Deposition of chemically modified α-Al2O3 particles for high performance ZIF-8 membrane on a macroporous tube

Abstract

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.