Molecular Heterostructures of Covalent Triazine Frameworks for Enhanced Photocatalytic Hydrogen Production

作者：

Wei Huang, Qing He, Yongpan Hu, and Yanguang Li*

单位：

Institute of Functional Nano and Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials and Devices, Soochow University, Suzhou 215123, China.

摘要：

Conjugated polymers have emerged as promising candidates for photocatalytic H₂ production owing to their structural designability and functional diversity. However, the fast recombination of photoexcited electrons and holes limits their H₂ production rates. We have now designed molecular heterostructures of covalent triazine frameworks to facilitate charge-carrier separation and promote photocatalytic H₂ production. Benzothiadiazole and thiophene moieties were selectively incorporated into the covalent triazine frameworks as electron-withdrawing and electron-donating units, respectively, by a sequential polymerization strategy. The resulting hybrids exhibited much improved harge-carrier-separation efficiency as evidenced by photophysical and electrochemical characterization. An H₂ evolution rate of 6.6 mmolg^-1h^-1 was measured for the optimal sample under visible-light irradiation (λ> 420 nm), which is far superior to that of most reported conjugated-polymer photocatalysts.

影响因子：

12.102

分区情况：

一区

链接：

https://onlinelibrary.wiley.com/doi/full/10.1002/anie.201900046