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1D/2D CdS/WS 2 heterojunction photocatalyst: First-principles insights for hydrogen production

Materials Today Communications, ISSN: 2352-4928, Vol: 35, Page: 105991
2023
  • 11
    Citations
  • 0
    Usage
  • 4
    Captures
  • 1
    Mentions
  • 0
    Social Media
Metric Options:   Counts1 Year3 Year

Metrics Details

  • Citations
    11
    • Citation Indexes
      11
  • Captures
    4
  • Mentions
    1
    • News Mentions
      1
      • News
        1

Most Recent News

Findings in Photocatalytics Reported from Nanjing University of Aeronautics and Astronautics (1d/2d Cds/ws2 Heterojunction Photocatalyst: First-principles Insights for Hydrogen Production)

2023 AUG 31 (NewsRx) -- By a News Reporter-Staff News Editor at Nanotech Daily -- Investigators discuss new findings in Nanotechnology - Photocatalytics. According to

Article Description

1D/2D CdS/WS 2 heterojunctions have been considered to be efficient photocatalysts for visible-light driven hydrolysis; however, the catalytic mechanisms underpinning this behavior remain unclear. Here, a 1D/2D CdS/WS 2 heterojunction, with mechanical and thermodynamic stability, was designed and studied by first-principles calculations. The calculated results demonstrate that the CdS/WS 2 heterojunction exhibits a typical type-Ⅱ band arrangement. Through the synergistic effect of band offset together with a built-in electric field, photogenerated electrons and holes will each unidirectionally migrate to the conduction band of WS 2 and the valence band of CdS, respectively, thereby improving the utilization efficiency for solar energy. This is also indicated by the excellent visible light absorption of the CdS/WS 2 heterojunction. Excitingly, the oxidation and reduction potentials of the CdS/WS 2 heterojunction not only satisfy the requirements for water splitting, but further have very balanced oxidation and reduction reactions, which guarantees that the redox process can occur more efficiently. The above findings provide theoretical guidance for the design and understanding of efficient heterojunction photocatalysts based on 1D CdS nanostructures.

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