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Published on: May 4, 2016
A new approach toward carbon-modified vanadium-doped titanium dioxide photocatalysts
Haibei Liu1, Yongmei Wu, Jinlong Zhang
1Key Lab for Advanced Materials and Institute of Fine Chemicals, East China University of Science and Technology, 130 Meilong Road, Shanghai 200237, P. R. China.
Abstract:
Carbon-modified vanadium-doped TiO₂ was successfully prepared with the intention of enhancing the visible-light photocatalytic performance by expanding the absorption in the visible-light region and improving the quantum efficiency of the photocatalytic reaction. The physicochemical properties of the catalysts were characterized by XRD, Raman, TEM, XPS, UV-vis diffuse reflectance spectra. The result indicated that some vanadium ions substituted for Ti⁴⁺ in the lattice of TiO₂, whereas all the carbon was modified on the surface of catalysts in the form of stable graphite-like carbonaceous species. Compared with vanadium doped TiO₂ sample and carbon modified TiO₂ sample, the 0.32C-0.5%V-TiO₂ photocatalyst exhibited excellent visible light activity and the synergistic effects of vanadium and carbon was responsible for improving the photocatalytic activity.
