Porous materials MOFs and COFs: Energy-saving adsorbents for atmospheric water harvesting

Abstract

Atmospheric water harvesting (AWH) that extact water from air is adorable technology which can release water stress in arid regions decentralized, however right now the high energy consumption hinders its development especially in low humidity condition. Improving humidity by adsorbing water through porous materials is an effective way to reduce AWH energy consumption. Metal organic frameworks (MOFs) and covalent organic frameworks (COFs), as a representative of new designable porous materials, is expected to solve the energy consumption problem in the practical application process of AWH. This review elucidates the energy-saving effects and design objectives of MOFs and COFs by analyzing the impact of adsorbents on energy consumption. Additionally, the manuscript delves into the principles of water adsorption in MOFs and COFs, subsequently reviewing the design methods for materials optimized for AWH performance. Lastly, the manuscript outlines the primary challenges and development recommendations for future energy-saving AWH solutions in arid regions.