Metal-organic frameworks for solar-driven atmosphere water harvesting

Efficient freshwater production techniques are urgently required to address the global water scarcity problem. this regard, solar-driven atmospheric water harvesting (AWH) technology, which can capture water vapor from ambient air and release it under sunlight, is a sustainable and feasible strategy to obtain freshwater. Metal organic frameworks (MOFs) have emerged as promising adsorbents for achieving solar-driven AWH, even arid regions with relative humidity as low as 10%. During the water desorption process, excellent light ab-sorption and photothermal conversion abilities are much important for fast kinetics and multiple cycles. How-ever, the related photothermal performance of MOFs-based adsorbents has been rarely concerned. Herein, the latest development of MOFs-based adsorbents for efficient solar-driven AWH are reviewed, and corresponding design and modification strategies to improve its water adsorption and photothermal properties are proposed. Besides, water harvesters with different configurations are briefly introduced. Furthermore, an outlook about the key trends of solar-driven AWH is outlined.

Automated summary

Efficient freshwater production techniques are urgently needed to tackle global water scarcity. Solar-driven atmospheric water harvesting (AWH) technology, utilizing metal organic frameworks (MOFs) as promising absorbents, can capture water vapor from air and release it under sunlight, making it a sustainable and feasible strategy. This review focuses on the latest advancements in MOFs-based absorbents for efficient solar-driven AWH, highlighting strategies to improve their water adsorption and photothermal properties. Different configurations of water harvesters are introduced, and future trends in solar-driven AWH are outlined.