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Core–shell g-C3N4@Zn0.5Cd0.5S heterojunction photocatalysts with high photocatalytic activity for the degradation of organic dyes

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Abstract

The core-shell g-C3N4@Zn0.5Cd0.5S heterojunction photocatalysts with excellent photocatalytic performance were synthesized via a simple co-precipitation hydrothermal method. The photocatalytic performance of the g-C3N4@Zn0.5Cd0.5S was significantly increased by the heterojunction structure, which improved the separation and mobility of the photogenerated carriers. The highest degradation efficiency was for the 50% g-C3N4@Zn0.5Cd0.5S (99%), and its degradation rate was 15.7 which was 3.7 times those of the pure g-C3N4 and Zn0.5Cd0.5S, respectively. The catalyst band gap gradually decreased with the increasing content of g-C3N4. The capture agent experiments revealed that the main active substances in the degradation process are h+ and O2−·. The photocatalytic activity remained at 95% after 4 cycles showing good light stabilities. This study provided a simple method for synthesizing the g-C3N4/ZnCdS heterojunctions with an excellent photocatalytic property.

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Acknowledgements

The project was supported by National Youth Fund Project of China (Grant No. 51404083).

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Correspondence to Shuyan Qi.

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Qi, S., Wang, D., Zhao, Y. et al. Core–shell g-C3N4@Zn0.5Cd0.5S heterojunction photocatalysts with high photocatalytic activity for the degradation of organic dyes. J Mater Sci: Mater Electron 30, 5284–5296 (2019). https://doi.org/10.1007/s10854-019-00828-w

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  • DOI: https://doi.org/10.1007/s10854-019-00828-w

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