4.8 Review

Design, Fabrication, and Mechanism of Nitrogen-Doped Graphene-Based Photocatalyst

Journal

ADVANCED MATERIALS
Volume 33, Issue 9, Pages -

Publisher

WILEY-V C H VERLAG GMBH
DOI: 10.1002/adma.202003521

Keywords

CO2 reduction; nitrogen-doped graphene structure; nitrogen-doped graphene based photocatalysis; nitrogen-doped graphene synthesis

Funding

  1. National Natural Science Foundation of China [51961135303, 51932007, U1905215, 21871217, U1705251]
  2. National Key Research and Development Program of China [2018YFB1502001]
  3. Innovative Research Funds of Foshan Xianhu Laboratory of the Advanced Energy Science and Technology Guangdong Laboratory [XHD2020-001]
  4. General Research Fund-Research Grant Council of Hong Kong Government [18301117]
  5. Dean Research Fund 19-20, EdUHK

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Nitrogen-doped graphene (NG) as a derivative of graphene, with the ability to break the undifferentiated structure, open the bandgap, and provide an uneven electron density distribution, retains the advantages of graphene while offering novel properties for photocatalysis. With wide applications in hydrogen production, CO2 reduction, pollutant degradation, and other directions, NG-based photocatalysis shows great potential for addressing energy and environmental challenges.
Solving energy and environmental problems through solar-driven photocatalysis is an attractive and challenging topic. Hence, various types of photocatalysts have been developed successively to address the demands of photocatalysis. Graphene-based materials have elicited considerable attention since the discovery of graphene. As a derivative of graphene, nitrogen-doped graphene (NG) particularly stands out. Nitrogen atoms can break the undifferentiated structure of graphene and open the bandgap while endowing graphene with an uneven electron density distribution. Therefore, NG retains nearly all the advantages of original graphene and is equipped with several novel properties, ensuring infinite possibilities for NG-based photocatalysis. This review introduces the atomic and band structures of NG, summarizes in situ and ex situ synthesis methods, highlights the mechanism and advantages of NG in photocatalysis, and outlines its applications in different photocatalysis directions (primarily hydrogen production, CO2 reduction, pollutant degradation, and as photoactive ingredient). Lastly, the central challenges and possible improvements of NG-based photocatalysis in the future are presented. This study is expected to learn from the past and achieve progress toward the future for NG-based photocatalysis.

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