium glue, vigorous stirring 24h, microwave drying; Muffle furnace 400-500 ℃ of sintering 3-5h, obtain SrTiO
3/ TiO
2composite photocatalyst material; Get the 1g compound and be immersed in the 2ml concentrated hydrochloric acid, in dark place sealing and standing 24h, place at the fume hood split shed subsequently, until hydrochloric acid volatilizees fully substantially, last 50-60 ℃ of oven dry gets final product.
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| CN201210185987XA CN103464133A (en) | 2012-06-07 | 2012-06-07 | Preparation and chlorination method of SrTiO3/TiO2 composite photocatalyst |
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| CN201210185987XA CN103464133A (en) | 2012-06-07 | 2012-06-07 | Preparation and chlorination method of SrTiO3/TiO2 composite photocatalyst |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106721879A (en) * | 2016-12-05 | 2017-05-31 | 南京悠谷知识产权服务有限公司 | One kind purification preservation device |
| CN107617435A (en) * | 2017-10-31 | 2018-01-23 | 上海师范大学 | A kind of SrTiO3Titanium oxide nanotubes heterojunction photocatalyst of load and its preparation method and application |
| CN107930633A (en) * | 2017-11-23 | 2018-04-20 | 江苏理工学院 | A kind of new SrTiO3/Cu2O ties the preparation method and application of composite nano materials |
| CN108889299A (en) * | 2018-05-22 | 2018-11-27 | 东南大学 | A kind of oxidation catalyst of cyclopropene Au-V2O5-SrTiO3Preparation method and application |
| CN111705548A (en) * | 2020-05-26 | 2020-09-25 | 仙鹤股份有限公司 | Preparation method of decorative base paper |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106721879A (en) * | 2016-12-05 | 2017-05-31 | 南京悠谷知识产权服务有限公司 | One kind purification preservation device |
| CN107617435A (en) * | 2017-10-31 | 2018-01-23 | 上海师范大学 | A kind of SrTiO3Titanium oxide nanotubes heterojunction photocatalyst of load and its preparation method and application |
| CN107930633A (en) * | 2017-11-23 | 2018-04-20 | 江苏理工学院 | A kind of new SrTiO3/Cu2O ties the preparation method and application of composite nano materials |
| CN107930633B (en) * | 2017-11-23 | 2020-11-20 | 江苏理工学院 | Preparation method and application of SrTiO3/Cu2O heterojunction composite nano material |
| CN108889299A (en) * | 2018-05-22 | 2018-11-27 | 东南大学 | A kind of oxidation catalyst of cyclopropene Au-V2O5-SrTiO3Preparation method and application |
| CN108889299B (en) * | 2018-05-22 | 2021-04-06 | 东南大学 | Preparation method and application of propylene epoxidation catalyst Au-V2O5-SrTiO3 |
| CN111705548A (en) * | 2020-05-26 | 2020-09-25 | 仙鹤股份有限公司 | Preparation method of decorative base paper |
| CN111705548B (en) * | 2020-05-26 | 2021-12-31 | 仙鹤股份有限公司 | Preparation method of decorative base paper |
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