Amino-Functionalizing Ce-Based MOF UiO-66 for Enhanced CO2 Adsorption and Selectivity
John Senith Ravishan Fernando1, Shivani S Asaithambi2, Sachin Maruti Chavan1
1Department of Chemistry, Bioscience and Environmental Engineering, Faculty of Science and Technology, University of Stavanger, BOX 8600 Forus, 4036, Stavanger, Norway.
Chempluschem
|May 6, 2024
Summary
Amino functionalization of metal-organic frameworks (MOFs) like Ce-UiO-66 significantly enhances carbon dioxide (CO2) adsorption. This improved MOF material shows higher CO2 uptake and selectivity, making it promising for CO2 capture applications.
Area of Science:
- Materials Science
- Chemical Engineering
- Environmental Science
Background:
- Metal-organic frameworks (MOFs) offer high surface areas and tunable properties for CO2 adsorption.
- Functionalizing MOFs enhances their CO2 affinity, uptake capacity, and selectivity.
- Ce-UiO-66 is a promising MOF candidate for gas separation applications.
Purpose of the Study:
- To investigate the selective CO2 adsorption potential of amino-functionalized Ce-UiO-66.
- To evaluate the impact of amino functionalization on CO2 uptake and selectivity.
- To assess the structural stability of the functionalized MOF under gas and vapor sorption conditions.
Main Methods:
- Synthesis of amino-functionalized Ce-UiO-66 (Ce-UiO-66-NH2).
- Characterization using PXRD, FTIR, SEM, TGA, and BET surface area analysis.
- Gas sorption analysis for CO2, N2, and water vapor adsorption.
Main Results:
- Amino-functionalized Ce-UiO-66-NH2 exhibited a 63% increase in CO2 uptake compared to unmodified Ce-UiO-66.
- CO2/N2 selectivity was enhanced by 84% for Ce-UiO-66-NH2 at 273 K and 1 bar.
- The functionalized MOF demonstrated excellent structural stability post-sorption.
Conclusions:
- Amino functionalization is an effective strategy to boost CO2 adsorption and selectivity in Ce-UiO-66.
- Ce-UiO-66-NH2 presents a highly promising adsorbent material for efficient CO2 capture.
- The material's stability ensures its viability for practical CO2 separation processes.
