异质结
共价键
光催化
光化学
材料科学
胺气处理
介孔材料
二亚胺
甲烷氧化偶联
石墨氮化碳
亚胺
氮化碳
化学工程
化学
分子
光电子学
有机化学
催化作用
工程类
苝
作者
Chuanwang Xing,Guiyang Yu,Ting Chen,Shanshan Liu,Qiqi Sun,Qi Liu,Yujia Hu,Heyuan Liu,Xiyou Li
标识
DOI:10.1016/j.apcatb.2021.120534
摘要
Photocatalytic oxidative coupling of amines is a promising method for imine synthesis. In this paper, a robust covalently-bonded direct Z-scheme heterostructure (PDI/mpgCN) for photocatalytic oxidative coupling of amine was reported for the first time. Perylenetetracarboxylic diimide (PDI) molecules were covalently connected to the surface of mesoporous carbon nitride (mpgCN) via an in-situ condensation strategy. Compared with the poor conversion efficiency upon pristine g-C3N4, PDI/mpgCN heterostructure exhibits a remarkable enhancement on amine oxidation rate (AOR), with the optimal AOR reaches to as high as 20.63 mmol g−1 h−1 upon 20 % PDI/mpgCN. As far as we know, it is the highest AOR achieved so far for amine photooxidation coupling with heterojunction materials. Transient absorption studies proved the formation of Z-scheme junction, and efficient interfacial charge transfer. Our study not only makes an insight into the heterojunction design with chemical bond precision, but highlights the great prospects of Z-scheme photocatalyst in photo-chemical synthesis.
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