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Construction of strongly coupled 2D-2D SnS/CdS S-scheme heterostructures for photocatalytic hydrogen evolution

Sustainable Energy and Fuels, ISSN: 2398-4902, Vol: 7, Issue: 5, Page: 1311-1321
2023
  • 13
    Citations
  • 0
    Usage
  • 9
    Captures
  • 1
    Mentions
  • 0
    Social Media
Metric Options:   Counts1 Year3 Year

Metrics Details

  • Citations
    13
    • Citation Indexes
      13
  • Captures
    9
  • Mentions
    1
    • News Mentions
      1
      • 1

Most Recent News

Investigators at Harbin Institute of Technology Describe Findings in Photocatalytics (Construction of Strongly Coupled 2d-2d Sns2/cds S-scheme Heterostructures for Photocatalytic Hydrogen Evolution)

2023 MAR 21 (NewsRx) -- By a News Reporter-Staff News Editor at Nanotech Daily -- Investigators publish new report on Nanotechnology - Photocatalytics. According to

Article Description

The fabrication of neoteric photocatalysts with high-efficiency charge separation for the solar-driven hydrogen evolution reaction (HER) remains a challenge. The construction of strongly coupled two-dimensional (2D)-2D heterostructures facilitates charge spatial migration due to the regulation of the interlayer forces and electronic structures. In this work, we demonstrate novel 2D-2D SnS/CdS heterostructures by loading SnS nanosheets (SnS NSs) onto CdS nanosheets (CdS NSs). The SnS/CdS heterostructures possess close face-to-face contact and strongly coupled interactions to improve the charge transfer kinetics, and the loading of SnS can enhance light absorption and suppress the photocorrosion of CdS. The optimized S-scheme SnS/CdS heterostructures exhibit excellent photocatalytic hydrogen evolution activity in lactic acid sacrificial solution under visible light (λ ≥ 420 nm), affording the highest hydrogen evolution rate on SnS/CdS heterostructures with 35 wt% SnS (5.18 mmol g h), which is approximately 6-fold higher than that of pure CdS NSs (0.87 mmol g h). In addition, a highest apparent quantum efficiency (AQE) of 59.3% was obtained at 420 nm. When methanol was used as the sacrificial agent, the hydrogen production rate reached 3.27 mmol g h and methanol was oxidatively reformed into methoxymethanol (CHOCHOH). This work provides a feasible method for designing strongly coupled 2D-2D heterostructure photocatalysts for energy storage and conversion applications.

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