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Preparation and characterization of visible light responsive Fe2O3-TiO2 composites |
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| Authors: | Hong LiuH.K. Shon Xuan SunS. Vigneswaran Hao Nan |
| Affiliation: | a Department of Resource and Environment Engineering, Wuhan University of Science and Technology, Wuhan, Hubei 430081, PR China b Faculty of Engineering and Information Technology, University of Technology, Sydney (UTS), P.O. Box 123, Broadway, NSW 2007, Australia c Hubei Haiwang Environmental Engineering Co. Ltd., Wuhan, Hubei 430064, PR China d Taiyuan university, Taiyuan, Shanxi 030009, PR China |
| Abstract: | 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 Fe2(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 α-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 m2/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. |
| Keywords: | Fe2O3-TiO2 composites Hydrothermal synthesis Photocatalytic activity Auramine Degradation efficiency |
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