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<p>In order to address ecological and significant health concerns, this study investigates a unique water treatment solution using photocatalysis and antibacterial applications. A ZIF-8 based nanocomposite is synthesized via solvothermal formation by incorporating Bi<sub>2</sub>S<sub>3</sub> into ZIF-8, followed by photodegradation of antibiotic doxycycline hydrochloride (DOX) and bactericidal approach against Gram-stained bacteria <i>C. indologenes</i> and <i>S. aureus</i>. The structure and properties of the composite are confirmed using all the characterization methods including P-XRD, FTIR, UV-DRS, SEM, BET, XPS, AC conductivity, dielectric constant and impedance study. The photodegradation efficiency is evaluated under varying parameters such as time, pH of the solution, catalyst dose and DOX concentration, with an impressive 81.43% degradation observed under visible light irradiation at pH 7 and a TOC of 64% in 90&#xa0;min. This process follows Z-scheme mechanistic pathway and remains stable over four consecutive cycles. In addition, the composite demonstrates strong antibacterial activity against the bacteria. These findings suggest that the incorporation of Bi<sub>2</sub>S<sub>3</sub> to ZIF-8 creates a synergistic effect, forming a robust heterogenous catalyst that is effective for both water purification and antibacterial applications.</p> Graphical Abstract <p></p>

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Visible light active Bi2S3/ZIF-8 MOF composite for concurrent doxycycline degradation and antibacterial action

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2026年2月17日

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  • Asima Subhadarshini,
  • Swayam Aryam Behera,
  • Nahid Parwin,
  • Enketeswara Subudhi,
  • P. Ganga Raju Achary,
  • Binita Nanda

摘要

In order to address ecological and significant health concerns, this study investigates a unique water treatment solution using photocatalysis and antibacterial applications. A ZIF-8 based nanocomposite is synthesized via solvothermal formation by incorporating Bi2S3 into ZIF-8, followed by photodegradation of antibiotic doxycycline hydrochloride (DOX) and bactericidal approach against Gram-stained bacteria C. indologenes and S. aureus. The structure and properties of the composite are confirmed using all the characterization methods including P-XRD, FTIR, UV-DRS, SEM, BET, XPS, AC conductivity, dielectric constant and impedance study. The photodegradation efficiency is evaluated under varying parameters such as time, pH of the solution, catalyst dose and DOX concentration, with an impressive 81.43% degradation observed under visible light irradiation at pH 7 and a TOC of 64% in 90 min. This process follows Z-scheme mechanistic pathway and remains stable over four consecutive cycles. In addition, the composite demonstrates strong antibacterial activity against the bacteria. These findings suggest that the incorporation of Bi2S3 to ZIF-8 creates a synergistic effect, forming a robust heterogenous catalyst that is effective for both water purification and antibacterial applications.

Graphical Abstract