کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1273798 | 1497539 | 2013 | 8 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Nanocomposite of graphene oxide with nitrogen-doped TiO2 exhibiting enhanced photocatalytic efficiency for hydrogen evolution Nanocomposite of graphene oxide with nitrogen-doped TiO2 exhibiting enhanced photocatalytic efficiency for hydrogen evolution](/preview/png/1273798.png)
The application of hydrogen energy potentially addresses energy and environmental problems. In order to improve the photocatalytic efficiency, nanocomposite of N-doped TiO2 with graphene oxide (NTG) is prepared and characterized with Fourier transform infrared spectra (FTIR), X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), Raman spectra, X-ray photoelectron spectroscopy (XPS), atomic force microscope (AFM), photoluminescent spectra. The application of NTG to hydrogen evolution exhibits high photocatalytic efficiency of 716.0 or 112.0 μmol h−1 g−1 under high-pressure Hg or Xenon lamp, which is about 9.2 or 13.6 times higher than P25 photocatalyst. This is mainly attributed to the N-doping of TiO2 and the incorporation of graphene oxide resulting in narrow band gap, together with the synergistic effect of fast electron-transporting of photogenerated electrons and the efficient electron-collecting of graphene oxide retarding charge recombination. These results provide a significant theoretical foundation for the potential application of N-doping photocatalysts to hydrogen evolution.
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► Nanocomposite of N–TiO2 with graphene oxide is prepared by hydrothermal process.
► NTG exhibits high photocatalytic efficiency in hydrogen evolution.
► Photocatalytic efficiency of NTG is improved from N-doped TiO2 and graphene oxide.
► Nitrogen-doping of TiO2 is to narrow band gap and to enhance light absorption.
► Fast electron-transporting and efficient electron-collecting is synergistic.
Journal: International Journal of Hydrogen Energy - Volume 38, Issue 6, 27 February 2013, Pages 2670–2677