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Efficient Solar-Driven Water Harvesting from Arid Air with Metal-Organic Frameworks Modified by Hygroscopic Salt.
Angewandte Chemie International Edition ( IF 16.1 ) Pub Date : 2020-01-13 , DOI: 10.1002/anie.201915170 Jiaxing Xu 1 , Tingxian Li 1 , Jingwei Chao 1 , Si Wu 1 , Taisen Yan 1 , Wenchen Li 1 , Biye Cao 1 , Ruzhu Wang 1
Angewandte Chemie International Edition ( IF 16.1 ) Pub Date : 2020-01-13 , DOI: 10.1002/anie.201915170 Jiaxing Xu 1 , Tingxian Li 1 , Jingwei Chao 1 , Si Wu 1 , Taisen Yan 1 , Wenchen Li 1 , Biye Cao 1 , Ruzhu Wang 1
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Freshwater scarcity is a global challenge threatening human survival, especially for people living in arid regions. Sorption-based atmospheric water harvesting (AWH) is an appealing way to solve this problem. However, the state-of-the-art AWH technologies have poor water harvesting performance in arid climates owing to the low water sorption capacity of common sorbents under low humidity conditions. We report a high-performance composite sorbent for efficient water harvesting from arid air by confining hygroscopic salt in a metal-organic framework matrix (LiCl@MIL-101(Cr)). The composite sorbent shows 0.77 g g-1 water sorption capacity at 1.2 kPa vapor pressure (30 % relative humidity at 30 °C) by integrating the multi-step sorption processes of salt chemisorption, deliquescence, and solution absorption. A highly efficient AWH prototype is demonstrated with LiCl@MIL-101(Cr) that can enable the harvesting of 0.45-0.7 kg water per kilogram of material under laboratory and outdoor ambient conditions powered by natural sunlight without optical concentration and additional energy input.
中文翻译：
利用吸湿盐改性的金属有机框架，从干旱的空气中高效地收集太阳能。
淡水短缺是威胁人类生存的全球挑战，特别是对生活在干旱地区的人们而言。基于吸附的大气水收集（AWH）是解决此问题的一种有吸引力的方法。但是，由于在低湿度条件下普通吸附剂的吸水能力低，因此最先进的AWH技术在干旱气候下的集水性能很差。我们报告了一种高性能复合吸附剂，可通过将吸湿盐限制在金属有机骨架基质（LiCl @ MIL-101（Cr））中来从干旱空气中有效收集水。通过整合盐化学吸附，潮解和溶液吸收的多步吸附过程，该复合吸附剂在1.2 kPa蒸气压（30％相对湿度为30％）下显示出0.77 g g-1的水吸附能力。
更新日期：2020-02-14
中文翻译：
利用吸湿盐改性的金属有机框架，从干旱的空气中高效地收集太阳能。
淡水短缺是威胁人类生存的全球挑战，特别是对生活在干旱地区的人们而言。基于吸附的大气水收集（AWH）是解决此问题的一种有吸引力的方法。但是，由于在低湿度条件下普通吸附剂的吸水能力低，因此最先进的AWH技术在干旱气候下的集水性能很差。我们报告了一种高性能复合吸附剂，可通过将吸湿盐限制在金属有机骨架基质（LiCl @ MIL-101（Cr））中来从干旱空气中有效收集水。通过整合盐化学吸附，潮解和溶液吸收的多步吸附过程，该复合吸附剂在1.2 kPa蒸气压（30％相对湿度为30％）下显示出0.77 g g-1的水吸附能力。
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