Journal
ENERGYCHEM
Volume 3, Issue 2, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.enchem.2021.100051
Keywords
Photocatalysis; Energy conversion; G-C3N4; 2D cocatalyst; 2D/2D heterojunction
Categories
Funding
- National Natural Science Foundation of China [51961135303, 51932007, U1905215, 21871217, U1705251]
- National Key Research and Development Program of China [2018YFB1502001]
- Innovative Research Funds of Foshan Xianhu Laboratory of the Advanced Energy Science and Technology Guangdong Laboratory [XHD2020-001]
- General Research Fund-Research Grant Council of Hong Kong Government [18301117, 18300920]
- EdUHK
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This paper introduces the current research status of g-C3N4 in photocatalysis strengthened by 2D cocatalysts, highlighting the advantages of 2D/2D heterojunctions and their application in STC energy conversion. The future development and challenges are also discussed.
The appropriate band structure endows graphitic carbon nitride (g-C3N4) with benign redox ability and visible light response, resulting in its popularity in photocatalysis. Given the inferior solar-to-chemical (STC) energy conversion of single-component g-C3N4, loading cocatalysts is serviceable in advancing its photocatalytic activity. In particular, two-dimensional (2D) cocatalysts that could form 2D/2D heterojunctions with g-C3N4 stand out due to several advantages in which the large-area contact interface with g-C3N4 predominates. Herein, the basic information of g-C3N4 was first introduced. Then, representative 2D cocatalysts (e.g., graphene, graphdiyne, molybdenum disulfide, black phosphorus, and MXenes) used to strengthen the STC energy conversion of g-C3N4 were presented. Afterwards, the foremost achievements of g-C3N4 decorated with 2D cocatalysts in STC energy conversion were described in terms of photocatalytic hydrogen evolution, carbon dioxide reduction, hydrogen peroxide production, and nitrogen fixation. Finally, the future development and challenge of photocatalysts decorated with 2D cocatalysts were prospected. This paper could hopefully deepen the readers' understanding of 2D cocatalysts in photocatalysis and attach importance to 2D cocatalysts described in this paper and many others not mentioned.
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