Amino-Functionalized Ionic-Liquid-Grafted Covalent Organic Frameworks for High-Efficiency CO2 Capture and Conversion
Meilin Yin1, Lipeng Wang1, Shaokun Tang1
1Key Laboratory for Green Chemical Technology of Ministry of Education, School of Chemical Engineering & Technology, Tianjin University, Tianjin300354, China.
ACS Applied Materials & Interfaces
|December 10, 2022
Summary
Chemically grafting amino-functionalized imidazole ionic liquid onto covalent organic frameworks creates advanced materials for enhanced carbon dioxide capture and conversion. These novel materials show improved CO2 capture capacity and efficient cyclic carbonate production.
Area of Science:
- Materials Science
- Chemical Engineering
- Environmental Science
Background:
- Developing advanced materials for carbon capture and utilization (CCU) is critical for mitigating climate change.
- Covalent organic frameworks (COFs) offer tunable porosity and high surface area for gas adsorption.
- Functionalizing COFs with specific chemical groups can enhance their performance for targeted applications.
Purpose of the Study:
- To synthesize and characterize a series of novel composite materials by integrating amino-functionalized imidazole ionic liquid (NH2-IL) into mesoporous covalent organic framework materials ([HO]-TAPT-COFs).
- To evaluate the CO2 capture performance of the as-fabricated materials.
- To investigate the catalytic activity of the composite materials in the cycloaddition of CO2 and epoxides for cyclic carbonate synthesis.
Main Methods:
- Fabrication of [AeImBr]-TAPT-COFs via chemical grafting of NH2-IL onto [HO]-TAPT-COFs.
- Characterization of the materials using relevant analytical techniques.
- Testing CO2 equilibrium capture capacity and catalytic performance in CO2-epoxide cycloaddition reactions.
Main Results:
- The synthesized [AeImBr]-TAPT-COFs exhibited significantly higher CO2 capture activity compared to the parent [HO]-TAPT-COFs.
- CO2 equilibrium capture capacity increased from 62.6 to 117.4 mg/g with the integration of NH2-IL.
- [AeImBr]83%-TAPT-COF achieved a CO2 capture capacity of 117.4 mg/g and a 99.1% yield of cyclochloroallyl carbonate.
- The composite materials demonstrated excellent stability and recyclability, with high performance maintained over multiple cycles.
Conclusions:
- The chemical grafting of NH2-IL onto TAPT-COFs is an effective strategy to create advanced materials for CO2 capture.
- The resulting [AeImBr]-TAPT-COFs show enhanced CO2 adsorption and efficient catalytic activity for cyclic carbonate synthesis.
- These materials hold promise for sustainable CO2 utilization applications due to their high performance and stability.
