Synthesis, characterization and gas transport properties of MOF-5 membranes

► High quality thin MOF-5 membranes synthesized by secondary growth method. ► The quality of large pore MOF membranes examined by a molecular probbing method. ► A diffusion-dominating mechanism identified for gas permeation in MOF-5 membranes. ► CO2 diffusivity for MOF-5 determiend to be in 10−9 m2/s with Ea = 14.8 kJ/mol.