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Phase-Controlled Multi-Dimensional-Structure SnS/SnS2/CdS Nanocomposite for Development of Solar-Driven Hydrogen

Rak Hyun Jeong1,2, Jae Hyeong Lee1, Jin-Hyo Boo2,3

  • 1Department of Electrical and Computer Engineering, Sungkyunkwan University, Suwon 440-746, Republic of Korea.

International Journal of Molecular Sciences
|September 28, 2023
PubMed
Summary

This study developed novel CdS/SnS/SnS2 photocatalysts for efficient hydrogen production and Cr(VI) removal. The core-shell structure optimizes performance by enhancing light absorption and electron transfer, offering a sustainable energy solution.

Keywords:
2D materialsenvironment pollutant removalhydrogen evolutionnanocompositesolar-driven photocatalyst

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Area of Science:

  • Materials Science
  • Photocatalysis
  • Sustainable Energy

Background:

  • Two-dimensional (2D) materials are crucial for developing efficient water-splitting photocatalysts to generate hydrogen, a clean energy source.
  • Tin sulfide (SnS) and tin disulfide (SnS2) exhibit promising photocatalytic properties due to their electronic structures and morphology.
  • CdS is known for broad light absorption but suffers from mineral corrosion.

Purpose of the Study:

  • To synthesize and characterize novel CdS/SnS/SnS2 composite photocatalysts.
  • To investigate the photocatalytic efficiency of these composites for hydrogen generation and Cr(VI) removal.
  • To understand the role of the composite structure in enhancing photocatalytic activity and stability.

Main Methods:

  • Solvothermal synthesis method was employed to create CdS/SnS/SnS2 composites.
  • Characterization techniques were used to confirm the core-shell structure and phase composition.
  • Photocatalytic activity was evaluated through hydrogen generation and Cr(VI) degradation experiments over 120 minutes.

Main Results:

  • The CdS/SnS/SnS2 composite exhibited a core-shell structure with CdS successfully deposited on SnS/SnS2.
  • Optimal photocatalytic performance was achieved when the SnS/SnS2 phase ratio was dominated by SnS.
  • The composite demonstrated high efficiency in photocatalytic hydrogenation and Cr(VI) removal, alongside enhanced photogenerated carrier separation and prevention of CdS corrosion.

Conclusions:

  • The developed CdS/SnS/SnS2 composite is a highly efficient photocatalyst for hydrogen production and pollutant degradation.
  • The core-shell structure and optimized phase ratio significantly improve light absorption, electron transfer, and carrier separation.
  • This material offers a stable and effective solution for sustainable energy generation and environmental remediation.