Chinese Journal of Catalysis ›› 2019, Vol. 40 ›› Issue (2): 168-176.DOI: 10.1016/S1872-2067(18)63191-2

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Highly enhanced visible-light photocatalytic hydrogen evolution on g-C3N4 decorated with vopc through π-π interaction

Yanan Liua,b, Liubo Maa, Congcong Shena, Xin Wanga, Xiao Zhoua, Zhiwei Zhaoa, Anwu Xua   

  1. a Division of Nanomaterials and Chemistry, Hefei National Laboratory for Physical Sciences at Microscale, Department of Chemistry Physics, University of Science and Technology of China, Hefei 230026, Anhui, China;
    b College of Biological Chemical Science and Engineering, Jiaxing University, Jiaxing 314001, Zhejiang, China
  • Received:2018-09-13 Revised:2018-10-23 Online:2019-02-28 Published:2019-01-11
  • Contact: 10.1016/S1872-2067(18)63191-2
  • Supported by:

    This work was supported by the National Natural Science Foundation of China (51572253, 21771171), Scientific Research Grant of Hefei National Synchrotron Radiation Laboratory (UN2017LHJJ), the Fundamental Research Funds for the Central Universities, and cooperation between NSFC and Netherlands Organization for Scientific Research (51561135011).


Photocatalytic H2 evolution reactions on pristine graphitic carbon nitrides (g-C3N4), as a promising approach for converting solar energy to fuel, are attractive for tackling global energy concerns but still suffer from low efficiencies. In this article, we report a tractable approach to modifying g-C3N4 with vanadyl phthalocyanine (VOPc/CN) for efficient visible-light-driven hydrogen production. A non-covalent VOPc/CN hybrid photocatalyst formed via π-π stacking interactions between the two components, as confirmed by analysis of UV-vis absorption spectra. The VOPc/CN hybrid photocatalyst shows excellent visible-light-driven photocatalytic performance and good stability. Under optimal conditions, the corresponding H2 evolution rate is nearly 6 times higher than that of pure g-C3N4. The role of VOPc in promoting hydrogen evolution activity was to extend the visible light absorption range and prevent the recombination of photoexcited electron-hole pairs effectively. It is expected that this facile modification method could be a new inspiration for the rational design and exploration of g-C3N4-based hybrid systems with strong light absorption and high-efficiency carrier separation.

Key words: VOPc/g-C3N4, π-&pi, Interaction, Visible light photocatalysis, Hydrogen evolution, Charge separation efficiency