Intramolecular heterostructured carbon nitride with heptazine-triazine for enhanced photocatalytic hydrogen evolution

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作者：
Ruan, Xiaowen [1 ]
Cui, Xiaoqiang [1 ]
Jia, Guangri [1 ]
Wu, Jiandong [1 ]
Zhao, Jingxiang [3 ]
Singh, David J. [1 ,2 ]
Liu, Yanhua [1 ]
Zhang, Haiyan [1 ]
Zhang, Lei [4 ]
Zheng, Weitao [1 ]
机构：
[1] State Key Laboratory of Automotive Simulation and Control, School of Materials Science and Engineering, Key Laboratory of Automobile Materials of MOE, Jilin University, 2699 Qianjin Street, Changchun,130012, China
[2] Department of Physics and Astronomy and Department of Chemistry, University of Missouri, Columbia,MO,65211, United States
[3] Key Laboratory of Photonic and Electronic Bandgap Materials, Ministry of Education, and College of Chemistry and Chemical Engineering, Harbin Normal University, Harbin,150025, China
[4] College of Chemistry, Jilin University, 2699 Qianjin Street, Changchun,130012, China
来源：
Chemical Engineering Journal | 2022年 / 428卷
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摘要：
Efficient separation and transfer of photogenerated carriers is vital for efficient photocatalytic hydrogen evolution. We report development of a new type of intramolecular heterostructure graphitic carbon nitride with heptazine-triazine (CN-HT) by use of a one-step thermal polymerization method. This intramolecular heterostructure changes the electronic structure to promote charge transfer and enhances the adsorption of H*. The as-prepared CN-HT exhibits superior photocatalytic hydrogen evolution of 88.29 μmol/h, which is 14.2 times that of pristine CN. The apparent quantum yield is 10.1% at 400 nm and 9.6% at 450 nm. The efficient separation and transfer of photogenerated carriers as well as the expanded visible light absorption in this intramolecular CN heterostructure contribute to the efficient utilization of photogenerated carriers, thus enhancing the photocatalytic hydrogen evolution. © 2021
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