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

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)...

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Published in:International journal of hydrogen energy 2013-02, Vol.38 (6), p.2670-2677
Main Authors: Pei, Fuyun, Liu, Yingliang, Xu, Shengang, Lü, Jing, Wang, Chenxu, Cao, Shaokui
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Language:English
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cited_by cdi_FETCH-LOGICAL-c375t-88f31693dec441126db64616e94d23f55e9631147ecb1888bfa5531c9141596a3
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container_title International journal of hydrogen energy
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creator Pei, Fuyun
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description 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. [Display omitted] ► 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.
doi_str_mv 10.1016/j.ijhydene.2012.12.045
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subjects Catalysis
Catalysts: preparations and properties
Chemistry
Electron sink
Exact sciences and technology
General and physical chemistry
Graphene
Hydrogen evolution
Nitrogen-doping
Photocatalysis
Theory of reactions, general kinetics. Catalysis. Nomenclature, chemical documentation, computer chemistry
title Nanocomposite of graphene oxide with nitrogen-doped TiO2 exhibiting enhanced photocatalytic efficiency for hydrogen evolution
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