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<p>Mechanical-energy-driven portable water disinfection has attracted attention for its electricity-free operation, but this approach generally faces bottlenecks such as a high mechanical activation threshold, energy dispersion and low interfacial reaction efficiency, making it difficult to achieve rapid and stable pathogen inactivation in practical scenarios. Here we report a manually operated portable water disinfection system that can inactivate 99.9999% of <i>Vibrio cholerae</i> within 1 min and demonstrate broad-spectrum disinfection against bacteria, fungi, parasites and viruses. Amino-modified SiO<sub>2</sub> nanoparticles loaded with Au nanoparticles capture hydrated electrons and transfer them to the electret surface to generate localized nanoscale electric fields, which are further strengthened by hydrophobic fluorinated groups. This interfacial architecture not only promotes charge accumulation and transfer, but also leverages the intensified electric field to actively drive reactive oxygen species generation at the solid–liquid–air interface, thereby markedly enhancing the disinfection rate and efficacy compared with existing contact-electrification-based disinfection technologies. Owing to its ease of operation, our interfacial electric-field-enhanced disinfection system is readily deployable in disaster relief and resource-constrained regions.</p>

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Hand-powered interfacial electric-field-enhanced water disinfection system

  • 期刊论文

  • 发表日期：

    2025年10月15日

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  • Zhidi Chen,
  • Yajing Zhang,
  • Panjing Lv,
  • Tongwei Wu,
  • Jianing He,
  • Jinyan Du,
  • Qiangqiang Sun,
  • Qianbao Wu,
  • Jinlong Yang,
  • Yiming Zhang,
  • Yanning Zhang,
  • Fei He,
  • Chunhua Cui,
  • Gonghua Hong,
  • Hongyu Zhu,
  • Yan Li,
  • Junling Guo,
  • Xu Deng

摘要

Mechanical-energy-driven portable water disinfection has attracted attention for its electricity-free operation, but this approach generally faces bottlenecks such as a high mechanical activation threshold, energy dispersion and low interfacial reaction efficiency, making it difficult to achieve rapid and stable pathogen inactivation in practical scenarios. Here we report a manually operated portable water disinfection system that can inactivate 99.9999% of Vibrio cholerae within 1 min and demonstrate broad-spectrum disinfection against bacteria, fungi, parasites and viruses. Amino-modified SiO2 nanoparticles loaded with Au nanoparticles capture hydrated electrons and transfer them to the electret surface to generate localized nanoscale electric fields, which are further strengthened by hydrophobic fluorinated groups. This interfacial architecture not only promotes charge accumulation and transfer, but also leverages the intensified electric field to actively drive reactive oxygen species generation at the solid–liquid–air interface, thereby markedly enhancing the disinfection rate and efficacy compared with existing contact-electrification-based disinfection technologies. Owing to its ease of operation, our interfacial electric-field-enhanced disinfection system is readily deployable in disaster relief and resource-constrained regions.