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<p>Emerging pharmaceutical and dye pollutants in wastewater pose significant environmental risks, necessitating efficient, sustainable photocatalysts. This study introduces a microwave-assisted green synthesis of Al<sub>2</sub>O<sub>3</sub>-Mn<sub>2</sub>O<sub>3</sub> nanocomposite using <i>Cucumis melo</i> peel extract for sunlight-driven degradation of malachite green (MG), Eriochrome Black T (EBT), ibuprofen (IBP), and ciprofloxacin (CIP). Characterization via UV–Vis spectroscopy revealed a peak at ~ 302&#xa0;nm; DLS showed uniform particles (95&#xa0;nm average, PDI 0.25, zeta potential − 26.66 mV) indicating stability; FTIR confirmed Al–O and Mn–O bonds; and SEM displayed ~ 92&#xa0;nm rounded-irregular particles with loose agglomeration. Under natural sunlight, the nanocomposite achieved 100% MG removal, 95% IBP degradation, 99.3% EBT degradation, and 94.3% CIP degradation, following pseudo-first-order kinetics. These findings highlight the nanocomposite as a highly efficient, eco-friendly photocatalyst for simultaneous dye and pharmaceutical pollutant remediation.</p>

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Photocatalytic Removal of Dyes and Pharmaceutical Drugs using Al2O3-Mn2O3 Nanocomposite Derived from Cucumis melo Peel Extract

  • 期刊论文

  • 发表日期：

    2026年5月11日

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  • Mahvish Shameem,
  • Waseem Ahmad,
  • Sarfaraz Ahmed,
  • Irfan Aamer Ansari,
  • Sanjay Kumar,
  • Perwez Alam

摘要

Emerging pharmaceutical and dye pollutants in wastewater pose significant environmental risks, necessitating efficient, sustainable photocatalysts. This study introduces a microwave-assisted green synthesis of Al2O3-Mn2O3 nanocomposite using Cucumis melo peel extract for sunlight-driven degradation of malachite green (MG), Eriochrome Black T (EBT), ibuprofen (IBP), and ciprofloxacin (CIP). Characterization via UV–Vis spectroscopy revealed a peak at ~ 302 nm; DLS showed uniform particles (95 nm average, PDI 0.25, zeta potential − 26.66 mV) indicating stability; FTIR confirmed Al–O and Mn–O bonds; and SEM displayed ~ 92 nm rounded-irregular particles with loose agglomeration. Under natural sunlight, the nanocomposite achieved 100% MG removal, 95% IBP degradation, 99.3% EBT degradation, and 94.3% CIP degradation, following pseudo-first-order kinetics. These findings highlight the nanocomposite as a highly efficient, eco-friendly photocatalyst for simultaneous dye and pharmaceutical pollutant remediation.