articleAdvanced MaterialsMay 18, 2023Closed access

All‐Day Multicyclic Atmospheric Water Harvesting Enabled by Polyelectrolyte Hydrogel with Hybrid Desorption Mode

National University of Singapore · Shanghai Jiao Tong University · +1 more institution

PubMed
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Abstract

Abstract Sorption‐based atmospheric water harvesting (AWH) is a promising approach for mitigating worldwide water scarcity. However, reliable water supply driven by sustainable energy regardless of diurnal variation and weather remains a long‐standing challenge. To address this issue, a polyelectrolyte hydrogel sorbent with an optimal hybrid‐desorption multicyclic‐operation strategy is proposed, achieving all‐day AWH and a significant increase in daily water production. The polyelectrolyte hydrogel possesses a large interior osmotic pressure of 659 atm, which refreshes sorption sites by continuously migrating the sorbed water within its interior, and thus enhancing sorption kinetics. The charged polymeric…

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