Synthesis of benzotriazole functionalized ZIF-8 by postsynthetic modification for enhanced CH4 and CO2 uptakes


ERKARTAL M. , Incekara K., Sen U.

INORGANIC CHEMISTRY COMMUNICATIONS, vol.142, 2022 (Journal Indexed in SCI) identifier identifier

  • Publication Type: Article / Article
  • Volume: 142
  • Publication Date: 2022
  • Doi Number: 10.1016/j.inoche.2022.109696
  • Title of Journal : INORGANIC CHEMISTRY COMMUNICATIONS
  • Keywords: Nanoparticles, Porous materials, Surfaces, Metal-organic frameworks, Post-synthetic modification, METAL-ORGANIC FRAMEWORKS, ASSISTED LINKER EXCHANGE, NATURAL-GAS, SERIES

Abstract

In this work, a series of functionalized ZIF-8 were synthesized via incorporation of benzotriazole ligands into the framework with a post-synthetic method. The crystal structure and porosity were preserved for all functionalized samples. Although a relatively low percentage of ligand exchange (approximately 10-22%) was observed due to steric and kinetic effects, a remarkable improvement was found in CO2 and CH4 uptake capacities due to the incorporation of more polar N sites into the structure and the change in pore size of the frameworks. The resulting ZIF-8-S5 exhibited 45.17(CO2) and 15.08 (CH4) cm(3) g(-1) at 273 K under 1.2 bar, which corresponds to an enhancement of 20 and 35% compared to pristine ZIF-8. Further, all functionalized samples showed the significant improvement of selective CO2 over N-2.