Fig. 4
From: Ultrathin metal–organic framework membrane production by gel–vapour deposition
ZIF-8 hollow fibre module. a Optical photograph of ZIF-8 hollow fibre membrane module. SEM images of b top and c cross-sectional view of the ZIF-8 membrane in module. Scale bar, 400 nm (in b) and 2 μm (in c). d Gas permeation behaviours of various gases through the ZIF-8 hollow fibre membrane module
