文献类型：期刊文献

英文题名：Preparation and photocatalytic properties of Fe³⁺-doped Ag@TiO₂ core-shell nanoparticles

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

年份：2008

卷号：323

期号：1

起止页码：182

外文期刊名：JOURNAL OF COLLOID AND INTERFACE SCIENCE

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000256646600025)】；

语种：英文

外文关键词：titanium oxide; photodegradation; Ag@TiO2; Fe3+ doping; core-shell structure

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.