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Mechanistic Study of CrS2/BP as a Direct Z-Scheme Heterojunction for Photocatalyst of Splitting Water Under Biaxial Strain

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Abstract

Semiconductor photocatalysts are hampered by carriers' recombination problems that hinder their practical application. The rational design of direct Z-scheme heterojunctions based on two-dimensional (2D) materials is one of the effective ways to solve this problem. Therefore, we predicted 2D CrS2/boron phosphide (BP) van der Waals heterojunction as a potential direct Z-scheme photocatalyst based on density functional theory. The CrS2/BP heterojunction has a small direct band gap, which is favorable for light absorption. In addition, the built-in electric field promotes the separation and transfer of the desired carriers. Photogenerated electrons and holes are localized in the conduction band of the BP component and the valence band of the CrS2 component, respectively. In addition, it was found that the heterojunction obtained a relatively small band gap and a wide optical absorption range at + 4% and + 5% strains. Therefore, the CrS2/BP heterojunction is a new photocatalyst satisfying the direct Z-scheme charge transfer mechanism, which has a certain application value.

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Funding

Funding was provided by the Technology Coordination Innovation Project of Shaanxi province (Grant No.: S2018-ZC-PT-0024)

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Authors and Affiliations

  1. Xi’an University of Technology, Xi’an, China

    Shihan Zhao, Xianbin Zhang & Jiameng Cao

Authors
  1. Shihan Zhao
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  2. Xianbin Zhang
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  3. Jiameng Cao
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Contributions

SZ: Writing—original draft, Conceptualization, Methodology, Investigation, Software, Writing—review & editing. XZ: Conceptualization, Resources, Supervision. JC: Investigation, Methodology, Software, Formal analysis.

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Correspondence to Xianbin Zhang.

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Zhao, S., Zhang, X. & Cao, J. Mechanistic Study of CrS2/BP as a Direct Z-Scheme Heterojunction for Photocatalyst of Splitting Water Under Biaxial Strain. Catal Lett 154, 60–70 (2024). https://doi.org/10.1007/s10562-022-04224-8

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  • DOI: https://doi.org/10.1007/s10562-022-04224-8

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