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<p>The photocatalytic degradation of organic pollutants has been demonstrated to be both cost-effective and efficient. However, catalysts are prone to loss and migration during use, and recycling them still presents a series of complex and urgent problems. In this work, silver nanoparticles/polyvinylidene fluoride (AgNPs/PVDF) hybrid photocatalytic membrane was prepared <i>in-situ</i> by introducing AgNO₃ into a PVDF casting solution, employing the immersion phase inversion method, and applying UV post-treatment. The membrane exhibits high efficiency in photocatalytically degrading organic compounds, including dyes and antibiotics. Degradation of methylene blue (MB) was found to reach 99.9% within 5&#xa0;h, and the membrane exhibited excellent cyclic stability over 4 cycles. Photocatalytic degradation of MB was mainly found to be induced by superoxide radicals (·O<sub>2</sub><sup>–</sup>), and the photocatalytic degradation mechanism was explored. The AgNPs/PVDF photocatalytic membrane also demonstrated high antibacterial efficacy against <i>E. coli</i>, impeding bacterial proliferation during application. The highly convenient preparation of photocatalytic membrane offers a new option for efficiently treating wastewater contaminated with organic pollutants.</p> Graphical Abstract <p></p>

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In-situ preparation of uniform AgNPs/PVDF membrane with excellent photocatalytic and antibacterial properties

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2026年2月19日

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  • Xiaobing Liu,
  • Shi Su,
  • Faxiang Feng,
  • Guilin Dong,
  • Chuxuan Shi,
  • Zanming Zhu,
  • Runlin Han

摘要

The photocatalytic degradation of organic pollutants has been demonstrated to be both cost-effective and efficient. However, catalysts are prone to loss and migration during use, and recycling them still presents a series of complex and urgent problems. In this work, silver nanoparticles/polyvinylidene fluoride (AgNPs/PVDF) hybrid photocatalytic membrane was prepared in-situ by introducing AgNO₃ into a PVDF casting solution, employing the immersion phase inversion method, and applying UV post-treatment. The membrane exhibits high efficiency in photocatalytically degrading organic compounds, including dyes and antibiotics. Degradation of methylene blue (MB) was found to reach 99.9% within 5 h, and the membrane exhibited excellent cyclic stability over 4 cycles. Photocatalytic degradation of MB was mainly found to be induced by superoxide radicals (·O2–), and the photocatalytic degradation mechanism was explored. The AgNPs/PVDF photocatalytic membrane also demonstrated high antibacterial efficacy against E. coli, impeding bacterial proliferation during application. The highly convenient preparation of photocatalytic membrane offers a new option for efficiently treating wastewater contaminated with organic pollutants.

Graphical Abstract