吸附
纳米孔
解吸
材料科学
吸附剂
吸附
化学工程
水运
产量(工程)
碳纤维
雨水收集
环境科学
纳米技术
化学
环境工程
复合材料
水流
有机化学
生态学
复合数
工程类
生物
作者
Yan Song,Ning Xu,Guoliang Liu,Heshan Qi,Wei Zhao,Bin Zhu,Zhen Lin,Jia Zhu
标识
DOI:10.1038/s41565-022-01135-y
摘要
Solar-driven, sorption-based atmospheric water harvesting (AWH) offers a cost-effective solution to freshwater scarcity in arid areas. Creating AWH devices capable of performing multiple adsorption–desorption cycles per day is crucial for increasing water production rates matching human water requirements. However, achieving rapid-cycling AWH in passive harvesters has been challenging due to sorbents’ slow water adsorption–desorption dynamics. Here we report an MOF-derived nanoporous carbon, a sorbent endowed with fast sorption kinetics and excellent photothermal properties, for high-yield AWH. The optimized structure (40% adsorption sites and ~1.0 nm pore size) has superior sorption kinetics due to the minimized diffusion resistance. Moreover, the carbonaceous sorbent exhibits fast desorption kinetics enabled by efficient solar-thermal heating and high thermal conductivity. A rapid-cycling water harvester based on nanoporous carbon derived from metal–organic frameworks can produce 0.18 L kgcarbon−1 h−1 of water at 30% relative humidity under one-sun illumination. The proposed design strategy is helpful to develop high-yield, solar-driven AWH for advanced freshwater-generation systems.
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