Chem. J. Chinese Universities ›› 2023, Vol. 44 ›› Issue (8): 20230145.doi: 10.7503/cjcu20230145

• Physical Chemistry • Previous Articles     Next Articles

First-principles Study of Direct Z-scheme In2SSe/Sb Heterostructure as Photocatalyst for Water Splitting

CAO Shengzhe1, HUANG Xin2(), YANG Zhihong2   

  1. 1.College of Electronic and Optical Engineering,College of Flexible Electronics(Future Technology)
    2.College of Science,Nanjing University of Posts and Telecommunications,Nanjing 210023,China
  • Received:2023-03-29 Online:2023-08-10 Published:2023-05-16
  • Contact: HUANG Xin E-mail:xhuang@njupt.edu.cn
  • Supported by:
    the National Natural Science Foundation of China(11804165)

Abstract:

The photocatalytic properties of two-dimensional In2SSe/Sb van der Waals heterostructure were investi-gated via first-principles method. The results show that In2SSe/Sb heterostructure possesses the staggered band alignments with a direct band gap of 0.82 eV. As the built-in electric field is pointing from Sb to In2SSe at the interface, the In2SSe/Sb heterostructure exhibits type-Z mode, which is beneficial for effective electron-holes separations. Moreover, its band edges straddle water redox potentials and a strong optical absorption spectrum from visible light to ultraviolet light is obtained. Our study would offer theoretical understanding for designing In2SSe/Sb van der Waals heterostructure.

Key words: In2SSe/Sb, van der Waals heterostructure, First-principle, Photocatalysis

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