Nanoporous film-mediated growth of ultrathin and continuous metal–organic framework membranes for high-performance hydrogen separation

Abstract

An ultrathin and continuous ZIF-8 membrane as thin as ∼550 nm was fabricated via a spatially confined contra-diffusion process, in which a nanoporous network film is utilized as an interlayer mediator to control the nucleation and growth of ZIF-8 crystals. The membrane exhibits a high H₂ permeance up to 6.31 × 10⁻⁷ mol m⁻² s⁻¹ pa⁻¹ and simultaneously maintains a high ideal selectivity of 43 for H₂/CO₂.