Preparation and photocatalytic properties of Fe3+-doped Ag@TiO2 core-shell nanoparticles

被引：114

作者：

Wang, Wenjiao ^{[1
,2
]}

Zhang, Jinlong ^{[1
,2
]}

Chen, Feng ^{[1
,2
]}

He, Dannong ^{[3
]}

Anpo, Masakazu ^{[4
]}

机构：

[1] E China Univ Sci & Technol, Adv Mat Lab, Shanghai 200237, Peoples R China

[2] E China Univ Sci & Technol, Inst Fine Chem, Shanghai 200237, Peoples R China

[3] Shanghai Natl Engn Res Ctr Nanotechnol, Shanghai 200237, Peoples R China

[4] Osaka Prefecture Univ, Grad Sch Engn, Dept Appl Chem, Osaka 5998531, Japan

来源：

JOURNAL OF COLLOID AND INTERFACE SCIENCE | 2008年 / 323卷 / 01期

关键词：

titanium oxide; photodegradation; Ag@TiO2; Fe3+ doping; core-shell structure;

D O I：

10.1016/j.jcis.2008.03.043

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：

Ag@TiO2 core-shell-type nanophotocatalysts have been prepared using a simple and convenient method. The products were characterized by TEM, XRD, and UV-vis spectra. To make the catalysts achieve the highest photocatalytic activity under UV light illumination, the Ag content of Ag@TiO2 was optimized. The results showed that Ag@TiO2-doped Fe3+ extend their absorption into the visible region. Among the Fe3+-doped samples, Ag@Fe-TiO2 with low Ag content showed higher photocatalytic activity under visible light illumination. An excessive added amount of Ag would reduce Fe3+ to Fe2+ and make them difficult to be incorporated into the lattice of titania. From the experiments, we found that Fe3+ ions could stabilize the Ag@TiO2 colloid by holding back the aggregation of the core-shell nanoparticles. (C) 2008 Elsevier Inc. All rights reserved.

引用

页码：182 / 186

页数：5

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