Nanocomposite of graphene oxide with nitrogen-doped TiO₂ exhibiting enhanced photocatalytic efficiency for hydrogen evolution

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• 作者：Fuyun Pei ; Yingliang Liu ; Shengang Xu ; ^{xushengang@zzu.edu.cn} ; Jing Lü ; Chenxu Wang ; Shaokui Cao ; ^{caoshaokui@zzu.edu.cn}
• 关键词：Hydrogen evolution ; Graphene ; Photocatalysis ; Nitrogen-doping ; Electron sink
• 刊名：International Journal of Hydrogen Energy
• 出版年：2013
• 出版时间：27 February, 2013
• 年：2013
• 卷：38
• 期：6
• 页码：2670-2677
• 全文大小：1071 K

文摘

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?¦Ìmol?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.