Engineered Graphitic Carbon Nitride-Based Photocatalysts for Visible-Light-Driven Water Splitting: A Review

• Published in: Energy & fuels Vol. 35; no. 8; pp. 6504 - 6526
• Main Authors: Wang, Shuaijun, Zhang, Jinqiang, Li, Bin, Sun, Hongqi, Wang, Shaobin
• Format: Journal Article
• Language: English
• Published: American Chemical Society 15.04.2021
• Subjects: carbon nitride; copolymerization; energy conversion; graphene; hydrogen; hydrogen production; photocatalysis; photocatalysts; polymers; semiconductors
• ISSN: 0887-0624; 1520-5029; 1520-5029
• DOI: 10.1021/acs.energyfuels.1c00503

Graphitic carbon nitride (g-C3N4), a polymeric semiconductor, has become a rising star for photocatalytic energy conversion because of its facile accessibility, metal-free nature, low cost, and environmentally benign properties. This work reviews the latest progress of g-C3N4-based materials in visible-light-driven water splitting to hydrogen. It begins with a brief history of g-C3N4, followed by various engineering strategies of g-C3N4, such as elemental doping, copolymerization, crystalline tailoring, surface engineering, and single-atom modification, for elevated photocatalytic water decomposition. In addition, the synthesis of g-C3N4 in different dimensions (0D, 1D, 2D, and 3D) and configurations of a series of g-C3N4-based heterojunctions (type II, Z-scheme, S-scheme, g-C3N4/metal, and g-C3N4/carbon heterojunctions) were also discussed for their improvement in photocatalytic hydrogen production. Lastly, the challenges and opportunities of g-C3N4-based nanomaterials are provided. It is anticipated that this review will promote the further development of the emerging g-C3N4-based materials for more efficiency in photocatalytic water splitting to hydrogen.