Through deposition of APTES-functionalized Al2O3 particles onto a coarse macroporous support, a new strategy to reduce the pore size and simutaneously promote a high density of heterogeneous nucleation sites was developed, and a continuous and thin ZIF-8 membrane exhibiting remarkably high H2 permeance of 5.73 × 10−5 mol m−2 s−1 Pa−1 and H2/N2 ideal selectivity of 15.4 was achieved.
