Recent Progress of Atmospheric Water Harvesting Using Metal-Organic Frameworks

Abstract

Atmospheric water harvesting based on vapor adsorption is a newly emerged and potential technology to supply portable water for arid areas. To efficiently harvest vapor from the air, sorbents are required to have considerable adsorption capacity, easy regeneration and high stability. With the advantages of porous structure, tunable pore size and tailorable hydrophilicity, metal-organic frameworks (MOFs) have demonstrated excellent performance in vapor adsorption and water generation. In this review, we first discuss the degradation mechanisms of MOFs exposed to water and summarize the structure-stability relationship; by centering on the adsorption isotherms, the connection between the structure of MOFs and the water adsorption property is illuminated; finally, some prospects are suggested in order to push forward the progress of this technology.