A new UiO-66-NH2 based mixed-matrix membranes with high CO2/CH4 separation performance

A new UiO-66-NH2 based MOF named UiO-66-NH2@ICA has been prepared by grafting imidazole-2-carbaldehyde (ICA) to UiO-66-NH2 through a post-synthesis reaction via amine condensation. FESEM, XRD, 1H NMR, FT-IR and N2 adsorption were used to characterize the morphology and structure of UiO-66-NH2@ICA. The grafted ICA mainly reduces the pore volume of UiO-66-NH2 but increases the number of nitrogen atom as binding site of CO2. The UiO-66-NH2@ICA...