Wang Yongchao, Yang Qing, Yi Fangli, Lu Ruowei, Chen Yanxia, Liu Cheng, Li Xinyu, Wang Cuijuan, Yan Hongjian
Department of Chemistry and Chemical Engineering, School of Life Science and Engineering, Southwest Jiaotong University, Chengdu, Sichuan 610031, P. R. China.
College of Chemistry, Sichuan University, Chengdu, Sichuan 610064, P. R. China.
ACS Appl Mater Interfaces. 2021 Jun 30;13(25):29916-29925. doi: 10.1021/acsami.1c06008. Epub 2021 Jun 17.
The poor stability and low catalytic activity of NH-UiO-66 in basic solutions require the reactions to be conducted in acidic solutions, which seriously hinders its potential photocatalytic application. Herein, we report that NH-UiO-66 coated with two-dimensional covalent organic frameworks (COFs) via imine bond connection presents not only high photocatalytic activity but also high stability and adaptability to the solution environment. The NH-UiO-66/COF hybrid material was fabricated through the Schiff base reaction of NH-UiO-66 with 4,4',4″-(1,3,5-triazine-2,4,6-triyl)trianiline (TAPT) and 2,4,6-triformylphloroglucinol (TP). The hybrid material showed high stability in an alkaline environment, with only 4.7% of NH-UiO-66 decomposed after the photocatalytic reaction. The optimum photocatalytic H evolution rate was 8.44 mmol·h·g when triethanolamine was used as an electron-donating agent. The results presented here illustrate the possibility for effectively improving both the photocatalytic performance and stability of NH-UiO-66 by coupling with COFs.
NH-UiO-66在碱性溶液中稳定性差且催化活性低，这要求反应在酸性溶液中进行，这严重阻碍了其潜在的光催化应用。在此，我们报道通过亚胺键连接包覆二维共价有机框架（COF）的NH-UiO-66不仅具有高光催化活性，而且对溶液环境具有高稳定性和适应性。NH-UiO-66/COF杂化材料是通过NH-UiO-66与4,4',4″-(1,3,5-三嗪-2,4,6-三基)三苯胺（TAPT）和2,4,6-三(甲酰基)间苯三酚（TP）的席夫碱反应制备的。该杂化材料在碱性环境中表现出高稳定性，光催化反应后只有4.7%的NH-UiO-66分解。以三乙醇胺作为电子给体时，最佳光催化析氢速率为8.44 mmol·h·g。此处给出的结果说明了通过与COF耦合有效提高NH-UiO-66光催化性能和稳定性的可能性。
