Preparation of SnO2–TiO2/Fly Ash Cenospheres and its Application in Phenol Degradation |
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| Authors: | Shaomin Liu Jinglin Zhu Qing Yang Pengpeng Xu Jianhua Ge Xuetao Guo |
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| Affiliation: | School of Earth Science and Environmental Engineering, Anhui University of Science and Technology, Huainan, China |
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| Abstract: | SnO2–TiO2/fly ash cenospheres (FAC) were prepared via hydrothermal method and used as an active photocatalyst in a photocatalytic system. Scanning electron microscopy, X‐ray diffraction analysis, UV–Vis diffuse reflectance spectroscopy, Fourier transform infrared spectroscopy and N2 adsorption–desorption measurements were used to determine the structure and optical property of SnO2–TiO2/FAC. Phenol was selected as the model substance for photocatalytic reactions to evaluate catalytic ability. Results showed that the degradation efficiency of phenol by SnO2–TiO2/FAC was 90.7% higher than that decomposed by TiO2/FAC. Increased efficiency could be due to the enhanced synergistic effect of semiconductors and FAC could provide more adsorption sites for the pollutant in the photocatalytic reaction. Furthermore, SnO2–TiO2/FAC composites exhibited excellent photocatalytic stability in four reuse cycles. Radical‐trapping experiments further revealed the dominating functions of holes in the photocatalytic reaction. |
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