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<p>Metal-free, environmentally friendly photocatalysts offer a valuable alternative to conventional metal-based semiconductors. In this study, we developed a photocatalyst based on a covalent organic triazine polymer (COTP) using an efficient synthetic route. Comprehensive characterization was conducted to assess the physical (TEM, FESEM-EDS, and elemental mapping), chemical (FTIR and XRD), and optical (UV-Vis-DRS) properties of the synthesized photocatalyst and to evaluate its photocatalytic performance for the selective oxidation of tamoxifen (TMX) when exposed to visible light. The COTP exhibited remarkable photocatalytic efficiency, achieving a rate constant of 0.0599&#xa0;min<sup>− 1</sup> in degrading TMX. Optimal performance was obtained under the following conditions: a photocatalyst dose of 40&#xa0;mg/L, a pH of 7, an initial TMX concentration of 10&#xa0;mg/L, 60&#xa0;min of irradiation. Furthermore, radical trapping experiments revealed that electrons (e<sup>−</sup>), superoxide radicals (O•<sup>−</sup>), and holes (h•) play crucial roles in the photodegradation process of TMX. Additionally, the COTP exhibited excellent stability, maintaining over 83% TMX degradation efficiency even after five consecutive cycles. These results highlight the significant potential of triazine-based polymers for the treatment of drug-contaminated wastewater.</p>

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Visible light photocatalytic degradation of tamoxifen using covalent organic triazine polymer

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2025年12月8日

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  • Seyed Mohammad Amir Shah Karami,
  • Soheil Sobhanardakani,
  • Mehrdad Cheraghi,
  • Bahareh Lorestani,
  • Atefeh Chamani

摘要

Metal-free, environmentally friendly photocatalysts offer a valuable alternative to conventional metal-based semiconductors. In this study, we developed a photocatalyst based on a covalent organic triazine polymer (COTP) using an efficient synthetic route. Comprehensive characterization was conducted to assess the physical (TEM, FESEM-EDS, and elemental mapping), chemical (FTIR and XRD), and optical (UV-Vis-DRS) properties of the synthesized photocatalyst and to evaluate its photocatalytic performance for the selective oxidation of tamoxifen (TMX) when exposed to visible light. The COTP exhibited remarkable photocatalytic efficiency, achieving a rate constant of 0.0599 min− 1 in degrading TMX. Optimal performance was obtained under the following conditions: a photocatalyst dose of 40 mg/L, a pH of 7, an initial TMX concentration of 10 mg/L, 60 min of irradiation. Furthermore, radical trapping experiments revealed that electrons (e−), superoxide radicals (O•−), and holes (h•) play crucial roles in the photodegradation process of TMX. Additionally, the COTP exhibited excellent stability, maintaining over 83% TMX degradation efficiency even after five consecutive cycles. These results highlight the significant potential of triazine-based polymers for the treatment of drug-contaminated wastewater.