水资源与水工程学报

文章摘要

谷守扬,陶红,陈希,黑晓慧,卑蕾蕾.W-S-TiO₂/SBA-15复合材料的表征及其可见光降解性能Journal of Water Resources and Water Engineering[J].,2013,24(1):73-77

W-S-TiO₂/SBA-15复合材料的表征及其可见光降解性能

Characterization and visible light photocatalytic activity of W-S-TiO₂/SBA-15composite

Received:November 26, 2012 Revised:January 07, 2013

DOI：10.11705/j.issn.1672-643X.2013.01.016

中文关键词: W-S-TiO₂/SBA-15 介孔材料光催化可见光

英文关键词: W-S-TiO₂/SBA-15 mesoporous photocatalysis visible light

基金项目:上海市自然科学基金项目(10ZR1421300)； 2012年上海“大学生创新创业训练计划”项目(201210252090)

Author Name	Affiliation
GU Shouyang	School of Environment and Architecture, University of Shanghai for Science and Technology, Shanghai 200093, China [KH*5D]
TAO Hong	School of Environment and Architecture, University of Shanghai for Science and Technology, Shanghai 200093, China [KH*5D]
CHEN Xi	School of Environment and Architecture, University of Shanghai for Science and Technology, Shanghai 200093, China [KH*5D]
HEI Xiaohui	School of Environment and Architecture, University of Shanghai for Science and Technology, Shanghai 200093, China [KH*5D]
BEI Leilei	School of Environment and Architecture, University of Shanghai for Science and Technology, Shanghai 200093, China [KH*5D]

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中文摘要:

利用介孔分子筛SBA-15的良好负载性和孔道均匀性,以钛酸四丁酯、硫代硫酸钠、钨酸钠分别作为钛、硫、钨源,水热合成了W-S-TiO₂/SBA-15材料。对材料进行XRD、BET、SEM、XPS、UV-Vis分析。结果显示TiO₂的负载并没有破坏SBA-15的介孔结构,UV-Vis分析发现掺杂W、S后,合成材料对光的响应拓展到可见光区,XPS分析证实了硫以阳离子S⁶⁺进入TiO₂晶格,而W以同晶取代方式占据晶格中Ti的位置。光催化实验考察了材料5h内对20mg/L亚甲基蓝的去除效果,结果显示可见光下W-S-TiO₂/SBA-15光催化效率分别是未掺杂样品和市售Degussa P25光催化剂的3.7和7.2倍,具备良好的可见光催化能力。

英文摘要:

In accordance with the good load property of SBA-15and the uniformity of its channels, using tetrabutyl titanate, sodium thiosulfate and sodium tungstate as Ti, S and W source respectively, W-S-TiO₂/SBA-15were synthesized by the ex-situ method under hydrothermal treatment and then characterized by XRD, BET, SEM, XPS and UV-Vis techniques. Results showed that the SBA-15maintained complete mesoporous structure after loaded TiO_2relatively. The results of UV-Vis show that co-doping W and S into TiO_2induce the red-shift of its absorption edge to the visible-light region. The results of XPS show that S atoms as S⁶⁺ state enter the lattice of TiO₂, W ions and occupy the sites of Ti in crystal lattice by isomorphous replacement. The photocatalytic activity was evaluated by photocatalytic oxidation of 20mg/L methylene blue (MB) solutions under visible irradiation. The W-S-TiO₂/SBA-15catalyst, especially, displays the highest degradation ability for MB under visible light irradiation, part of MB could be degraded within 5h, which is almost 3.7times of Degussa P25and 7.2times of the photocatalytic activity of TiO₂/SBA-15respectively.

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