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.

Ultrahigh solar-driven atmospheric water production enabled by scalable rapid-cycling water harvester with vertically aligned nanocomposite sorbent

“…8 The working performance of SAWH system is strongly dependent on the water sorption capacity of sorbents; however, traditional porous sorbents (e.g., silica gels and zeolites) provide low water productivity because of their poor water sorption performance at low RH. 9 Therefore, many novel sorbents such as metal-organic frameworks (MOFs), [10][11][12][13][14] hydrogels, [15][16][17] liquid solutions, 18,19 and composite sorbents 20,21 with extraordinary performance were designed and exploited by the efforts from materials scientists in past years. Lately, these novel sorbents with high water sorption performance and special thermal/electrical effects also inspired energy-related applications such as energy storage, 22,23 thermal management, [24][25][26][27] electricity/fuel generations, 28,29 or co-application.…”

Progress and Perspectives of Hollow Multishelled Structures

“…Besides, coating the shells of HoMS with other materials has also been proved to effectively enhance its application performance. MOF as a promising porous matrix [ 55‐57 ] has a good affinity to various substrates and has been widely adopted to coat on HoMS. Wang's group reports the synthesis of various metal oxide@MIL‐100(Fe) HoMS, including SnO 2 , Co 3 O 4 , TiO 2 , NiO, etc .…”

Machine Learning-Assisted Computational Screening of Metal-Organic Frameworks for Atmospheric Water Harvesting

“…Due to its characteristics of high porosity, large specific surface area and adjustable structure, it is regarded as a candidate for traditional adsorption. Although MOFs have long been used in the fields of gas adsorption [ 8 ], separation [ 9 , 10 ], storage [ 11 , 12 ], catalysis [ 13 ], and heat pumps [ 14 , 15 ], the use of MOFs to harvest water vapor from the atmosphere has only been proposed in recent years [ 1 , 16 , 17 ]. This is because structural stability of MOFs may deteriorate after absorbing water.…”