Synthesis and Atmospheric Water Harvesting Performance of Solar-Driven Multifunctional Polymer Materials Based on Metal–Organic Frameworks

Adsorbent-based atmospheric water collection technology has great potential in the field of alleviating the shortage of freshwater resources. Here, we prepared the MOF-based hygroscopic polymer material (MPAA) with atmospheric water harvesting and liquid water storage by using MOF-801 with a double copolymerization bond and a three-dimensional structure as a functional monomer and copolymerized with acrylic acid (AA). The atmospheric water-holding properties of the materials at different humidity gradients (50%–90% RH) and their desorption properties under simulated daylight conditions were evaluated. The adsorption of water vapor by MPAA was 628.8 mg/g at the test time of 8 h, which was significantly higher than that of PAA. The field experiment indicated the material's potential to reduce evaporation of soil water, which could potentially be used to store liquid water. This strategy provides new insights into the design of functional materials for atmospheric water harvesting in arid areas and ecological restoration.