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<p>The persistent presence of antibiotic residues in aquatic environments poses significant environmental and public health concerns, necessitating the development of efficient and sustainable treatment strategies. In this study, a hybrid CuO/Cu₂O nanostructured catalyst was synthesized via thermal decomposition and applied in a UV-assisted photo-Fenton-like system for the degradation of Achromycin. Structural characterization confirmed the formation of mixed-phase CuO/Cu₂O with a porous rosette-like morphology and an average crystallite size of 40&#xa0;nm, providing abundant active sites. The CuO/Cu₂O–H₂O₂ –UV system achieved up to 94% degradation within 60&#xa0;min at near-neutral pH (6.4), demonstrating a clear advantage over conventional Fenton processes that require acidic conditions. The enhanced performance is attributed to the synergistic CuO/Cu₂O heterojunction, which promotes efficient Cu(I)/Cu(II) redox cycling and sustained generation of hydroxyl radicals (•OH). UV irradiation primarily enhances H₂O₂ photolysis and accelerates redox regeneration rather than acting as a direct photocatalytic excitation source. Kinetic analysis followed pseudo-first-order behavior (R² = 0.92–0.99), while thermodynamic evaluation revealed an exothermic process with negative activation energy. RSM predicted an optimal removal efficiency of 96%, which was experimentally validated. The catalyst exhibited good stability, retaining appreciable activity after six reuse cycles reached 76%. These findings demonstrate a cost-effective and environmentally sustainable approach for antibiotic removal under mild operating conditions.</p>

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Efficient degradation of achromycin by a CuO/Cu₂O-based photo-Fenton-like advanced oxidation process at near-neutral pH

  • 期刊论文

  • 发表日期：

    2026年6月22日

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  • Amira Ben Gouider Trabelsi,
  • Fatemah H. Alkallas,
  • Abdullah F. Al Naim,
  • Adil Alshoaibi,
  • Javed Mazher,
  • Shehab A. Mansour,
  • Maha A. Tony

摘要

The persistent presence of antibiotic residues in aquatic environments poses significant environmental and public health concerns, necessitating the development of efficient and sustainable treatment strategies. In this study, a hybrid CuO/Cu₂O nanostructured catalyst was synthesized via thermal decomposition and applied in a UV-assisted photo-Fenton-like system for the degradation of Achromycin. Structural characterization confirmed the formation of mixed-phase CuO/Cu₂O with a porous rosette-like morphology and an average crystallite size of 40 nm, providing abundant active sites. The CuO/Cu₂O–H₂O₂ –UV system achieved up to 94% degradation within 60 min at near-neutral pH (6.4), demonstrating a clear advantage over conventional Fenton processes that require acidic conditions. The enhanced performance is attributed to the synergistic CuO/Cu₂O heterojunction, which promotes efficient Cu(I)/Cu(II) redox cycling and sustained generation of hydroxyl radicals (•OH). UV irradiation primarily enhances H₂O₂ photolysis and accelerates redox regeneration rather than acting as a direct photocatalytic excitation source. Kinetic analysis followed pseudo-first-order behavior (R² = 0.92–0.99), while thermodynamic evaluation revealed an exothermic process with negative activation energy. RSM predicted an optimal removal efficiency of 96%, which was experimentally validated. The catalyst exhibited good stability, retaining appreciable activity after six reuse cycles reached 76%. These findings demonstrate a cost-effective and environmentally sustainable approach for antibiotic removal under mild operating conditions.