Materials Science

Framework materials can dew it

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Science  07 Jul 2017:
Vol. 357, Issue 6346, pp. 44-45
DOI: 10.1126/science.357.6346.44-g

Although filtration or distillation can desalinate water, these approaches can require large amounts of energy, great quantities of saline water, and extensive piping and distribution networks. They are thus impractical in a desert setting where extraction from the atmosphere is the primary source of water. Rieth et al. constructed a metal-organic framework (MOF) material that can pull 0.8 grams of water per gram of MOF from air at only 30% humidity, using the day-to-night temperature swing to drive adsorption and desorption. The key to the design was having pores wider than the critical diameter for capillary action to allow free flow of the water molecules.

ACS Cent. Sci. 10.1021/acscentsci.7b00186 (2017).

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