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Acta Phys. -Chim. Sin.  2004, Vol. 20 Issue (12): 1434-1439    DOI: 10.3866/PKU.WHXB20041207
Article     
Synergistic Effect of Eu3+ and Si4+ Co-doping on Photocatalytic Activity of Titanium Dioxide
Li Yue-Xiang; Wang Tian-Hui; Peng Shao-Qin1 Lü Gong-Xuan; Li Shu-Ben
Department of Chemistry, Nanchang University, Nanchang 330047; State Key Laboratory for Oxo Synthesis and Selective Oxidation, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou 730000
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Abstract  Eu/Ti/Si composite photocatalysts were prepared by sol-gel-soaking process and characterized by XRD, FT-IR and EPR. It has been shown that the particle diameter of Eu/Ti/Si photocatalysts decreased, the crystal transformation of titania from anatase to rutile was prevented, and the incorporation of Si4+ into the matrix of the TiO2 was promoted owing to the co-doping of Si4+ and Eu3+. As a model reaction, the photocatalytic degradation of methyl orange was investigated. The adsorption constants of methyl orange over catalysts were evaluated and the adsorption mechanism was also discussed. Optimal doping amounts for Si4+ and Eu3+ are wSiO2=39.06% and wEu=0.03% respectively, and the co-doping of them shows a synergistic effect for photocatalytic activity of titanium dioxide. Relation between photocatalytic activity and property of the photocatalyst was discussed.

Key wordsPhotocatalysis       Titanium dioxide       Eu3+ and Si4+ co-doping       Methyl orange       Synergistic effect     
Received: 11 May 2004      Published: 15 December 2004
Corresponding Authors: Li Yue-Xiang     E-mail: liyx@ncu.edu.cn
Cite this article:

Li Yue-Xiang; Wang Tian-Hui; Peng Shao-Qin1 Lü Gong-Xuan; Li Shu-Ben. Synergistic Effect of Eu3+ and Si4+ Co-doping on Photocatalytic Activity of Titanium Dioxide. Acta Phys. -Chim. Sin., 2004, 20(12): 1434-1439.

URL:

http://www.whxb.pku.edu.cn/10.3866/PKU.WHXB20041207     OR     http://www.whxb.pku.edu.cn/Y2004/V20/I12/1434

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