Synthesis of polyaniline-modified Fe3O4/SiO2/TiO2 composite microspheres and their photocatalytic application

被引：93

作者：

Huang, Xiubing ^{[1
]}

Wang, Ge ^{[1
]}

Yang, Mu ^{[1
]}

Guo, Wanchun ^{[1
]}

Gao, Hongyi ^{[1
]}

机构：

[1] Univ Sci & Technol Beijing, Sch Mat Sci & Engn, Beijing 100083, Peoples R China

来源：

MATERIALS LETTERS | 2011年 / 65卷 / 19-20期

基金：

中国国家自然科学基金;

关键词：

Magnetic materials; Multilayer structure; Photocatalyst; Visible light; Polyaniline; TIO2; DEGRADATION; LIGHT; NANOPARTICLES; CORE;

D O I：

10.1016/j.matlet.2011.06.005

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Polyaniline-modified Fe3O4/SiO2/TiO2 composite microspheres have been successfully synthesized by sol-gel reactions on Fe3O4 microspheres followed by the chemical oxidative polymerization of aniline. The synthesized multilayer-structured composites were characterized by TEM, XRD, TGA, UV-vis diffuse reflectance spectra and magnetometer. The photocatalytic activity was evaluated by the photodegradation of methylene blue under visible light. The effect of polyaniline (PANI) amounts on the photocatalytic activity was investigated. The photocatalytic activity results show that the Fe3O4/SiO2/TiO2 composites with about 2.4 wt.%-4.1 wt.% PANI could show higher photocatalytic efficiency than that of Fe3O4/SiO2/TiO2. Furthermore, the PANI-Fe3O4/SiO2/TiO2 photocatalyst could be easily recovered using a magnet. (C) 2011 Elsevier B.V. All rights reserved.

引用

页码：2887 / 2890

页数：4

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