▎ 摘　　要

A series of metal-organic framework (UTSA-16)-graphene oxide composites was synthesized. These composites are the first reported examples of core-shell type metal-organic framework composites armored with graphene oxide film. The parent materials (UTSA-16 and graphene oxide) and the nanocomposites were characterized using XRD, SEM, TEM, TGA and gas adsorption. The composites showed a greatly improved thermal stability compared with their parent materials. The UTSA-16-GO19 composite has a CO2/CH4 selectivity of 114.4, which is three times greater than that of UTSA-16 alone; of the previously reported metal-organic frameworks, only the polyamine-incorporated amine-MIL-101-(Cr) has a higher CO2/CH4 selectivity. These graphene oxide composites provide a new direction for practical high-performance metal-organic framework materials.