Ionic liquid functionalized multi-walled carbon nanotubes/zeolitic imidazolate framework hybrid membranes for efficient H2/CO2 separation

A ZIF-9 membrane covered by ionic liquid (ILs) functionalized carbon nanotubes (CNTs) was grown using heat treatment of the layer-by-layer deposition method. This hybrid membrane exhibits a high selectivity for H2/CO2 due to the cooperative effect of ZIFs, CNTs and ILs.