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首页> 外文期刊>Advanced functional materials >High-Performance Freshwater Harvesting System by Coupling Solar Desalination and Fog Collection with Hierarchical Porous Microneedle Arrays
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High-Performance Freshwater Harvesting System by Coupling Solar Desalination and Fog Collection with Hierarchical Porous Microneedle Arrays

机译：High-Performance Freshwater Harvesting System by Coupling Solar Desalination and Fog Collection with Hierarchical Porous Microneedle Arrays

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摘要

The maximizing daily freshwater yield on the ocean surface necessitates alldaywater harvesting technologies and materials. This is realizable by takingadvantage of the natural sunlight and humid air, which can drive daytimesolar desalination and nighttime fog collection, respectively. To this end, twotypes of hierarchically porous microneedle array structures, which demonstratesuperior capabilities for efficient fog capturing and photothermalevaporation, respectively, are prepared. The gel-forged microneedle arrayswith Janus wettability are fabricated via a simple and controllable top-downmicro-molding process on a porous platform, and porosity within microneedlesis further achieved readily by additional freeze-drying treatment. Thedeveloped microneedle structure shows an ultrahigh fog harvesting rate up to30.5 kg m~(?2) h~(?1), enabling high flux water droplet harvesting from moistureduring nighttime. In the daytime, a solar evaporation rate of 2.46 kg m~(?2) h~(?1)is realized due to the increased evaporative area of the porous microneedlearrays and enhanced photothermal conversion. By uniting these two waterharvestingroutes, a daily cycle can ideally deliver an overall water yield closeto 200 kg m~(?2), which will offer a promising solution for sustaining future lowcostand decentralized clean water production.

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