Preparation and photocatalytic activity of Fe-doped mesoporous titanium dioxide nanocrystalline photocatalysts

被引：235

作者：

Zhou, MH

Yu, JG ^{[1
]}

Cheng, B

Yu, HG

机构：

[1] Wuhan Univ Technol, State Key Lab Adv Technol Mat Synth & Proc, Wuhan 430070, Peoples R China

[2] Yunyang Med Coll, Shiyan 442000, Hubei, Peoples R China

来源：

MATERIALS CHEMISTRY AND PHYSICS | 2005年 / 93卷 / 01期

基金：

中国国家自然科学基金;

关键词：

mesoporous; TiO2; anatase; nanocrystalline; sol-gel method; Fe-doping; photocatalytic oxidation; acetone;

D O I：

10.1016/j.matchemphys.2005.03.007

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Fe-doped mesoporous titanium dioxide nanocrystalline photocatalysts were prepared by the sol-gel method. The as-prepared samples were characterized with X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS) and N-2 adsorption-desorption measurements. The photocatalytic activities were evaluated by photocatalytic oxidation of acetone in air. It was found that a small amount of Fe dopant in mesoporous TiO2 powders could obviously enhance the photocatalytic activity, and when the atomic ratio of Fe/Ti was in the range of 0.05-0.25%, the photocatalytic activity of the samples was higher than that of Degussa P25 and un-doped mesoporous TiO2 powders. This was ascribed to the fact that a small amount of Fe dopant reduced the recombination of photo-generated electrons and holes in the mesoporous TiO2 powders during heterogeneous photocatalytic reaction. (c) 2005 Elsevier B.V. All rights reserved.

引用

页码：159 / 163

页数：5

共 38 条

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