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<p>Transition metal modified metal–organic frameworks (MOFs) exhibit enhanced antibacterial and photocatalytic degradation performance compared to pristine MOFs. In this study, Ag-loaded ZIF-67 demonstrated superior antibacterial activity and photocatalytic efficiency, attributed to the activation of hot electrons and reduced charge recombination. X-ray diffraction (XRD) confirmed the retention of monoclinic and triclinic phases in ZIF-67 and Ag/ZIF-67, respectively. Furthermore, Ag incorporation enhanced visible light absorption between 450–680&#xa0;nm range. The synergistic effects of localized surface plasmon resonance (LSPR) and efficient photogenerated charge carrier separation facilitated 87.8% cefotaxime degradation within 75&#xa0;min. According to the trapping experiment, superoxide radicals (O<sub>2</sub><sup>−</sup>•) and photogenerated electrons (e<sup>−</sup>) are the dominant reactive species. Moreover, Ag/ZIF-67 demonstrated increased antibacterial activity against Gram-positive <i>Streptococcus pyogenes</i> and Gram-negative <i>Klebsiella pneumoniae</i>, explained by the cooperative interaction between Ag⁺ and Co<sup>2+</sup> ions. Overall, this work highlights the Ag-doped ZIF-67 as a promising photocatalyst with significant potential for biological and environmental applications.</p> Graphical Abstract <p></p>

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Nanoscale Plasmonic Ag/ZIF-67 Interface for High-Efficiency Cefotaxime Removal and Microbial Inactivation

  • 期刊论文

  • 发表日期：

    2026年3月10日

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  • Monalisa Samal,
  • Asima Subhadarshini,
  • Dharitri Rath,
  • Binita Nanda

摘要

Transition metal modified metal–organic frameworks (MOFs) exhibit enhanced antibacterial and photocatalytic degradation performance compared to pristine MOFs. In this study, Ag-loaded ZIF-67 demonstrated superior antibacterial activity and photocatalytic efficiency, attributed to the activation of hot electrons and reduced charge recombination. X-ray diffraction (XRD) confirmed the retention of monoclinic and triclinic phases in ZIF-67 and Ag/ZIF-67, respectively. Furthermore, Ag incorporation enhanced visible light absorption between 450–680 nm range. The synergistic effects of localized surface plasmon resonance (LSPR) and efficient photogenerated charge carrier separation facilitated 87.8% cefotaxime degradation within 75 min. According to the trapping experiment, superoxide radicals (O2−•) and photogenerated electrons (e−) are the dominant reactive species. Moreover, Ag/ZIF-67 demonstrated increased antibacterial activity against Gram-positive Streptococcus pyogenes and Gram-negative Klebsiella pneumoniae, explained by the cooperative interaction between Ag⁺ and Co2+ ions. Overall, this work highlights the Ag-doped ZIF-67 as a promising photocatalyst with significant potential for biological and environmental applications.

Graphical Abstract