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<p>Advanced oxidation processes (AOPs) have emerged as highly effective methods for removing pharmaceutical residues from aquatic environments. These residues pose significant risks to human health and the environment, highlighting the need for efficient and sustainable technologies. In this study, a ZnO-CuO-Al<sub>2</sub>O<sub>3</sub> heterojunction was successfully synthesized using a chemical method and tested for the photodegradation of cyproheptadine (CY) under LED light irradiation. The effects of various parameters, including pH, catalyst dose, and initial pollutant concentration on the removal process were evaluated and discussed. Under optimum conditions at room temperature, an initial Cy concentration of 20&#xa0;mg/L, a ZnO-CuO-Al<sub>2</sub>O<sub>3</sub> catalyst dose of 1&#xa0;g/L and a pH 7, the photocatalytic removal efficiency of CY reached 90% after 120&#xa0;min of treatment. Additionally, 60% of dissolved organic carbon (DOC) and 55% of total organic carbon (TOC) were removed. This removal efficiency is four times greater than that achieved using ZnO and CuO-Al<sub>2</sub>O<sub>3</sub> materials separately. Radical trapping tests identified OH<sup>•</sup> and O<sub>2</sub><sup>•−</sup> as the primary reactive species responsible for the catalytic degradation of CY.</p> Graphical Abstract <p></p>

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ZnO-CuO-Al2O3 Heterojunction Photocatalyst for Photodegradation of Cyproheptadine

  • 期刊论文

  • 发表日期：

    2025年7月31日

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  • Hanane Zazoua,
  • Djalila Guettaia,
  • Amel Boudjemaa,
  • Khaldoun Bacharı

摘要

Advanced oxidation processes (AOPs) have emerged as highly effective methods for removing pharmaceutical residues from aquatic environments. These residues pose significant risks to human health and the environment, highlighting the need for efficient and sustainable technologies. In this study, a ZnO-CuO-Al2O3 heterojunction was successfully synthesized using a chemical method and tested for the photodegradation of cyproheptadine (CY) under LED light irradiation. The effects of various parameters, including pH, catalyst dose, and initial pollutant concentration on the removal process were evaluated and discussed. Under optimum conditions at room temperature, an initial Cy concentration of 20 mg/L, a ZnO-CuO-Al2O3 catalyst dose of 1 g/L and a pH 7, the photocatalytic removal efficiency of CY reached 90% after 120 min of treatment. Additionally, 60% of dissolved organic carbon (DOC) and 55% of total organic carbon (TOC) were removed. This removal efficiency is four times greater than that achieved using ZnO and CuO-Al2O3 materials separately. Radical trapping tests identified OH• and O2•− as the primary reactive species responsible for the catalytic degradation of CY.

Graphical Abstract