Citation:
WANG Bao-wei, SUN Qi-mei, LI Yan-ping, LIU Si-han. Photocatalytic activity of nano-CuO/TiO2 composites prepared by a simple impregnated method[J]. Journal of Fuel Chemistry and Technology,
;2013, 41(6): 741-747.
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CuO/TiO2 composites were prepared by a simple impregnated method with Cu(NO3)2·3H2O and P25 as precursors. The characteristic of photocatalysts were analyzed by N2-physisorption, XRD, TEM, UV-vis DRS spectra. In this paper, the effects of Cu content, the scattered catalyst amount, calcination temperature of the photocatalyst and methanol concentration for the photocatalytic activity of CuO/TiO2 composites were studied. We also investigated the stability of the catalyst and proposed a mechanism of the photocatalytic process. The results suggested that the appropriate content of Cu component in CuO/TiO2 is 2.0%~7.5% and hydrogen production rate can reach 1 022 μmol/(h·g) at 2.0% of Cu content, 10% of methanol concentration, 350℃ of calcination temperature and 1.0 g/L of scattered catalyst amount. It was also demonstrated that CuO/TiO2 photocatalyst had a stable activity for H2 evolution.
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Keywords:
- TiO2,
- CuO,
- photocatalyst,
- hydrogen,
- visible light
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