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<p>Lignin quantum carbon dots (CQDs) were prepared using basic lignin as the carbon source. They were loaded onto Z-type ZnIn<sub>2</sub>S<sub>4</sub>/WO<sub>3</sub> heterojunction semiconductor materials by a one-step hydrothermal method to construct a ternary composite photocatalyst. Taking the photocatalytic water hydrogen evolution reaction performance as an indicator, it was found that the 33% CQDs/ZnIn<sub>2</sub>S<sub>4</sub>/WO<sub>3</sub> composite photocatalyst exhibited the highest hydrogen evolution reaction rate of 15.355&#xa0;mmol·h<sup>−1</sup>·g<sup>−1</sup>, which was twice as high as that of ZnIn<sub>2</sub>S<sub>4</sub>/WO<sub>3</sub> (7.522&#xa0;mmol·h<sup>−1</sup>·g<sup>−1</sup>). This study successfully constructed CQDs/ZnIn<sub>2</sub>S<sub>4</sub>/WO<sub>3</sub> tenary heterojunction photocatalyst with excellent and stable hydrogen production performance, which fully demonstrated the feasibility of loading lignin-based CQDs to enhance the photocatalytic performance of ZnIn<sub>2</sub>S<sub>4</sub> for high-value utilization of lignin.</p>

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Property of CQDs/ZnIn2S4/WO3 heterojunction catalysts for photocatalytic hydrogen production performance

  • 期刊论文

  • 发表日期：

    2025年11月21日

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  • Shanshan Wang,
  • Kai Zhang,
  • Oxana P. Taran,
  • Siqi Li,
  • Fubao Sun,
  • Hong Yan,
  • Fen Li

摘要

Lignin quantum carbon dots (CQDs) were prepared using basic lignin as the carbon source. They were loaded onto Z-type ZnIn2S4/WO3 heterojunction semiconductor materials by a one-step hydrothermal method to construct a ternary composite photocatalyst. Taking the photocatalytic water hydrogen evolution reaction performance as an indicator, it was found that the 33% CQDs/ZnIn2S4/WO3 composite photocatalyst exhibited the highest hydrogen evolution reaction rate of 15.355 mmol·h−1·g−1, which was twice as high as that of ZnIn2S4/WO3 (7.522 mmol·h−1·g−1). This study successfully constructed CQDs/ZnIn2S4/WO3 tenary heterojunction photocatalyst with excellent and stable hydrogen production performance, which fully demonstrated the feasibility of loading lignin-based CQDs to enhance the photocatalytic performance of ZnIn2S4 for high-value utilization of lignin.