Research Progress in Preparing Methods of g-C3N4 Nanosheets by Exfoliation

被引：0
|
作者：
Dong W. [1 ,2 ]
Chang Q. [1 ]
Wang W. [1 ]
Yang S. [1 ,2 ]
机构：
[1] School of Materials Science and Engineering, Liaoning Technical University, Liaoning, Fuxin
[2] Key Laboratory of Mineral High Value Conversion and Energy Storage Materials of Liaoning Province, Liaoning, Fuxin
来源：
Kuei Suan Jen Hsueh Pao/Journal of the Chinese Ceramic Society | 2023年 / 51卷 / 07期
关键词：
exfoliation process; graphitic carbon nitrides; nanosheets; photocatalysis;
D O I：
10.14062/j.issn.0454-5648.20230090
中图分类号：
学科分类号：
摘要：
Graphitic carbon nitride (g-C3N4) is a typical sp2 π conjugated polymer semiconductor material with a variety of unique physical and chemical properties. However, g-C3N4 obtained by a conventional calcination method has some shortcomings such as small specific surface area, a few exposed active sites, and a poor dispersibility in aqueous solution, restricting its practical application. Compared with bulk g-C3N4, g-C3N4 nanosheets obtained by different exfoliation processes have attracted much attention in the fields of energy, catalysis and sensing due to their high specific surface area, short carrier path, abundant active sites and large band gap. g-C3N4 has some disadvantages of nanosheet agglomeration, high energy consumption, long time consumption and low yield in the exfoliation preparation process. It is thus necessary to develop a green and cost-effective method for the preparation of g-C3N4 nanosheets. This paper reviewed the exfoliation mechanisms of top-down liquid exfoliation, chemical exfoliation and thermal exfoliation. The structure, composition, lamellar thickness and specific surface area of g-C3N4 nanosheets obtained by three methods were compared. In addition, some applications in photocatalysis were introduced, and the future development of g-C3N4 nanosheets was also prospected. © 2023 Chinese Ceramic Society. All rights reserved.
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页码：1868 / 1882
页数：14
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