Covalent Organic Frameworks: Cutting‐Edge Materials for Carbon Dioxide Capture and Water Harvesting from Air

The implacable rise of carbon dioxide (CO2) concentration in the atmosphere and acute water stress are one of the central challenges of our time. Present‐day chemistry is strongly inclined towards more sustainable solutions. Covalent organic frameworks (COFs), attributable to their structural designability with atomic precision, functionalizable chemical environment and robust extended architectures, have demonstrated promising performances in CO2 trapping and water harvesting from air. In this Review, we discuss the major developments in this field as well as sketch out the opportunities and shortcomings that remain over large‐scale COF synthesis, device engineering, and long‐term performance in real environments.