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题名: A mechanism for enhanced photocatalytic activity of silver-loaded titanium dioxide
作者: Liu, SX;  Qu, ZP;  Han, XW;  Sun, CL
关键词: photocatalytic activity ;  silver-loaded TiO2 ;  photogenerated reactive species
刊名: CATALYSIS TODAY
发表日期: 2004-09-01
DOI: 10.1016/j.cattod.2004.06.097
卷: 93-5, 期:93-95, 页:877-884
收录类别: ISTP ;  SCI
文章类型: Article
项目归属: 902502
产权排名: 1;1
WOS标题词: Science & Technology ;  Physical Sciences ;  Technology
类目[WOS]: Chemistry, Applied ;  Chemistry, Physical ;  Engineering, Chemical
研究领域[WOS]: Chemistry ;  Engineering
英文摘要: In this paper, silver-loaded TiO2 photocatalyst was prepared by photochemical impregnation method and characterized by transmission electron microscopy (TEM), diffuse reflectance spectra (DRS), photooxidation of phenol and photoreduction of Cr(VI). Electron paramagnetic resonance (EPR) was used to detect photoproduced paramagnetic radicals. The correlation of photocatalytic activity and photogenerated reactive species was discussed, and the mechanism of silver-loaded TiO2 for enhancement of photocatalytic activity was elucidated. The results show that deposited silver on TiO2 Surface acts as a site where electrons accumulate. The better separation between electrons and holes on the modified TiO2 surface allowed more efficiency for the oxidation and reduction reactions. The enhanced photocatalytic activity was mainly attributed to the increased amounts of O-2(.-) reactive species and surface Ti3+ reactive center on silver-loaded TiO2 photocatalyst. (C) 2004 Published by Elsevier B.V.
关键词[WOS]: ELECTRON-PARAMAGNETIC-RESONANCE ;  UV IRRADIATION ;  TIO2 COLLOIDS ;  ANATASE ;  WATER ;  RES
语种: 英语
原文出处: 查看原文
WOS记录号: WOS:000223973200126
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/81009
Appears in Collections:中国科学院大连化学物理研究所_期刊论文

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作者单位: 1.Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Catalysis, Dalian 116023, Peoples R China
2.NE Forest Univ, Harbin 150040, Peoples R China

Recommended Citation:
Liu, SX,Qu, ZP,Han, XW,et al. A mechanism for enhanced photocatalytic activity of silver-loaded titanium dioxide[J]. CATALYSIS TODAY,2004,93-5(93-95):877-884.
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