Preparation of grape-like Bi2O3/Ti photoanode and its visible light activity

被引：15

作者：

Li, Guoting ^{[2
]}

Yip, H. Y.

Hu, Chun ^{[4
]}

Wong, P. K. ^{[1
,3
]}

机构：

[1] Chinese Univ Hong Kong, Ctr Sci, Dept Biol, Shatin, Hong Kong, Peoples R China

[2] N China Univ Water Conservancy & Elect Power, Dept Environm & Municipal Engn, Zhengzhou 450011, Peoples R China

[3] Chinese Univ Hong Kong, Environm Sci Programme, Shatin, Hong Kong, Peoples R China

[4] Ecoenvironm Sci Res Ctr, State Key Lab Environm Aquat Chem, Beijing 100085, Peoples R China

来源：

MATERIALS RESEARCH BULLETIN | 2011年 / 46卷 / 02期

基金：

中国国家自然科学基金;

关键词：

Semiconductors; Oxides; Thin films; Photoelectron spectroscopy; Catalytic properties; PHOTOCATALYTIC DEGRADATION; FILM ELECTRODE; IRRADIATION; WATER; TIO2; PENTACHLOROPHENOL; ELECTROCHEMISTRY; ELECTROCATALYSIS; DECOMPOSITION; ENVIRONMENT;

D O I：

10.1016/j.materresbull.2010.11.030

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Compact and grape-like bismuth oxide (Bi2O3) coated titania (Ti) anode was prepared by oxalic acid (H2C2O4) etching, electrodeposition and calcination in order to explore its photoelectrocatalytic activities. The Bi2O3 coating was demonstrated to be full of pores, and a good combination between Bi2O3 layer and honeycomb-like Ti substrate was observed by scanning electron microscopy. The characteristic morphology of Bi2O3 coating indicated that the electrode is stable during degradation. The Bi2O3/Ti electrode was used in oxidative degradation of Acid Orange 7 by electrolysis, photocatalytic oxidation and photoelectrocatalytic oxidation processes. The pseudo-first order kinetics parameter (K-app) of photoelectrocatalytic process was 1.15 times of the sum of electrolysis and photocatalytic oxidation under visible light irradiation at 420 nm. The results indicated that the synergy of electrolysis and photocatalysis lead to an excellent photoelectrocatalytic property of the Bi2O3/Ti electrode. (C) 2010 Elsevier Ltd. All rights reserved.

引用

页码：153 / 157

页数：5

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