Continuous atmospheric water production coupled with humidity regulation enabled by a MOF-based humidity pump

Sorption-based atmospheric water harvesting (SAWH) is a promising way to address global water shortage. However, there still lacks further study to demonstrate the potential of simultaneous water production and humidity regulation broadening its applications. Here, a metal–organic framework-based humidity pump was proposed to realize both the two functions in a wide humidity range. Double sorption bed with Ni2Cl2(BTDD) coating was integrated to switch alternately between adsorption (dehumidification) and desorption (water production) states throughout the day. The device produced 2510 mLwater·kg-1MOF·day-1 indoors superior to the existing researches. Even at arid condition (35% RH), it still exhibited high yield of 1780 mLwater·kg-1MOF·day-1 benefiting from enhanced heat and mass transfer. Besides, the device effectively dehumidified a space with 20.5-time volume below 60% RH under variable high-humidity environments (75%-90% RH). This device is a feasible way to water scarcity and a functional product for multi-scenario utilization, promoting SAWH a further step to practical applications.