Hierarchical Silica Composites for Enhanced Water Adsorption at Low Humidity.

ABSTRACT: To combat water scarcity in remote areas around the world, adsorption-based atmospheric water harvesting (AWH) has been proposed as a technology that can be used alongside existing water production capabilities. However, commonly used adsorbents either have low water adsorption loadings or are difficult to regenerate. In this work, we developed two novel hierarchical silica-salt composites that both exhibit high water adsorption loadings under dry and humid conditions. The total water vapor loading, kinetics, and heats of water adsorption for both silica-salt composites were investigated. As hierarchical silicas have tunable pores and large pore volumes, these materials serve as effective host matrixes for the hygroscopic salt LiCl. Our results suggest that hierarchical pores play a signif

SUBMITTER: Chen C 

PROVIDER: S-EPMC11299149 | biostudies-literature | 2024 Jul

REPOSITORIES: biostudies-literature