Chinese Journal of Catalysis

Chinese Journal of Catalysis ›› 2019, Vol. 40 ›› Issue (3): 390-402.DOI: 10.1016/S1872-2067(18)63173-0

• Articles • Previous Articles     Next Articles

Controllable design of Zn-Ni-P on g-C3N4 for efficient photocatalytic hydrogen production

Yanbing Lia,b, Zhiliang Jina,b, Lijun Zhanga,b, Kai Fana,b   

  1. a School of Chemistry and Chemical Engineering, North Minzu University, Yinchuan 750021, Ningxia, China;
    b Key Laboratory for Chemical Engineering and Technology, State Ethnic Affairs Commission, North Minzu University, Yinchuan 750021, Ningxia, China
  • Received:2018-08-09 Revised:2018-09-20 Online:2019-03-18 Published:2019-02-22
  • Supported by:

    This work was supported by the National Natural Science Foundation of China (21862002, 41663012), the Innovation Team Project of North Minzu University (YCX18082), and the Scientific Research Project of North Minzu University (2016 HG-KY 06).

PDF (PC)

1087

Abstract:

Synthesizing a stable and efficient photocatalyst has been the most important research goal up to now. Owing to the dominant performance of g-C3N4 (graphitized carbonitride), an ordered assemble of a composite photocatalyst, Zn-Ni-P@g-C3N4, was successfully designed and controllably prepared for highly efficient photocatalytic H2 evolution. The electron transport routes were successfully adjusted and the H2 evolution was greatly improved. The maximum amount of H2 evolved reached about 531.2 μmol for 5 h over Zn-Ni-P@g-C3N4 photocatalyst with a molar ratio of Zn to Ni of 1:3 under illumination of 5 W LED white light (wavelength 420 nm). The H2 evolution rate was 54.7 times higher than that over pure g-C3N4. Moreover, no obvious reduction in the photocatalytic activity was observed even after 4 cycles of H2 production for 5 h. This synergistically increased effect was confirmed through the results of characterizations such as XRD, TEM, SEM, XPS, N2 adsorption, UV-vis DRS, transient photocurrent, FT-IR, transient fluorescence, and Mott-Schottky studies. These studies showed that the Zn-Ni-P nanoparticles modified on g-C3N4 provide more active sites and improve the efficiency of photogenerated charge separation. In addition, the possible mechanism of photocatalytic H2 production is proposed.

Key words: Zn-Ni-P, g-C3N4, H2 production, Controllable design, Photocatalyst