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Citation: Liu Shou-Xin, Sun Cheng-Lin. Influence of Silver Deposition on the Transfer of Photogenerated Electrons for TiO₂ Photocatalyst[J]. Acta Physico-Chimica Sinica, ;2004, 20(06): 621-625. doi: 10.3866/PKU.WHXB20040614 shu

Influence of Silver Deposition on the Transfer of Photogenerated Electrons for TiO₂ Photocatalyst

1.
Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian　116023;Northeast Forestry University, Harbin　150040

Received Date: 26 November 2003
Available Online: 15 June 2004

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.
- Nano-size silver cluster;Ag/TiO₂;Electron transfer;Photocatalysis;　In-situ EPR
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沈阳化工大学材料科学与工程学院沈阳 110142

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Influence of Silver Deposition on the Transfer of Photogenerated Electrons for TiO₂ Photocatalyst