Photocatalytic activity and interfacial carrier transfer of Ag-TiO2 nanoparticle films

被引：63

作者：

Xin, BF ^{[1
]}

Ren, ZY ^{[1
]}

Hu, HY ^{[1
]}

Zhang, XY ^{[1
]}

Dong, CL ^{[1
]}

Shi, KY ^{[1
]}

Jing, LQ ^{[1
]}

Fu, HG ^{[1
]}

机构：

[1] Heilongjiang Univ, Sch Chem & Mat Sci, Phys Chem Lab, Harbin 150080, Peoples R China

来源：

APPLIED SURFACE SCIENCE | 2005年 / 252卷 / 05期

基金：

中国国家自然科学基金;

关键词：

Ag modified TiO2; photocatalysis; charge carrier transfer;

D O I：

10.1016/j.apsusc.2005.03.172

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The electrodes of Ag-TiO2 with different Ag content are prepared by a modified sol-gel method. The photochemical properties of Ag-TiO2 with different Ag content are characterized by surface photovoltage spectroscopy (SPS). The results show that the SPS intensity decreased with increasing Ag contents. This demonstrates that the doping Ag plays the roles trapping photoinduced electrons, which inhibiting the recombination of photoinduced electrons and holes. The photoclectrochemical properties of Ag-TiO2 electrodes with different Ag content are performed by electrochemical impedance spectroscopy (EIS) under high-pressure mercury lamp (160 W) illuminating, and photocatalytic degradation of RhB are studied at the same time. The experimental results indicate that the process of charge transfer is a controlled-step of photocatalytic reaction. The SPS intensity and the electrical impedance values of EIS equivalent circuits are contrary to photocatalytic degradation ratio of RhB. (c) 2005 Elsevier B.V. All rights reserved.

引用

页码：2050 / 2055

页数：6

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