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  • Gradient-Janus Wires for Simultaneous Fogwater Harvesting and Electricity Generation
  • 来源:郑咏梅教授个人网站 2024-08-13
  • ACS Nano 2024, 18, 10279?10287,https://doi.org/10.1021/acsnano.4c01386 

    Abstract:

    Gradient-Janus wire (GJW) with a diameter of 0.3 mm has been fabricated

    on a large scale through liquid confined modification, enabling the opposite conical wetting

    phenomenon along the same orientation of the GJW, characterized by an increasing

    superhydrophilic region and a decreasing hydrophobic region. This property allows the GJW

    to exhibit controllable water hovering, transport, and pinning during fog harvesting, i.e., at a

    large tilting angle α of 60° (mass increased with decreased α), the GJW can hover 0.6 mg of

    harvested fogwater in 30 s, can transport 3 mg of fogwater along the gradient in 30 s at α =

    4° (with maximal mass reaching up to 4.3 mg at α = ?10°), and finally, pin the water droplet

    at the end of the GJW. Such ability generates an effective torque that serves as the driving

    force for rotation. We designed a GJWs-wheel by radially arranging 60 GJWs together,

    resulting in an extremely lightweight structure weighing only 1.9 g. The cumulative torque

    generated during fog harvesting activates the rotation of the GJWs-wheel. When loaded with

    a coil within a magnetic field, electricity is generated as output power peaks at around 0.25

    μW while maintaining a high water harvesting efficiency averaging approximately 38 ± 2.12 mg/min. This finding is significant

    as it provides valuable insights into designing materials capable of efficiently harnessing both energy and water resources.

  • [来源:中国聚合物网]
  • 了解更多请进入: 郑咏梅教授个人网站
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