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<p>Atmospheric water harvesting (AWH) offers a sustainable route to freshwater production, but ensuring biological safety remains a major challenge due to the potential transport of bacteria during water evaporation. Here we report a scalable mussel-inspired hygroscopic aerogel integrating rapid sorption–desorption, structural stability and photothermal antibacterial activity. The aerogel achieves a higher water uptake of 6.0 g g<sup>−1</sup> with an absorption rate of 1.78 g g<sup>−1</sup> h<sup>−1</sup> at 95% relative humidity, while solar irradiation inactivates more than 90% of bacteria. The collected water is non-cytotoxic and supports in vitro cell growth. Moreover, we developed a solar–wind–electric hybrid AWH device incorporating this aerogel, and feeding the collected water to Sprague Dawley rats caused no tissue damage in vivo, confirming its biological safety. This platform combines efficient water harvesting with pathogen inactivation and biological safety, providing a scalable and versatile approach for safe AWH with potential applications in potable water supply, disaster relief and healthcare in resource-limited settings.</p>

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Pathogen-free atmospheric water harvesting using a mussel-inspired wet-adhesive photothermal aerogel

  • 期刊论文

  • 发表日期：

    2026年3月6日

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  • Feng Cheng,
  • Hongbin Li,
  • Zechang Wei,
  • Mengjuan Zhou,
  • Haojie Lu,
  • Qiujian Le,
  • Fei Wang,
  • Yujie Du,
  • Lin Yang,
  • Swee Ching Tan

摘要

Atmospheric water harvesting (AWH) offers a sustainable route to freshwater production, but ensuring biological safety remains a major challenge due to the potential transport of bacteria during water evaporation. Here we report a scalable mussel-inspired hygroscopic aerogel integrating rapid sorption–desorption, structural stability and photothermal antibacterial activity. The aerogel achieves a higher water uptake of 6.0 g g−1 with an absorption rate of 1.78 g g−1 h−1 at 95% relative humidity, while solar irradiation inactivates more than 90% of bacteria. The collected water is non-cytotoxic and supports in vitro cell growth. Moreover, we developed a solar–wind–electric hybrid AWH device incorporating this aerogel, and feeding the collected water to Sprague Dawley rats caused no tissue damage in vivo, confirming its biological safety. This platform combines efficient water harvesting with pathogen inactivation and biological safety, providing a scalable and versatile approach for safe AWH with potential applications in potable water supply, disaster relief and healthcare in resource-limited settings.