Enhanced electron delocalization on pyrimidine doped graphitic carbon nitride for boosting photocatalytic hydrogen evolution

被引：7
作者：
Chen, Yongfeng [1 ]
Lei, Lin [1 ]
Gong, Yuanbiao [1 ]
Wang, Hui [2 ]
Fan, Huiqing [1 ]
Wang, Weijia [1 ]
机构：
[1] Northwestern Polytech Univ, Sch Mat Sci & Engn, State Key Lab Solidificat Proc, Xian 710072, Peoples R China
[2] Fudan Univ, Dept Cultural Rel & Museums, Shanghai 200433, Peoples R China
来源：
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY | 2024年 / 51卷
基金：
中国国家自然科学基金;
关键词：
Hydrogen evolution; Electrons delocalization; Electronic band structure; EFFICIENT CHARGE SEPARATION; G-C3N4; HETEROJUNCTION; DRIVEN; NANOSHEETS; COMPOSITE;
D O I：
10.1016/j.ijhydene.2023.07.147
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
The photocatalytic activity of graphitic carbon nitride (g-C3N4) depends to a large extent on its morphology and electronic band structure. In order to design a photocatalyst with suitable structural property and high efficiency of photo-generated carrier separation, herein, the pyrimidine doped g-C3N4 is prepared by a conventional one-pot copolymeri-zation of urea and 2,4,6-Triaminopyrimidine (TAP). Such TAP organic molecule can not only regulate the electronic structure of conjugated system and distort heptazine units, but also affect the polymerization of precursor urea. As expected, the optimized photocatalyst shows a high photocatalytic hydrogen evolution activity of 453 mmol$h-1 under visible light irradiation, which is 4.41 times over that of pure g-C3N4. Such enhanced photocatalytic performance is attributed to the introduction of pyrimidine ring which facilitates the electrons delocalization in the in-plane structure, enlarges the specific surface area, and broadens the visible light absorption range.(c) 2023 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.
引用
收藏
页码：1058 / 1068
页数：11
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