Sorption-enhanced dual-ligand MOF-based mixed-matrix membranes for CO2 separation

Abstract

For the first time, a dual-ligand MOF, Al-Fum/Asp, was synthesized by partially replacing fumarate ligands in the Al-Fum framework with l-aspartic acid and incorporated into PIM-1 to fabricate mixed-matrix membranes. Amino groups anchored on Al-Fum/Asp enhance CO₂-adsorption, enabling the membrane to achieve CO₂/N₂ separation performance beyond the 2019 Robeson upper bound.