4.7 Article

Synthesis of PDI/Zn0.8Cd0.2S composites for efficient visible light-driven photocatalytic overall water splitting

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DOI: 10.1016/j.jtice.2023.104693

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Zn0; 8Cd0; 2S; Perylene diimide; Visible-light-driven; Photocatalytic; Overall water splitting

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In this study, the PDI/Zn0.8Cd0.2S composite photocatalyst was synthesized and it exhibited a superior H2-evolution rate of 71.98 mu mol g-1 h-1 and an O2-evolution rate of 32.44 mu mol g-1 h-1, which is close to the stoichiometric ratio of 2:1. This composite photocatalyst has high charge separation efficiency and strong redox capacity, providing a new approach for the design of efficient photocatalytic systems for overall water splitting.
Background: Overall water splitting based on particulate photocatalysts under visible light irradiation is a cost-effective technology for the conversion of solar energy into renewable energy (hydrogen and oxygen).Methods: Herein, the perylene diimide (PDI)/Zn0.8Cd0.2S composite photocatalyst is synthesized for application in visible light driven photocatalytic overall water splitting.Significant findings: The PDI/Zn0.8Cd0.2S composite with 10 wt% PDI loading exhibits superior H2-evolution rate of 71.98 mu mol center dot g- 1 center dot h-1 and O2-evolution rate of 32.44 mu mol center dot g- 1 center dot h-1, which in a perfect stoichiometric ratio close to 2:1. The PDI/Zn0.8Cd0.2S with remarkable enhanced photocatalytic activity have the advantages of high charge separation efficiency and strong redox capacity. This work provided a new approach for the design of new type composite photocatalysts with efficient photocatalytic overall water splitting.

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