Porous Graphene Oxide/Porous Organic Polymer Hybrid Nanosheets Functionalized Mixed Matrix Membrane for Efficient CO2 Capture

The computational simulation of porous graphene oxide (PGO) indicated that it has great potential for the preparation of gas separation membranes. However, scaling up the manufacture of multilayer, defect-free porous graphene oxide membrane with consistently sized nanopores is extremely challenging. Here, we prepared layer-by-layer COrphilic Pebax@1657 membranes that were functionalized by o-hydroxyazo-hierarchical porous organic polymers (o-POPs) and PGO. The d-spacing of pristine PGO could be finely regulated through COrphilic o-POPs to facilitate the permeability of CO,. In addition, the o-POPs exhibit "N-2-phobic, CO2-philic" properties with the phenolic hydroxyl and the azo group. The best of the POP-PGO membrane exhibits that the CO, permeability and ideal selectivity of CO2/N-2 are 232.7 Barrer and 80.7, respectively, and it has surpassed the Robeson's upper bound (2008).