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Citation: Li Yue-Xiang, Wang Tian-Hui, Peng Shao-Qin1　Lü ng-Xuan, Li Shu-Ben, . Synergistic Effect of Eu^3＋ and Si^4＋ Co-doping on Photocatalytic Activity of Titanium Dioxide[J]. Acta Physico-Chimica Sinica, ;2004, 20(12): 1434-1439. doi: 10.3866/PKU.WHXB20041207 shu

Synergistic Effect of Eu^3＋ and Si^4＋ Co-doping on Photocatalytic Activity of Titanium Dioxide

1.
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

Corresponding author: ,
Received Date: 11 May 2004
Available Online: 15 December 2004

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.
- Photocatalysis;　Titanium dioxide;　Eu3＋ and Si4＋ co-doping;　Methyl orange;　Synergistic effect
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Synergistic Effect of Eu3＋ and Si4＋ Co-doping on Photocatalytic Activity of Titanium Dioxide

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Synergistic Effect of Eu^3＋ and Si^4＋ Co-doping on Photocatalytic Activity of Titanium Dioxide