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<p>A CuO/g-C<sub>3</sub>N<sub>4</sub> composite catalyst was synthesized via a one-step hydrothermal-calcination method. The load of CuO on g-C<sub>3</sub>N<sub>4</sub> was confirmed by characterization methods, while maintaining the inherent structure of the g-C<sub>3</sub>N<sub>4</sub> matrix. Comprehensive characterization using SEM, XRD, FT-IR, and XPS confirmed the successful deposition of CuO on g-C<sub>3</sub>N<sub>4</sub> while preserving the intrinsic structure of the g-C<sub>3</sub>N<sub>4</sub> matrix. The photocatalytic performance was evaluated through phenol degradation in a peroxydisulfate assisted system under visible light irradiation. The composite exhibited remarkable catalytic activity, achieving 83.52% phenol removal efficiency within the reaction period. Notably, the catalyst maintained 68.89% degradation efficiency after five consecutive cycles, demonstrating excellent recyclability. Mechanistic studies through radical quenching experiments and XPS analyses revealed that the degradation process predominantly follows a radical pathway, where photogenerated holes and sulfate radicals play pivotal roles.</p> Graphical Abstract

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CuO/g-C3N4 Photocatalytic Synergistic Persulfate Activation for Degradation of Phenol Wastewater

  • 期刊论文

  • 发表日期：

    2025年8月22日

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  • Yanchen Shang,
  • Lei Chao,
  • Fang Sun,
  • Shiyuan Chen

摘要

A CuO/g-C3N4 composite catalyst was synthesized via a one-step hydrothermal-calcination method. The load of CuO on g-C3N4 was confirmed by characterization methods, while maintaining the inherent structure of the g-C3N4 matrix. Comprehensive characterization using SEM, XRD, FT-IR, and XPS confirmed the successful deposition of CuO on g-C3N4 while preserving the intrinsic structure of the g-C3N4 matrix. The photocatalytic performance was evaluated through phenol degradation in a peroxydisulfate assisted system under visible light irradiation. The composite exhibited remarkable catalytic activity, achieving 83.52% phenol removal efficiency within the reaction period. Notably, the catalyst maintained 68.89% degradation efficiency after five consecutive cycles, demonstrating excellent recyclability. Mechanistic studies through radical quenching experiments and XPS analyses revealed that the degradation process predominantly follows a radical pathway, where photogenerated holes and sulfate radicals play pivotal roles.

Graphical Abstract