Organosilica functionalized zeolitic imidazolate framework ZIF-90 membrane for CO2/CH4 separation

- Pure and dense ZIF-90 membranes with shape-selectivity were prepared.
- With APTES modification, the membrane permselectivity increases.
- For the separation of CO2/CH4 mixture, a good CO2/CH4 selectivity of 4.7 is obtained.