Two-dimensional Covalent Organic Frameworks: Intrinsic Synergy Promoting Photocatalytic Hydrogen Evolution

• Published in: Chemical research in Chinese universities Vol. 38; no. 2; pp. 373 - 381
• Main Authors: Liu, Shujing, Guo, Jia
• Format: Journal Article
• Language: English
• Published: Changchun Jilin University and The Editorial Department of Chemical Research in Chinese Universities 2022; Springer Nature B.V
• Subjects: Analytical Chemistry; Catalytic activity; Chemistry; Chemistry and Materials Science; Chemistry/Food Science; Conjugation; Hydrogen evolution; Inorganic Chemistry; Organic Chemistry; Photocatalysis; Photocatalysts; Physical Chemistry; Review; Water splitting; Covalent organic framework; Photocatalysis; Hydrogen evolution; Charge separation
• ISSN: 1005-9040; 2210-3171
• DOI: 10.1007/s40242-022-2007-z

C ovalent organic frameworks(COFs) are emerging photocatalysts for hydrogen evolution in water splitting in recent years. They offer a pre-designable platform to design tailor-made structures and chemically adjustable functionality in terms of photocatalysis. In this review, we summarize the recent striking progress of COF-based photocatalysts in design and synthesis. Firstly, different approaches to functionalizing building blocks, diversifying linkages, extending π -conjugation and establishing D-A conjugation are illustrated for enhancing photocatalytic activity. Next, post-modification of backbones and pores is detailed for emphasizing the synergistic catalytic uniqueness of COFs. Besides, the strategy of preparing COF-related composites with various semiconductors is outlined for optimizing the electronic properties. Finally, we conclude with the current challenges and promising opportunities for the exploration of new COF-based photocatalysts.