Abstract
Undoped K2La2Ti3O10 and Fe3+ doped K2La2Ti3O10 samples were prepared by the sol-gel method and characterized by X-ray diffraction(XRD) ,UV-Vis diffuse reflectance spectra(DRS) and X-ray photoelectron spectroscopy(XPS) . The effects of Fe3+ doping quantity on the properties and photocatalytic activity for hydrogen evolution were investigated. Results showed that Fe-doped K2La2Ti3O10 showed stronger absorption in the 400-650 nm range and this expanded to the visible light(λ400 nm) . Doping with Fe3+ raised the photocatalytic activity for hydrogen generation and the optimum amount of Fe3+ doping was found to be nFe/nTi=0.04. At this ratio and under visible light the rate of hydrogen evolution of Fe-K2La2Ti3O10 was 1.92 μmol·h-1 and this was 4 times higher than that of undoped K2La2Ti3O10 when 120 mL of reactive liquid(CH3OH(30 mL) +H2O(90 mL) ) containing 0.1 g photocatalyst was used.
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