Metal-organic frameworks grown on a porous planar template with an exceptionally high surface area: promising nanofiller platforms for CO2 separationElectronic supplementary information (ESI) available. See DOI: 10.1039/c7ta06049a

• Main Authors: Lee, Hyunhee, Park, Seul Chan, Roh, Ji Soo, Moon, Gi Hyeon, Shin, Jae Eun, Kang, Yong Soo, Park, Ho Bum
• Format: Journal Article
• Language: English
• Published: 07.11.2017
• ISSN: 2050-7488; 2050-7496
• DOI: 10.1039/c7ta06049a

Porous nanosheets made of effectively aligned zeolitic imidazolate framework-8 (ZIF-8), dubbed ZPGO, with an exceptionally high surface area (2170 m 2 g −1 ) were demonstrated. This composite was prepared by growing ZIF-8s on highly porous graphene oxide (PGO) and the mixed matrix membrane with such a nanofiller showed drastically improved size-selective CO 2 transport even at very low filler concentration (0.02 wt%) especially under mixed gas conditions where both selectivity (CO 2 /N 2 ∼57) and CO 2 permeability (∼163 barrer) were significantly enhanced. In addition to this, ZPGO effectively suppressed CO 2 -plasticization, which indicates great potential in real operations. This new concept of nanofillers is expected to maximize the filler effect in other fields benefitting from a high surface area as well. A new concept of nanocomposites, MOFs on porous two-dimensional nanosheets (MP 2 ), was demonstrated and showed great potential in real gas separation.