Microstructures and Photocatalytic Properties of S Doped Nanocrystalline TiO2 Films |
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| Authors: | Xue-Lei Peng Fang Li Xiao-Hu Sun |
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| Affiliation: | 1. School of Chemistry and Chemical Engineering, Shandong Provincial Key Laboratory of Fluorine Chemistry and Chemical Materials, University of Jinan , Jinan , P. R. China;2. China State Construction Engineering Corporation the 8th Company 2nd Subsidiary Company Zhengzhou Branch , Zhengzhou , P. R. China |
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| Abstract: | The nanocrystalline S doped titanium dioxide films were successfully prepared by the improved sol-gel process. Here TiO(C4H9O)4 and CS(NH2)2 were used as precursors of titania and sulfur, respectively. The as-prepared specimens were characterized using x-ray diffraction (XRD), x-ray energy dispersive spectroscopy (EDS), high-resolution field emission scanning electron microscopy (FE-SEM), Brunauer-Emmett-Teller (BET) surface area, and ultraviolet-visible diffuse reflectance spectroscopy. The photocatalytic activities of the films were evaluated by degradation of organic dyes in aqueous solution. The results of XRD, FE-SEM, and BET analyses indicated that the TiO2 films were composed of nanoparticles. S doping could obviously not only suppress the formation of brookite phase but also inhibit the transformation of anatase to rutile at high temperature. Compared with pure TiO2 film, S doped TiO2 film exhibited excellent photocatalytic activity. It is believed that the surface microstructure of the modified films is responsible for improving the photocatalytic activity. |
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| Keywords: | microstructure photodegradation S doped sol-gel TiO2 films |
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