Abstract
A series of nanocrystalline V-doped (0.0–3.0 at.%) TiO2 catalysts have been successfully prepared by the one-step solution combustion method using urea as a fuel. The obtained powders were characterized by XRD, SEM, Raman, XPS and UV-Vis DRS. The effects of V doping concentration on the phase structure and photocatalytic properties were investigated. XRD, Raman, and XPS show that V doping diffuses into TiO2 crystal lattice mainly in the form of V5+ and causes a phase transition from anatase to rutile. V doping can widen the light absorption range of TiO2, with the absorption threshold wavelength shifting from 425 to 625 nm. The photocatalytic activity of V-doped TiO2 powders were evaluated by the photocatalytic degradation of methyl orange (MO) under visible light irradiation. It is found that V doping enhances the photocatalytic activity under visible light irradiation and the optimal degradation rate of MO is about 95.8% with 1.0 at% V-doped TiO2.
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Funded by the National Natural Science Foundation of China (Nos. 51002054, 51272079) and the Fundamental Research Funds for the Central Universities, HUST (No. 2011TS014)
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Ma, X., Xue, L., Yin, S. et al. Preparation of V-doped TiO2 photocatalysts by the solution combustion method and their visible light photocatalysis activities. J. Wuhan Univ. Technol.-Mat. Sci. Edit. 29, 863–868 (2014). https://doi.org/10.1007/s11595-014-1010-8
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DOI: https://doi.org/10.1007/s11595-014-1010-8