| Titanium dioxide have attracted considerable attention in many fields, especially about environment and energy because of its high catalytic activity, low selectivity, no secondary pollution, non-toxicity and low cost. TiO2 nanotubes have become a kind of widely used and environment al friendly nano material due to its excellent properties of electronic and photonic, catalysis, gas sensitivity. Therefore, controlling the morphology of TiO2 nanotubes and improving the catalytic activity and visible responsibility is considerable theoretical and practical. It will provide a possible industrial application of TiO2 materials.In this paper, we first prepared TiO2 nanotubes by hydrothermal method using P25 powder, and then successfully decorated which with Fe2O3 nano-particles (Fe2O3/TiO2 nanotubes). The samples were characterized by Transmission electron microscope (TEM), X-ray diffraction (XRD), Fourier Transform Infrared Spectrometer (FT-IR), BET and X-ray photoelectron spectroscopy (XPS). And the effect of acid concentration, and annealed temperature and time on the properties of photocatalysts was investigated in details.The photocatalytic activity of Fe2O3/TiO2 nanotubes was evaluated by photo-degradation of reactive X-3B dye under visible light (the wavelength of light higher than 480 nm) in the presence of H2O2, and the influence of different pH on the degradation performance was discussed. Results shows that the Fe2O3/TiO2 nanotubes sample exhibited higher photocatalytic activity than bare TiO2 nanotubes. The decolorization rate of X-3B was as high as 99.5% after 120 min photocatalytic reaction.The catalyst can be applied in a wide range of pH values. Besides, the Fe2O3 supported on the surface of TiO2 nanotubes was quite stable. |
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