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ZnS@g-C3N4 Composite Photocatalysts: In Situ Synthesis and Enhanced Visible-Light Photocatalytic Activity

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Abstract

ZnS@g-C3N4 composite photocatalysts were synthesized by an in situ thermal polycondensation process under an inert atmosphere. The physicochemical properties of the ZnS@g-C3N4 composite photocatalysts were characterized by X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), transmission electron microscopy (TEM), UV–vis diffuse reflectance spectroscopy (UV–vis DRS), and photoluminescence (PL) spectroscopy. The characterization results displayed fine ZnS nanoparticles adhered to the surface of g-C3N4 nanosheets, and the presence of ZnS nanoparticles caused the split and exfoliation of g-C3N4 nanosheets. The ZnS@g-C3N4 composite photocatalysts exhibited the apparent visible-light absorption and the weakened recombination of photogenerated electron/hole pairs. The evaluation on photocatalytic degradation of rhodamine B (RhB) indicated the ZnS@g-C3N4 composite photocatalysts possessed large adsorption capacity and superior visible-light induced activity. Based on the trapping experiments of active species, the photocatalysis mechanism of the ZnS@g-C3N4 composite photocatalysts was also discussed.

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Acknowledgments

This work was financially supported by Shanghai Ocean University (Project: A2-0203-00-100529).

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Authors and Affiliations

  1. Department of Chemistry, College of Food Science and Technology, Shanghai Ocean University, Shanghai, 201306, China

    Bin Xue, Hai-Yun Jiang, Tao Sun & Fang Mao

Authors
  1. Bin Xue
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  2. Hai-Yun Jiang
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  3. Tao Sun
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  4. Fang Mao
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Correspondence to Bin Xue.

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Xue, B., Jiang, HY., Sun, T. et al. ZnS@g-C3N4 Composite Photocatalysts: In Situ Synthesis and Enhanced Visible-Light Photocatalytic Activity. Catal Lett 146, 2185–2192 (2016). https://doi.org/10.1007/s10562-016-1844-0

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