Chinese Journal of Catalysis ›› 2019, Vol. 40 ›› Issue (8): 1198-1204.DOI: 10.1016/S1872-2067(19)63387-5

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Immobilization of metal-organic molecular cage on g-C3N4 semiconductor for enhancement of photocatalytic H2 generation

Yuanpu Wanga, Liang Liua, DongJun Wua, Jing Guoa, Jianying Shia, Junmin Liua, Chengyong Sua,b   

  1. a MOE Laboratory of Bioinorganic and Synthetic Chemistry, Lehn Institute of Functional Materials, School of Chemistry, and School of Materials Science and Engineering, Sun Yat-sen University, Guangzhou 510275, Guangdong, China;
    b State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, Shanghai 200032, China
  • Received:2019-03-01 Revised:2019-04-26 Online:2019-08-18 Published:2019-06-21
  • Supported by:
    This work was supported by the National Natural Science Foundation of China (21875293, 21821003, 21890380, 21720102007, 21572280), the Natural Science Foundation of Guangdong Province (2016A030313268), the STP Project of Guangzhou (201804010386, 201707010114), the Fundamental Research Funds for the Central Universities (17lgzd18, 17lgzd01), and the Research Fund Program of Key Laboratory of Fuel Cell Technology of Guangdong Province.

Abstract: A new compound based on immobilizing of Pd6(RuL3)8(BF4)28 (L=2-(pyridin-3-yl)-1H-imidazo[4,5-f] [1,10]-phenanthroline) cage (MOC-16) on g-C3N4 was synthesized. Infrared spectrum and powder X-ray diffraction were used to characterize structure of hybrid MOC-16/g-C3N4, as well as UV-vis absorption spectrum and X-ray photoelectron spectroscopy were carried out to unveil photocatalytic mechanism. With the introduction of MOC-16, the absorption edge of MOC-16/g-C3N4 in UV-vis spectrum extended apparently to long-wavelength region compared with pristine g-C3N4. H2 evolution yielded with MOC-16/g-C3N4 in aqueous solution containing TEOA was much higher than that with RuL3/g-C3N4, Pd/RuL3/g-C3N4 and mixture of MOC-16 and g-C3N4, showing that the octahedral cage structure with high-efficient electron transfer and the interface interaction between MOC-16 and g-C3N4 were significant for improvement of H2 evolution.

Key words: g-C3N4, Metal-organic cage, Photocatalytic H2 evolution, Visible light, Stability