Fig. 3
From: Ultrathin metal–organic framework membrane production by gel–vapour deposition
Gas transport behaviours of ZIF-8 membranes. a Single gas transport behaviours through the ZIF-8 membrane prepared with sol concentration of 1 U, coating time of 2 s and vapour deposition time of 2 h. X n represents various gases. Permeation data were collected for two cycles over 274 h, from smallest H2 with kinetic diameter of 0.289 nm to largest C3H8 with kinetic diameter of 0.43 nm and then in reverse order. b Comparison of ZIF-8 membranes here with polymeric50, carbon47 and other MOF membranes in literatures for C3H6/C3H8 system. The black line is the upper bound of polymeric membranes50. The numerical data are shown in Supplementary Table 2. The permeance is calculated from the permeability by assuming membrane thickness of 1 μm. c Single gas permeation behaviours of different gas through ZIF-8 membranes prepared with various sol concentrations of 0.1, 1, 1.5 and 2 U. These ZIF-8 membranes were prepared with coating time of 2 s and vapour deposition time of 2 h
