How can MOFs be used to harvest water in deserts?

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Metal-Organic Frameworks Offer a Method for Desert Water Harvesting

Metal-organic frameworks (MOFs) can be utilised to harvest water vapour from arid environments, as demonstrated by research involving materials capable of collecting moisture from desert air. This collected water can then be rendered drinkable once the material is heated by the sun. This innovative application highlights the potential of MOFs in addressing water scarcity in dry regions.
MOFs as Highly Porous Materials

MOFs are described as solids characterised by an extremely porous structure, containing numerous tiny holes. These internal cavities can be vast, with a few grams of a specific MOF reportedly possessing an internal surface area comparable to a football pitch. This extensive porosity allows MOFs to absorb and store significantly more molecules, such as water or other gases, than conventional materials.
Demonstration of Desert Water Collection

Omar Yaghi, one of the Nobel laureates recognised for his work in this field, showcased a MOF material specifically designed for water harvesting. This material was successfully employed to collect water vapour directly from the desert air in Arizona. The process involves the MOF absorbing moisture overnight.
Retrieval of Drinkable Water

Following the absorption of water vapour from the desert atmosphere, the collected water is made accessible through a simple heating process. When the MOF material containing the absorbed moisture is exposed to the heat of the rising sun, it releases the water. This released water has been confirmed as drinkable, indicating a viable method for obtaining potable water in desert conditions.

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How can MOFs be used to harvest water in deserts?

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