Photocatalytic activity of a novel Bi-based oxychloride catalyst Na0.5Bi1.5O2Cl

被引：36

作者：

Lin, Xinping ^{[1
]}

Shan, Zhichao ^{[1
]}

Li, Kaiqiang ^{[1
]}

Wang, Wendeng ^{[1
]}

Yang, Jianhua ^{[1
]}

Huang, Fuqiang ^{[1
]}

机构：

[1] Chinese Acad Sci, Shanghai Inst Ceram, State Key Lab High Performance Ceram & Superfine, Shanghai 200050, Peoples R China

来源：

SOLID STATE SCIENCES | 2007年 / 9卷 / 10期

基金：

中国国家自然科学基金;

关键词：

photocatalysis; Na0.5Bi1.5O2CI; BiOCl; TiO2;

D O I：

10.1016/j.solidstatesciences.2007.07.010

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

A Bi-based oxychloride Na0.5Bi1.5O2Cl with a layered structure as a novel efficient photocatalyst was studied in the present paper. The powder was synthesized by a solid state reaction method. It was characterized by X-ray diffraction, scanning electron microscope and UV-vis diffuse reflectance spectrum. Degradation of methyl orange was used to evaluate the photocatalytic activity. The as-synthesized Na0.5Bi1.5O2Cl has a smaller optical band gap of 3.04 eV than BiOCI (E-g = 3.44 eV). It possesses a fair visible-light-response ability. The UV-induced photocatalytic activity follows the decreasing order of BiOCI > Na0.5Bi1.5O2Cl > TiO2, different from the order of Na0.5Bi1.5O2Cl > TiO, > BiOCl under visible light irradiation. The dispersion of Pt over Na0.5Bi1.5O2Cl leads to an obvious increase in the photocatalytic performance. The internal electric fields between [Na0.5Bi1.52]and [Cl] slabs favor the efficient separation of photostimulated electron-hole pairs. (c) 2007 Elsevier Masson SAS. All rights reserved.

引用

页码：944 / 949

页数：6

共 29 条

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