Covalent organic framework and hydrogen-bonded organic framework for solar-driven photocatalysis

The newly emerging porous crystalline materials, covalent organic framework (COF) and hydrogen-bonded organic framework (HOF), are characterized by their large surface area, considerable structural diversity, and functional tailorability. Combining these properties, they are considered to have the potential for photocatalysis. This review summarizes their advantages and compatibility, particularly focusing on design strategies to overcome the existing issues of poor charge conductivity and deficient active sites. With representative examples of solar-driven hydrogen (H 2 ) evolution and carbon dioxide (CO 2 ) reduction, the exploration and expectation of such functional porous materials are presented. The features of COF and HOF in porosity, light harvesting, and structural multifunctionality enable their application for photocatalysis. Focusing on the existing merits, rational developing way is helpful for constructing more excellent porous photocatalyst.