Preparation and characterization of visible light responsive Fe2O3-TiO2 composites

被引：79
作者：
Liu, Hong [2 ]
Shon, H. K. [1 ]
Sun, Xuan [3 ]
Vigneswaran, S. [1 ]
Nan, Hao [4 ]
机构：
[1] Univ Technol Sydney, Fac Engn & Informat Technol, Broadway, NSW 2007, Australia
[2] Wuhan Univ Sci & Technol, Dept Resource & Environm Engn, Wuhan 430081, Hubei, Peoples R China
[3] Hubei Haiwang Environm Engn Co Ltd, Wuhan 430064, Hubei, Peoples R China
[4] Taiyuan Univ, Taiyuan 030009, Shanxi, Peoples R China
来源：
APPLIED SURFACE SCIENCE | 2011年 / 257卷 / 13期
关键词：
Fe2O3-TiO2; composites; Hydrothermal synthesis; Photocatalytic activity; Auramine; Degradation efficiency; PHOTOCATALYTIC ACTIVITY; DOPED TIO2; ENVIRONMENTAL APPLICATIONS; ORGANIC POLLUTANTS; ONE-STEP; DEGRADATION; IRRADIATION; NANOPARTICLES; NANOCATALYST; COATINGS;
D O I：
10.1016/j.apsusc.2011.01.110
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：
In this study we present the effects of iron oxide (Fe2O3) on titanium dioxide (TiO2) in synthesising visible-light reactive photocatalysts. A Fe2O3-TiO2 composite photocatalyst was synthesized from Fe-2(SO4)(3) and Ti(SO4)(2) by a ethanol-assisted hydrothermal method. The preparation conditions were optimized through the investigation of the effects of hydrothermal temperature and time as well as molar ratio of Ti to Fe on the photocatalytic activity. The visual, physical and chemical properties of the Fe2O3-TiO2 composites were investigated. The results showed that alpha-Fe2O3 and anatase TiO2 were present in the composites. The Fe2O3-TiO2 synthesized under optimum condition consisted of mesoporous structure with an average pore size of 4 nm and a surface area of 43 m(2)/g. Under visible and solar light irradiation, the photocatalytic activity of optimized sample was significantly higher than that of pure TiO2. This sample led to a photodegradation efficiency of 90% and 40% of auramine under visible light and solar light, respectively. (C) 2011 Elsevier B.V. All rights reserved.
引用
收藏
页码：5813 / 5819
页数：7
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