Preparation of TiO₂ photocatalyst loaded with V₂O₅ for O₂ evolution

Abstract

TiO₂ photocatalysts loaded with V₂O₅ were prepared via a modified hydrolysis process, and characterized by X-ray diffraction, transmission electron microscopy, Raman spectra and diffuse reflectance UV-Vis spectra measurements. The photocatalytic activity of V₂O₅/TiO₂ was investigated by employing splitting of water for O₂ evolution. The results indicate that V₂O₅ loading can pronouncedly improve the photocatalytic activity of TiO₂ with Fe³⁺ as an electron acceptor under UV or visible light irradiation. The optimum mass fraction of the loaded V₂O₅ is 8%, and the largest speed of O₂ evolution for 8%V₂O₅ (mass fraction) loaded TiO₂ catalyst is 118.2 µmol/(L·h) under UV irradiation, and 83.7 µmol/(L·h) under visible light irradiation.

Keywords

TiO₂ / V₂O₅ / photocatalytic activity / O₂ evolution

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