Water harvesting from air with metal-organic frameworks powered by natural sunlight
Water harvesting from air with metal-organic frameworks powered by natural sunlight
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DOI：
10.1126/science.aam8743
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发表时间：
2017-04-28
期刊：
影响因子：
56.9
通讯作者：
Wang, Evelyn N.
中科院分区：
文献类型：
--
作者：
Kim, Hyunho;Yang, Sungwoo;Wang, Evelyn N.
大气水是一种资源，相当于地球上湖泊中所有淡水的10%。然而，还没有开发出从空气中捕获和输送水的有效方法，特别是在低湿度水平（低至20%）下。我们报告了基于多孔金属有机框架{MOF-801，[Zr6O4（OH）（4）（富马酸盐）（6）]}的装置的设计和演示，该装置通过使用来自自然阳光的低品位热量在小于1个太阳（1千瓦/平方米）的通量下在环境条件下从大气中捕获水。该装置能够在低至20%的相对湿度水平下每天每千克MOF收获2.8升水，并且不需要额外的能量输入。
Atmospheric water is a resource equivalent to similar to 10% of all fresh water in lakes on Earth. However, an efficient process for capturing and delivering water from air, especially at low humidity levels (down to 20%), has not been developed. We report the design and demonstration of a device based on a porous metal-organic framework {MOF-801, [Zr6O4(OH)(4)(fumarate)(6)]} that captures water from the atmosphere at ambient conditions by using low-grade heat from natural sunlight at a flux of less than 1 sun (1 kilowatt per square meter). This device is capable of harvesting 2.8 liters of water per kilogram of MOF daily at relative humidity levels as low as 20% and requires no additional input of energy.