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Review ARTICLE Provisionally accepted The full-text will be published soon. Notify me

Front. Chem. | doi: 10.3389/fchem.2018.00551

Metal-free photocatalyst of graphitic carbon nitride goes into two-dimensional time

 Gang Zhao1, Hongcen Yang1, Mengqi Liu1 and  Xijin Xu1*
  • 1University of Jinan, China

Graphitic carbon nitride (g-C3N4), as a metal-free and visible-light-responsive photocatalyst, is always a research hotspot in the field of solar energy conversion (hydrogen-production of water splitting). Here, the critical review summarizes a panorama of the latest progress related to the design and syntheses of two-dimensional (2D) g-C3N4 and g-C3N4-based nanocomposites, including (1) the modifications of organic carbon nitrogen precursors, such as heat treatment, metal or metal-free atoms doping, and the modifications with organic functional groups, (2) the influence factors on the formation of two-dimensional g-C3N4 process, including the calcination temperature and protective atmosphere, etc, (3) newly 2D g-C3N4 nanosheets prepared from pristine raw material and bulk g-C3N4, and the combination of 2D g-C3N4 with other 2D semiconductors or metal atoms as cocatalysts, (4) the structures and characteristics of each classification of 2D g-C3N4 systems, together with their optical absorptions band structures and interfacial charge transfers. Apart from those, the first-principles density functional theory (DFT) calculations of the g-C3N4 systems will be summarized, and then to provide insightful outlooks on the development of 2D g-C3N4 photocatalysts. This comprehensive review will end up with a summary, and some exciting perspectives on the challenges and future directions of 2D g-C3N4 photocatalyst are discussed and highlighted in this research platform. It is expected that this review can excite a new research way to facilitate the next generation of 2D g-C3N4 photocatalysts with well performances.

Keywords: two-dimensional g-C3N4, Metal-free photocatalysts, Atoms doping, modification, Heterojunction

Received: 16 Jul 2018; Accepted: 25 Oct 2018.

Edited by:

Junguang Tao, Hebei University of Technology, China

Reviewed by:

Chunhai Jiang, Xiamen University of Technology, China
Lei Zhang, Shandong University, China  

Copyright: © 2018 Zhao, Yang, Liu and Xu. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

* Correspondence: Prof. Xijin Xu, University of Jinan, Jinan, China, sps_xuxj@ujn.edu.cn