Abstract
The liquid-phase epitaxy (LPE) method was effectively implemented to deliberately grow/construct ultrathin (0.5-1 mu m) continuous and defect-free ZIF-8 membranes. Permeation properties of different gas pair systems (O-2-N-2, H-2-CO2, CO2-CH4, C3H6-C3H8, CH4-n-C4H10) were studied using the time lag technique.