Protocol for atmospheric water harvesting using in situ polymerization honeycomb hygroscopic polymers

Atmospheric water harvesting (AWH) offers a solution for efficiently extracting water from the air. In this protocol, we detail the steps to develop a composite sorbent loaded with hygroscopic salts and lithium chloride (LiCl) and based on hydrogel, acrylamide monomer (AM), and carbon nanotubes (CNTs). We describe a streamlined experimental approach for the synthesis of the honeycomb-optimized hydrogel-based composite adsorbent (PCLG) by in situ polymerization. The produced sorbent exhibits ultra-high adsorption/desorption capacity per unit volume and low-temperature desorption. For complete details on the use and execution of this protocol, please refer to Wang et al. (2022).