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Preparation and Properties of CdS/Spherical g-C3N4 n-n Heterojunction as a Visible-Light-Driven Photocatalyst for Tetracycline Degradation

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Abstract

The CdS/ spherical g-C3N4 n-n heterojunction photocatalyst was fabricated via a solvothermal method. The tetracycline was used to characterize the photocatalytic properties of the as-developed hybrids. The photocatalytic degradation mechanism of the as-developed heterojunction photocatalyst was also analyzed. Research results show that CdS nanoparticles are well dispersed in the surface layer of spherical g-C3N4. Moreover, the mass ratio of CdS to spherical g-C3N4 will influence the photocatalytic activity of the asdeveloped composites, which shows the trend of first increasing and then decreasing as it increased. When the mass ratio is 7:1, in 25 min, the as-developed heterojunction shows 93.2 % of the maximum photocatalytic efficiency and still exhibits 83.6 % after 5 times cycle testing. Moreover, the as-developed hybrids can accelerate the electron transport and improve the separation efficiency of photo-generated carriers compared with pure samples. In addition, the holes and superoxide radicals are dominating active species during the photocatalytic degradation process.

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Authors and Affiliations

  1. School of Materials Science and Engineering, Hebei Provincial Key Laboratory of Traffic Engineering Materials, Shijiazhuang Tiedao University, Shijiazhuang, 050043, China

    Junzhang Su  (苏俊章), Xiangfeng Wu  (吴湘锋), Chenxu Zhang, Hui Wang  (王惠), Mi Zhang, Jiarui Zhang, Yunning Jia, Yanan Cui, Xin Tong, Jialu Shang & Chenyu Zhang

  2. Tianjin Key Laboratory of Building Green Functional Materials, Tianjin Chengjian University, Tianjin, 300384, China

    Junzhang Su  (苏俊章)

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  1. Junzhang Su  (苏俊章)
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  2. Xiangfeng Wu  (吴湘锋)
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  4. Hui Wang  (王惠)
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  5. Mi Zhang
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  11. Chenyu Zhang
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Correspondence to Xiangfeng Wu  (吴湘锋) or Hui Wang  (王惠).

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Funded by the Natural Science Foundation of Hebei Province, China (Nos. E2019210251 and B2019210331)

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Su, J., Wu, X., Zhang, C. et al. Preparation and Properties of CdS/Spherical g-C3N4 n-n Heterojunction as a Visible-Light-Driven Photocatalyst for Tetracycline Degradation. J. Wuhan Univ. Technol.-Mat. Sci. Edit. 35, 99–106 (2020). https://doi.org/10.1007/s11595-020-2232-6

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