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<p>Metal–organic frameworks (MOFs) have emerged as potent antimicrobial materials; however, their practical deployment is often limited by poor processability and instability in aqueous environments. Herein, we report the fabrication of a silver-based MOF (Ag-MOF) embedded within a polyethersulfone (PES) matrix, forming a self-supporting fibrous Ag-MOF@PES composite thin film with an approximate thickness of 0.4&#xa0;mm via phase inversion technique. This work demonstrates an integrated composite design, suggesting beneficial interfacial interactions that contribute to improve antibacterial durability and photocatalytic functionality. The X-ray diffraction (XRD), surface morphology, and FTIR spectra verified strong interfacial interactions between PES matrix and the Ag-MOF network of the as prepared Ag-MOF@PES composite thin film were studied systematically. The Ag-MOF@PES composite thin film exhibited pronounced dose-dependent antibacterial activity, achieving maximum zones of inhibition of 16.6 ± 0.7&#xa0;mm against <i>Escherichia coli</i> and 15.7 ± 0.6&#xa0;mm against <i>Staphylococcus aureus</i> showed higher antibacterial performance as compared with commercial silver nanoparticles, and silver salt alone, attributed to sustained Ag<sup>+</sup> release and reactive oxygen species (ROS) generation. In addition to antimicrobial performance, the composite thin film demonstrated efficient photocatalytic activity, achieving 86% degradation of methylene blue within 90&#xa0;min under natural sunlight (mid-July, ~ 11:45–13:15, Pakistan), following pseudo-first-order kinetics with a rate constant of 0.0150&#xa0;min<sup>−1</sup>. The combined antibacterial and photocatalytic performance, coupled with enhanced structural stability and flexibility, positions the Ag-MOF@PES composite thin film as a multifunctional platform for antimicrobial coatings and wastewater treatment applications.</p>

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A Fibrous Thin Film Based on Silver(I) Metal–Organic Framework/Polyethersulfone Composite with Excellent Antibacterial Properties and Photocatalytic Degradation of Methylene Blue

  • 期刊论文

  • 发表日期：

    2026年6月17日

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  • Humaira Shaheen,
  • Abdul Rauf,
  • Muhammad Arif,
  • Muhammad Akram,
  • Komal Aroosh,
  • Mehdi Hassan,
  • Muhammad Jahangir

摘要

Metal–organic frameworks (MOFs) have emerged as potent antimicrobial materials; however, their practical deployment is often limited by poor processability and instability in aqueous environments. Herein, we report the fabrication of a silver-based MOF (Ag-MOF) embedded within a polyethersulfone (PES) matrix, forming a self-supporting fibrous Ag-MOF@PES composite thin film with an approximate thickness of 0.4 mm via phase inversion technique. This work demonstrates an integrated composite design, suggesting beneficial interfacial interactions that contribute to improve antibacterial durability and photocatalytic functionality. The X-ray diffraction (XRD), surface morphology, and FTIR spectra verified strong interfacial interactions between PES matrix and the Ag-MOF network of the as prepared Ag-MOF@PES composite thin film were studied systematically. The Ag-MOF@PES composite thin film exhibited pronounced dose-dependent antibacterial activity, achieving maximum zones of inhibition of 16.6 ± 0.7 mm against Escherichia coli and 15.7 ± 0.6 mm against Staphylococcus aureus showed higher antibacterial performance as compared with commercial silver nanoparticles, and silver salt alone, attributed to sustained Ag+ release and reactive oxygen species (ROS) generation. In addition to antimicrobial performance, the composite thin film demonstrated efficient photocatalytic activity, achieving 86% degradation of methylene blue within 90 min under natural sunlight (mid-July, ~ 11:45–13:15, Pakistan), following pseudo-first-order kinetics with a rate constant of 0.0150 min−1. The combined antibacterial and photocatalytic performance, coupled with enhanced structural stability and flexibility, positions the Ag-MOF@PES composite thin film as a multifunctional platform for antimicrobial coatings and wastewater treatment applications.