Covalent Organic Frameworks for Extracting Water from Air

Water scarcity is becoming an increasingly pressing issue due to global population growth and industrialization. One effective approach to addressing this issue is sorption-based atmospheric water harvesting (SAWH). Covalent organic frameworks (COFs) are a type of porous crystalline material that have emerged as promising sorbents for water harvesting due to their high surface area, tunable pore size, and customizable pore chemistry. In this mini-review, we provide an overview of the different types of COFs, their structural characteristics, and the diverse linkage chemistries used to construct them. Then, we summarize recent advances in using COF-based sorbents for atmospheric water harvesting, including strategies for controlling sorption properties and optimizing performance in terms of thermodynamics and dynamics. Finally, we discuss prospects and challenges associated with improving the efficiency of COF-based SAWH systems.

Automated summary

Water scarcity is a growing concern due to population growth and industrialization worldwide. Sorption-based atmospheric water harvesting (SAWH) using covalent organic frameworks (COFs) as sorbents shows promise in addressing this issue. This mini-review provides an overview of different types of COFs, their structural characteristics, and the diverse chemistries used in their construction. Recent advances in COF-based sorbents for atmospheric water harvesting are summarized, including strategies for controlling sorption properties and optimizing thermodynamics and dynamics. Prospects and challenges for improving the efficiency of COF-based SAWH systems are also discussed.