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    Photocatalytic activity of vanadium-doped titania–activated carbon composite film under visible light

    Year: 2009

    Journal: Thin Solid Films, 20111221

    Authors: Jingjing Xu, Yanhui Ao, Mindong Chen, Degang Fu and Chunwei Yuan

    Organizations: College of Environmental Science and Engineering, Nanjing University of Information Science and Technology, Nanjing 210044, China, College of Environmental Science and Engineering, Hohai University, Nanjing 210092, China, State Key Laboratory of Bioelectronics, Southeast University, Nanjing 210096, China

    A V-doped titania–activated carbon composite film was prepared by a modified sol–gel method under mild condition. X-ray diffraction analysis revealed that the titania was a pure anatase phase. From scanning electron microscopy and N2 adsorption–desorption measurements, we found that the composite film was porous since it formed a micro–nano structure. The photocatalytic activity of such film was evaluated through degradation of azo-dye Reactive Brilliant Red under visible light, and was compared to commercially available TiO2, pure titania and vanadium-doped titania films. Results showed that the photocatalytic activity was enhanced a lot. It was due to expansion of the absorption edge by vanadium doping, and the synergistic effect of activated carbon with titania. Furthermore, the hydrophilic property of the as-prepared composite film was superior to other samples.