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Smart spongy device captures water from thin air

  • Engineers from Australia and China created a porous material that uses sunlight to extract moisture from the atmosphere, as detailed in a February 2025 publication.
  • The device uses refined balsa wood cubes treated with lithium chloride and iron oxide nanoparticles to absorb moisture at low humidity and release water when heated by the sun.
  • Testing showed the device captures 2.5 milliliters per gram overnight and releases most water during daytime, maintaining efficiency from 30% to 90% humidity and temperatures from 5°C to-20°C.
  • Dr. Junfeng Hou reported that the device was able to collect 94% of its potential water output each day, underscoring its promise for providing clean water in remote, dry, or disaster-affected locations.
  • The device’s simple, low-cost materials and scalable production suggest it could provide sustainable drinking water solutions in emergencies and water-scarce regions.
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TechXplore broke the news in on Wednesday, May 7, 2025.
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