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Acta Phys. -Chim. Sin.  2004, Vol. 20 Issue (06): 621-625    DOI: 10.3866/PKU.WHXB20040614
Article     
Influence of Silver Deposition on the Transfer of Photogenerated Electrons for TiO2 Photocatalyst
Liu Shou-Xin;Sun Cheng-Lin
Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023;Northeast Forestry University, Harbin 150040
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Abstract  In the present work, the influence of silver deposition on the transfer of photogenerated electrons was investigated. The catalyst was characterized by in-situ EPR, DRS, BET and phenol degradation under different conditions. The result showed that suitable size of silver cluster deposition can attract photogenerated electrons effectively and then the electrons transferred to the adsorbed oxygen and surface Ti4+ efficiently. The recombination of the photogenerated electrons and holes was inhibited. The enhanced photocatalytic activity was mainly caused by the increased amount of reactive species, the higher amount of surface reactive center Ti3+ and photogenerated holes.

Key wordsNano-size silver cluster      Ag/TiO2      Electron transfer      Photocatalysis       In-situ EPR     
Received: 26 November 2003      Published: 15 June 2004
Corresponding Authors: Sun Cheng-Lin     E-mail: clsun@dicp.ac.cn
Cite this article:

Liu Shou-Xin;Sun Cheng-Lin. Influence of Silver Deposition on the Transfer of Photogenerated Electrons for TiO2 Photocatalyst. Acta Phys. -Chim. Sin., 2004, 20(06): 621-625.

URL:

http://www.whxb.pku.edu.cn/10.3866/PKU.WHXB20040614     OR     http://www.whxb.pku.edu.cn/Y2004/V20/I06/621

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