光催化
石墨氮化碳
材料科学
光化学
离域电子
可见光谱
氮化碳
共轭体系
制氢
化学工程
氢
化学
催化作用
有机化学
光电子学
聚合物
工程类
复合材料
作者
Yongfeng Chen,Lin Lei,Yutong Gong,Hui Wang,Huiqing Fan,Weijia Wang
标识
DOI:10.1016/j.ijhydene.2023.07.147
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 copolymerization 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 μmol·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.
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