Stimuli-responsive of magnetic metal-organic frameworks (MMOF): Synthesis, dispersion control, and its tunability into polymer matrix under the augmented-magnetic field for H2 separation and CO2 capturing applications

Single-crystal magnetic-responsive core-shell MOF by grafting Fe 3 O 4 nanoparticles onto the UiO-66-NH 2 and their controlled embedding into gas separation mixed matrix membranes was reported. Obtained results confirmed the stimuli-responsive character of the MMOF during their dispersion of MMOF in a well-defined arrays structure in the PMMA matrix. Contrarily, an absence of a magnetic field results in the MMOF aggregation and sedimentation of the particles at the bottom of the membrane. Compared to the non-controlled ones, gas permeability increased by 26.2% for CO 2 and 76.67% for H 2, and selectivity increased 2.95 and 1.49 times for the CO 2 /N 2 and H 2 /CO 2 gas pairs, respectively. Moreover, obtained permeability-selectivity values for the H 2 /CO 2 gas pairs overcome the appropriate modified 2008 Robeson upper bound. • Synthesis single crystal magnetic MOFs coreshell. • Fabricating Fe 3 O 4 -UiO-66-NH 2 -PMMA mixed matrix membrane. • Using magnetic field for alignment embedding of MMOFs. • Enhancement of H 2 separation and CO 2 capturing.