Chinese Journal of Catalysis ›› 2022, Vol. 43 ›› Issue (2): 403-409.DOI: 10.1016/S1872-2067(21)63844-5

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Ultrahigh photocatalytic hydrogen evolution performance of coupled 1D CdS/1T-phase dominated 2D WS2 nanoheterojunctions

Chao Ding, Chengxiao Zhao, Shi Cheng, Xiaofei Yang*()   

  1. College of Science, Nanjing Forestry University, Nanjing 210037, Jiangsu, China
  • Received:2021-02-28 Accepted:2021-04-18 Online:2022-02-18 Published:2021-05-24
  • Contact: Xiaofei Yang
  • Supported by:
    This work was supported by the National Natural Science Foundation of China(21975129);Science Fund for Distinguished Young Scholars(JC2019002);Nanjing Forestry University, and the Priority Academic Program Development of Jiangsu Higher Education Institutions(PAPD)

Abstract:

Solar-powered photocatalytic hydrogen production from water using semiconductors provides an eco-friendly and promising approach for converting solar energy into hydrogen fuel. Bulk semiconductors generally suffer from certain limitations, such as poor visible-light utilization, rapid recombination of charge carriers, and low catalytic capability. The key challenge is to develop visible-light-driven heterojunction photocatalysts that are stable and highly active during the water splitting process. Here, we demonstrate the integration of one-dimensional (1D) CdS nanorods with two-dimensional (2D) 1T-phase dominated WS2 nanosheets for constructing mixed-dimensional heterojunctions for the photocatalytic hydrogen evolution reaction (HER). The resulting 1D CdS/2D WS2 nanoheterojunction exhibited an ultrahigh hydrogen-evolution activity of ~70 mmol•g -1•h -1 that was visible to the naked eye, as well as long-term stability under visible light illumination. The results reveal that the synergy of hybrid nanoarchitectures and intimate interfacial contact between the 1D CdS nanorods and 1T-phase dominated 2D WS2 nanosheets facilitates charge carrier transport, which is beneficial for achieving superior hydrogen evolution.

Key words: Cadmium sulfide, Tungsten disulfide, Photocatalytic hydrogen evolution, Heterojunction, Interfacial coupling