Chang Xin, Wang Ye, Zhou Xuejiao, Song Yi, Zhang Mingyi
Key Laboratory for Photonic and Electronic Bandgap Materials, Ministry of Education, School of Physics and Electronic Engineering, Harbin Normal University, Harbin 150025, PR China.
Institute of Data Science and Artificial Intelligence, Harbin Huade University, Harbin 150025, PR China.
Dalton Trans. 2021 Dec 7;50(47):17618-17624. doi: 10.1039/d1dt03385a.
In this study, a metal-organic framework (ZIF-8)-derived nitrogen-doped carbon (C-ZIF)-modified g-CN composite was directly prepared by pyrolysis. C-ZIF@g-CN composites with different loadings were prepared by changing the precursor content. The charge transfer process that occurs at the interface of the ZIF-8-derived nitrogen-doped carbon/g-CN heterostructures strongly hinders the recombination of photoinduced electron-hole pairs, thereby effectively enhancing the photocatalytic activity of C-ZIF@g-CN. Meanwhile, the unique hierarchical inorganic/organic heterostructure provides an abundance of active sites for photocatalytic reactions. Upon visible-light irradiation, C-ZIF@g-CN with an optimal ratio of g-CN to C-ZIF components exhibits both enhanced photocatalytic activity and excellent separability during the degradation of dye and hydrogen evolution compared to unmodified g-CN.
在本研究中，通过热解直接制备了一种金属有机框架（ZIF-8）衍生的氮掺杂碳（C-ZIF）修饰的g-CN复合材料。通过改变前驱体含量制备了不同负载量的C-ZIF@g-CN复合材料。在ZIF-8衍生的氮掺杂碳/g-CN异质结构界面处发生的电荷转移过程强烈阻碍了光生电子-空穴对的复合，从而有效地提高了C-ZIF@g-CN的光催化活性。同时，独特的分级无机/有机异质结构为光催化反应提供了丰富的活性位点。在可见光照射下，与未修饰的g-CN相比，具有最佳g-CN与C-ZIF组分比例的C-ZIF@g-CN在染料降解和析氢过程中均表现出增强的光催化活性和优异的可分离性。
