Metallic ion cross linked polymer of intrinsic microporosity (PIM-1) thin film composite (TR) membranes supported on an ultraviolet (UV)-cross-linked porous substrate were fabricated. The UV-cross-linked porous substrate was prepared via polymerization-induced phase separation. The PIM-1 TFC membranes were fabricated via a dip-coating procedure. Metallic ion-cross-linked PIM-1 TFC membranes were fabricated by hydrolyzing the PIM-1 TFC membrane in an alkali solution and then cross-linking it in a multivalent metallic ion solution. The pore size and porous structures were evaluated by low-temperature N-2 adsorption-desorption analysis. The membrane structure was investigated by field-emission scanning electron microscopy. The effects of heat treatment and pore-forming additives on the gas permeance of the UV-cross-linked porous substrate are reported. The effects of different pre-coating treatments on the gas permeance of the metallic ion-cross-linked NM-1 TEC membrane are also discussed. The metallic ion-cross-linked PIM-1 TFC membrane displayed high CO2/N-2 selectivity (23) and good CO2 permeance (1058 GPU). (C) 2018 The Chemical Industry and Engineering Society of China, and Chemical Industry press. All rights reserved.