Wide-spectrum response urchin-like Bi2S3 spheres and ZnS quantum dots co-decorated mesoporous g-C3N4 nanosheets heterojunctions for promoting charge separation and enhancing photothermal-photocatalytic performance

Wide-spectrum response ZnS quantum dots/urchin-like Bi2S3 spheres/mesoporous g-C3N4 nanosheets ternary photocatalysts are prepared via the hydrothermal and template-calcination processes

Hao Jiang; Zipeng Xing; Zhenzi Li; Kai Pan; Zekang Yang; Ke Wang; Meijun Guo; Shilin Yang; Wei Zhou

2020

Scholarcy highlights

  • Wide-spectrum response ZnS quantum dots/urchin-like Bi2S3 spheres/mesoporous g-C3N4 nanosheets ternary photocatalysts are prepared via the hydrothermal and template-calcination processes
  • The deposited ZnS quantum dots with the size of ~10 nm are bedecked on the surface of mesoporous g-C3N4 nanosheets uniformly
  • Mesoporous g-C3N4 performs as a bridge for electrons transferring among the three semiconductor photocatalysts in ternary heterojunction structure
  • The photocatalytic H2 evolution for ZnS/Bi2S3/mesoporous g-C3N4 reaches to 663.3 µmol h−1 g−1 under the sunlight irradiation, which is approximately 5 times higher than that of pristine mesoporous g-C3N4; the photocatalytic degradation of Bisphenol A is up to 98.8% under the visible light irradiation; Surprisingly, the apparent reaction rate constant of ZnS/Bi2S3/mesoporous g-C3N4 is approximately 5 times higher than mesoporous g-C3N4
  • ZnS quantum dots/Urchin-like Bi2S3 spheres/Meso-g-C3N4 nanosheets heterojunctions photocatalysts are fabricated via hydrothermal and template-calcination strategies and show excellent visible-light-driven photothermal-photocatalytic performance, which could be ascribed to the formation of heterojunctions and mesoporous structure favoring the spatial separation of photogenerated charge carriers and offering more surface active sites

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