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Porous Graphene Oxide/Porous Organic Polymer Hybrid Nanosheets Functionalized Mixed Matrix Membrane for Efficient CO2 Capture.
ACS Applied Materials & Interfaces 2019 January 8
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 multi-layer, defect-free porous graphene oxide membrane with consistently sized nanopores is extremely challenging. Here, we prepared layer-by-layer CO2-philic Pebax@1657 membranes that functionalized by o-hydroxyazo-hierarchical porous organic polymers (o-POPs) and PGO. The d-spacing of pristine PGO could be finely regulated through CO2-philic o-POPs to facilitate the permeability of CO2. In addition, the o-POPs exhibit "N2-phobic, CO2-philic" properties with the phenolic hydroxyl and the azo group. The best of the POP-PGO membrane exhibit the CO2 permeability and ideal selectivity of CO2/N2 are 232.7 Barrer and 80.7, respectively, and it has surpassed the Robeson's upper bound (2008).
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