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用溶胶-凝胶法制备了不同TiO2含量的TiO2/MCM-41光催化剂,以罗丹明B为模拟有机污染物,对催化剂的光催化脱色性能进行了考察.用XRD、UV-Vis漫反射、N2吸附等方法对光催化剂进行了表征,结果表明:TiO2/MCM-41的比表面积和孔体积随TiO2含量的增加而减小,TiO2/MCM-41负载型催化剂上TiO2平均晶粒尺寸比纯TiO2的小.20% TiO2/MCM-41的光生电子-空穴分离效应最高,且光催化脱色活性最高.光催化反应体系中h+是主要的活性自由基,TiO2/MCM-41的光催化活性由材料的吸附能力和所含TiO2的光催化性能共同决定.

参考文献

[1] Kazuhito Hashimoto;Hiroshi Irie;Akira Fujishima .TiO2 photocatalysis:A historical overview and future prospects[J].AAPPS Bulletin,2007,17:6-15.
[2] Zhaoke Zheng;Baibiao Huang;Xiaoyan Qin;Xiaoyang Zhang;Ying Dai;Minhua Jiang;Peng Wang;Myung-Hwan Whangbo .Highly Efficient Photocatalyst: TiO_2 Microspheres Produced from TiO_2 Nanosheets with a High Percentage of Reactive {001} Facets[J].Chemistry: A European journal,2009(46):12576-12579.
[3] Popova M;Szegedi A;Cherkezova-Zheleva Z et al.Toluene oxidation on titanium-and iron-modified MCM-41 materials[J].Hazardous Materials,2009,168:226-232.
[4] Souza MJB;Araujo AS;Aquino JMFB et al.Hydrodesulfurization of thiophene over cobalt and molybdenum sulfides supported on MCM-41 materials[J].Studies in surface science and catalysis,2005,156:755-760.
[5] Jin S;Cui K;Guan H et al.Preparation of mesoporous MCM-41 from natural sepiolite and its catalytic activity of cracking waste polystyrene[J].Applied Clay Science,2012,56:1-6.
[6] M.S. Sadjadi;N. Farhadyar;K. Zare .Improvement of the alkaline protease properties via immobilization on the TiO_2 nanoparticles supported by mesoporous MCM-41[J].Superlattices and microstructures,2009(1/2):77-83.
[7] Maria D Alba;Zhaohua Luan;Jacek Klinowski .Titanosilicate mesoporous molecular sieve MCM-41:synthesis and characterization[J].Physical Chenistry,1996,10(1):1021-1024.
[8] Kloetstra K R;Zandbergen H W;Bekkum H .MCM-41 type materials with low Si/Al ratios[J].Catalysis Letters,1995,33(1-2):157-162.
[9] Kirik Sergei D;Parfenov Vladimir A;Zharkov Sergei M .Monitoring MCM-41 synthesis by X-ray mesostructure analysis[J].Microporous and Mesoporous Materials,2014,195(1):21-30.
[10] Allen W. Burton;Kenneth Ong;Thomas Rea .On the estimation of average crystallite size of zeolites from the Scherrer equation: A critical evaluation of its application to zeolites with one-dimensional pore systems[J].Microporous and Mesoporous Materials,2009(1/2):75-90.
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