Synthesis of Fe2O3–TiO2/fly-ash-cenosphere composite and its mechanism of photocatalytic oxidation under visible light
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- 作者：Jinglin Zhu ; Shaomin Liu ; Jianhua Ge ; Xuetao Guo…
- 关键词：Fe2O3–TiO2/FAC ; Heterojunction structure ; Photocatalytic oxidation mechanism ; Reactive species
- 刊名：Research on Chemical Intermediates
- 出版年：2016
- 出版时间：April 2016
- 年：2016
- 卷：42
- 期：4
- 页码：3637-3654
- 全文大小：2,005 KB
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37.L.L. Peng, T.F. Xie, Y.C. Lu, H.M. Fan, D.J. Wang, Synthesis, photoelectric properties and photocatalytic activity of the Fe2O3/TiO2 heterogeneous photocatalysts. Phys. Chem. Chem. Phys. 12, 8033–8041 (2010)CrossRef - 作者单位：Jinglin Zhu (1)
Shaomin Liu (1)
Jianhua Ge (1)
Xuetao Guo (1)
Xingming Wang (1)
Huijun Wu (1)
1. School of Earth Science and Environmental Engineering, Anhui University of Science and Technology, Huainan, 232001, People’s Republic of China - 刊物类别：Chemistry and Materials Science
- 刊物主题：Chemistry
Catalysis
Physical Chemistry
Inorganic Chemistry - 出版者：Springer Netherlands
- ISSN：1568-5675
文摘
Fe2O3–TiO2/fly-ash-cenosphere (FAC) is a composite photocatalyst that was prepared by depositing Fe2O3 onto floating TiO2/FAC. Scanning electron microscopy, X-ray diffraction analysis, UV–Vis diffuse reflectance spectroscopy, N2 absorption–adsorption, Fourier transform infrared spectroscopy, and X-ray photoelectron spectroscopy were used to characterize the properties of the composites. Results showed that the modified methods could maintain the metastable anatase phase of TiO2. The crystalline phase of Fe2O3 was attributed to hematite. The band gap absorption edge of Fe2O3–TiO2/FAC was approximately 650–700 nm, and the absorption of the photocatalysts had an evident redshift. The composite displayed excellent photocatalytic oxidation activity. The degradation ratio of methylene blue was 86.81 % within 60 min under visible light by using Fe2O3–TiO2/FAC/H2O2. This ratio is 2.25 and 1.38 times higher than those of TiO2/FAC and Fe2O3/FAC, respectively. The excellent catalytic ability was attributed to Fe3+ doping combined with Fe2O3–TiO2 heterojunction structure. Finally, a mechanism for the photocatalytic oxidation was proposed based on experimental results by using Fe2O3–TiO2/FAC under visible light.