Radiation-induced preparation of Zn(bdc)(dabco)0.5 membrane and its light hydrocarbon adsorption performance
This article describes the preparation of continuous metal-organic framework(MOF)Zn(bdc)(dabco)0.5 membranes on flexible polymer substrates using a radiation-induced method.The morphologies and structures of the membranes were investigated using X-ray diffraction,Fourier-transform infrared spectroscopy,and scanning electron microscopy.Their light hydrocarbon-adsorption properties were characterized using Brunauer-Emmett-Teller specific surface area measurements,density functional theory pore-size analysis,and single-component adsorption isotherms.The results indicated that the Zn(bdc)(dabco)0.5 membranes exhibited higher adsorption for ethane and propane than for methane.Moreover,the Zn(bdc)(dabco)0.5 membranes showed enhanced ethane/methane selectivity(reaching 11 at atmospheric pressure)and propane/methane selectivity(reaching 10 at atmospheric pressure).This study demonstrates the unique advantages of MOF membranes in the field of separation.