期刊
APPLIED SURFACE SCIENCE
卷 320, 期 -, 页码 146-153出版社
ELSEVIER
DOI: 10.1016/j.apsusc.2014.09.095
关键词
ZnFe2O4-Fe2O3-BI2WO6; Hollow nanosp he res; Cascade structure; Photocatalysis; Separation
类别
资金
- National Natural Science Foundation of China [51202136]
- Special Fund from Shaanxi Provincial Department of Education [2013JK0939]
- Academic Backbone Cultivation Program of Shaanxi University of Science Technology [X5GP201202]
- Postgraduate Innovation Fund of Shaanxi University of Science and Technology
Magnetically separable ternary hybrid ZnFe2O4-Fe2O3-Bi2WO6 hollow nanospheres were designed and synthesized by an effective three-step approach. Specifically, using phenolic formaldehyde microspheres (PFS) as template direct the sequential coating of alpha-Fe2O3/ZnFe2O4 layer and subsequent Bi2WO6 layer via impregnating-calcination process. The photocatalytic activity under visible light irradiation is in the order of ZnFe2O4-Fe2O3-Bi2WO6 > ZnFe2O4-Fe2O3-Bi2WO6 >Bi2WO6 > ZnFe2O4-Fe2O3 > ZnFe2O4. The enhanced activity could be attributed to the cascade electron transfer from ZnFe204 to ce.-Fe203 then to Bi2WO6 through the interfacial potential gradient in the ternary hybrid conduction bands, which facilitate the charge separation and retard the charge pair recombination. Furthermore, the ternary hybrid ZnFe2O4-Fe2O3-Bi2WO6 hollow nanospheres could be conveniently separated by using an external magnetic field, and be chemically and optically stable after several repetitive tests. The study also provides a general and effective method in the composite hollow nanomaterials with sound heterojunctions that may show a variety of applications. (C) 2014 Elsevier B.V. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据