Chinese Journal of Catalysis ›› 2017, Vol. 38 ›› Issue (2): 365-371.DOI: 10.1016/S1872-2067(16)62588-3

• Article • Previous Articles     Next Articles

Electrodeposition of Cu2O/g-C3N4 heterojunction film on an FTO substrate for enhancing visible light photoelectrochemical water splitting

Shengsen Zhanga,b, Jie Yana, Siyuan Yanga, Yuehua Xua, Xin Caia, Xin Lia, Xiangchao Zhangc, Feng Pengb, Yueping Fanga   

  1. a College of Materials and Energy, South China Agricultural University, Guangzhou 510643, Guangdong, China;
    b School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou 510641, Guangdong, China;
    c Hunan Key Laboratory of Applied Environmental Photocatalysis, Changsha University, Changsha 410022, Hunan, China
  • Received:2016-08-20 Revised:2016-10-29 Online:2017-02-18 Published:2017-03-14
  • Contact: 10.1016/S1872-2067(16)62588-3
  • Supported by:

    This work was supported by the National Natural Science Foundation of China (21173088), the Science and Technology Project of Guangdong Province (2014A030312007, 2015A050502012, 2016A010104013), the China Postdoctoral Science Foundation (2016M592493), and the Open Research Fund of Hunan Key Laboratory of Applied Environmental Photocatalysis (CCSU-XT-06), Changsha University.

Abstract:

An immobilized Cu2O/g-C3N4 heterojunction film was successfully made on an FTO substrate by electrophoretic deposition of g-C3N4 on a Cu2O thin film. The photoelectrochemical (PEC) performance for water splitting by the Cu2O/g-C3N4 film was better than pure g-C3N4 and pure Cu2O film. Under -0.4 V external bias and visible light irradiation, the photocurrent density and PEC hydrogen evolution efficiency of the optimized Cu2O/g-C3N4 film was -1.38 mA/cm2 and 0.48 mL h-1 cm-2, respectively. The enhanced PEC performance of Cu2O/g-C3N4 was attributed to the synergistic effect of light coupling and a matching energy band structure between g-C3N4 and Cu2O as well as the external bias.

Key words: Cuprous oxide, Graphitic carbon nitride, Heterojunction film, Electrodeposition, Visible light, Photoelectrochemical water splitting, Hydrogen evolution