Bipyridinium-Based Ionic Covalent Triazine Frameworks for CO2, SO2, and NO Capture
Hai Zhu1, Wenjun Lin2, Qi Li1, Yin Hu1, Siyu Guo1, Congmin Wang2*（王从敏）, and Feng Yan1*（严锋）
1Jiangsu Key Laboratory of Advanced Functional Polymer Design and Application, Department of Polymer Science and Engineering, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, China
2Department of Chemistry, ZJU-NHU United R&D Center, Zhejiang University, Hangzhou 310027, China
ACS Appl. Mater. Interfaces2020, 12, 8614--8621
The exploitation of novel porous materials for capturing/adsorption of harmful gases is considered a very promising approach to deal with air pollution. Herein, bipyridinium-based ionic covalent triazine frameworks (ICTFs) were synthesized via ZnCl2-catalyzed ionothermal polymerization. The as-prepared ICTFs had a satisfactory total pore volume and specific surface of approximately 0.4582 cm3 g–1 and 1000 m2 g–1, respectively. Moreover, the specific surface area, pore size and distribution, and total pore volumes of ICTFs could be adjusted via ion-exchange of the anion. The obtained ICTFs were explored as the adsorbent for the separation/adsorption of the mixed gases (SO2, CO2, NO, and N2), and they showed the strong adsorption ability for CO2 (2.75 mmol g–1), SO2 (9.22 mmol g–1), and NO (4.05 mmol g–1) at 1 bar and 298 K. This unique design provides a new insight to prepare high-efficiency porous materials for CO2, SO2, and NO capture.