Post‐Synthesized Method on Amine‐Functionalized MOF Membrane for CO 2 /CH 4 Separation

The development of membranes for highly efficient CO 2 separation from CH 4 is important. Herein a CAU‐1 metal‐organic framework membrane with –NH 2 functional groups was prepared and post‐synthetically modified with 3‐isocyanatopropyltriethox‐ysilane molecules. The post‐synthesized membrane demonstrates improved energetic interactions for CO 2 over CH 4 obtaining an ideal selectivity of 21.2 at 10 °C and 14.9 at 30 °C.