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Photocatalytic Hydrogen Evolution Performance and Photogenerated Charge Transfer Properties of p-Type Copper Sulfide

  • CHEMICAL KINETICS AND CATALYSIS
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Abstract

Two kinds of 3D hierarchically nanostructured CuS samples were synthesized via hydrothermal method and studied as photocatalysts for H2 evolution. Field-emission scanning electron microscopy (EF‑SEM) and X-ray diffraction (XRD) were used to characterize the samples. The rate of H2 evolution over CS1 sample is 459.8 μmol g–1 h–1, which is 9.4 times higher than that over CS2. CuS shows excellent photocatalytic H2 evolution activity only with Na2S and Na2SO3 as holes sacrificial agent. The transient photovoltage (TPV) measurement was used to study the surface photoelectric properties of the samples. Based on the photovoltage response, the influence of the transfer characteristics of photogenerated charge carriers on photocatalytic activity is discussed. The results indicate that the charge separation efficiency of CS1 is higher than that of CS2. The photogenerated charge carriers life time of CS1 is longer than that of CS2; this is the main reason of the higher photocatalytic activity of CS1.

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Funding

We are grateful for the financial support to the National Science Youth Foundation of China (no. 51704123) and Provincial Science Youth Foundation of Jiangsu (no. BK20160424).

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Authors and Affiliations

  1. College of Chemical Engineering, Key Laboratory for Palygorskite Science and Applied Technology of Jiangsu Province, National & Local Joint Engineering Research Center for Mineral Salt Deep Utilization, Huaiyin Institute of Technology, 223003, Huaian, China

    Lijing Zhang &  Jing Chen

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  1. Lijing Zhang
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  2. Jing Chen
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Correspondence to Lijing Zhang.

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Lijing Zhang, Jing Chen Photocatalytic Hydrogen Evolution Performance and Photogenerated Charge Transfer Properties of p-Type Copper Sulfide. Russ. J. Phys. Chem. 93, 2003–2008 (2019). https://doi.org/10.1134/S0036024419100339

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  • DOI: https://doi.org/10.1134/S0036024419100339

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