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<p>Zinc sulphide nanoparticles were hydrothermally synthesized and integrated into a chitosan N-acetyl cysteine copper complex (CNCC) to develop a novel hybrid photocatalyst. The ZnS-CNCC nanocomposite was characterized using XRD, UV–Vis, FTIR, SEM–EDX, TEM/HRTEM, and PL analyses, confirming the crystalline ZnS structure, nanoscale morphology, and strong interfacial interaction with the CNCC matrix. Optical studies revealed a bandgap of 3.88&#xa0;eV, while PL results indicated supressed charge carrier recombination in the hybrid system. The photocatalytic performance of the ZnS-CNCC nanocomposite was evaluated for the degradation of pharmaceutical pollutants (aspirin, paracetamol, and tetracycline) under UV (254 &amp; 365&#xa0;nm), visible, and solar irradiation across different pH conditions. The hybrid photocatalyst exhibited significantly enhanced degradation efficiency, with maximum activity under UV irradiation, demonstrating the effectiveness of the polymer-metal-semiconductor hybrid design in improving photocatalytic performance.</p>

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Synergistic UV-Driven Photocatalytic Degradation of Pharmaceutical Pollutants over ZnS-Chitosan-Cu Hybrid Nanocomposite

  • 期刊论文

  • 发表日期：

    2026年2月24日

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  • Ganji Sandhya,
  • Domala Suresh,
  • Arshanapelly Mahender Rao,
  • Rajendran Sribalan,
  • K. Ramesh

摘要

Zinc sulphide nanoparticles were hydrothermally synthesized and integrated into a chitosan N-acetyl cysteine copper complex (CNCC) to develop a novel hybrid photocatalyst. The ZnS-CNCC nanocomposite was characterized using XRD, UV–Vis, FTIR, SEM–EDX, TEM/HRTEM, and PL analyses, confirming the crystalline ZnS structure, nanoscale morphology, and strong interfacial interaction with the CNCC matrix. Optical studies revealed a bandgap of 3.88 eV, while PL results indicated supressed charge carrier recombination in the hybrid system. The photocatalytic performance of the ZnS-CNCC nanocomposite was evaluated for the degradation of pharmaceutical pollutants (aspirin, paracetamol, and tetracycline) under UV (254 & 365 nm), visible, and solar irradiation across different pH conditions. The hybrid photocatalyst exhibited significantly enhanced degradation efficiency, with maximum activity under UV irradiation, demonstrating the effectiveness of the polymer-metal-semiconductor hybrid design in improving photocatalytic performance.