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A mechanism for enhanced photocatalytic activity of silver-loaded titanium dioxide
Liu, SX; Qu, ZP; Han, XW; Sun, CL
关键词Photocatalytic Activity Silver-loaded Tio2 Photogenerated Reactive Species
刊名CATALYSIS TODAY
2004-09-01
DOI10.1016/j.cattod.2004.06.097
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
关键词[WOS]ELECTRON-PARAMAGNETIC-RESONANCE ; UV IRRADIATION ; TIO2 COLLOIDS ; ANATASE ; WATER ; RES
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.
语种英语
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WOS记录号WOS:000223973200126
引用统计
被引频次:186[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://cas-ir.dicp.ac.cn/handle/321008/81009
专题中国科学院大连化学物理研究所
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
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GB/T 7714
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.
APA Liu, SX,Qu, ZP,Han, XW,&Sun, CL.(2004).A mechanism for enhanced photocatalytic activity of silver-loaded titanium dioxide.CATALYSIS TODAY,93-5(93-95),877-884.
MLA Liu, SX,et al."A mechanism for enhanced photocatalytic activity of silver-loaded titanium dioxide".CATALYSIS TODAY 93-5.93-95(2004):877-884.
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