Carbon ring and molecular scaffold co-doped g-C3N4 heterostructural nanosheets for highly efficient hydrogen evolution. (December 2021)

• Record Type: Journal Article
• Authors: Zhou, Ling; Hu, Kan; Dong, Tengguo; Wang, Qian; Huang, Hengming; Lu, Chunhua; Kou, Jiahui; Xu, Zhongzi
• Is Part Of: Materials research bulletin. Volume 144(2021)
• Publication Date: 2021-12
• Subjects: Graphitic carbon nitride -- Carbon ring -- Molecular scaffold -- Copolymerization -- Hydrogen evolution; Materials -- Periodicals; Crystal growth -- Periodicals; Matériaux -- Périodiques; Cristaux -- Croissance -- Périodiques; Crystal growth; Materials; Periodicals; 620.11
• DOI: 10.1016/j.materresbull.2021.111482
• Languages: English
• ISSNs: 0025-5408

Abstract

Highlights: l The interlayer stacking is loosened by embedding stereo molecular scaffold into graphitic carbon nitride framework. l The stereo molecular scaffold and carbon rings have a synergistic effect to improve the photocatalytic performance of g-C3 N4 . l The facile copolymerization method is designed for better exfoliating graphitic carbon nitride. l The hydrogen evolution activity of modified graphitic carbon nitride is well enhanced under ordinary pressure. Abstract: Copolymerization is an efficient method to modulate the intrinsic properties of graphitic carbon nitride (g-C3 N4 ). Herein, carbon ring and stereo molecular scaffold co-doped g-C3 N4 heterostrcutural nanosheets are constructed for simultaneously enhanced photocatalytic hydrogen evolution under ordinary pressure. The carbon ring changes the in-plane connection of g-C3 N4 by the sp 2 -hybridized CN bonds, extending the delocalization of π electrons. The stereo molecular scaffold loses the interlayer stacking of bulk g-C3 N4 for easier exfoliation. The synergistic effect of the above two aspects can greatly improve the photocatalytic performance of AGCN. After thermal exfoliation, the highest photocatalytic hydrogen generation activity of A0.2 G0.3 CN-E sample is 12.9 times higher than that of MCN. This work provides a strategy to design g-C3 N4 photocatalysts with enhanced photocatalytic activity by using synergistic effect. Graphical abstract: Image, graphical abstract