Abstract
We reported a new polymorphous core-shell metal-organic framework (MOF) in the form of a three-dimensional MOF core wrapped in a two-dimensional layered MOF shell by applying a general acid-solvent synergy synthesis. This hybrid material can achieve high adsorptive selectivity/capacity simultaneously, which is validated by the unary isotherms of CO2 and N2 conducted at 273 K (0-1 bar). The MOF-S@MOF-C with a 7-day exchange showed the highest CO2/N2 selectivity (32.7) among our samples and a moderate CO2 capacity (2.3 mmol/g), which are 3 times and 1.6 times those of the MOF-C and MOF-S, respectively. We attributed the enhanced selective adsorption performance to the negligible N2 uptake exhibited by the outer shell of MOF-S@MOF-C. This study provides a new route for elevating gas separation performance by constructing multifunctional core-shell materials.
| Original language | English |
|---|---|
| Pages (from-to) | 30234-30239 |
| Journal | ACS applied materials & interfaces |
| Volume | 11 |
| Issue number | 33 |
| Online published | 24 Jul 2019 |
| DOIs | |
| Publication status | Published - 11 Aug 2019 |
Research Keywords
- CO2 separation
- core-shell
- gas adsorption
- in situ synchrotron powder X-ray diffraction
- metal-organic frameworks
Publisher's Copyright Statement
- COPYRIGHT TERMS OF DEPOSITED POSTPRINT FILE: This document is the Accepted Manuscript version of a Published Work that appeared in final form in ACS applied materials & interfaces, copyright © American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work see http://pubs.acs.org/articlesonrequest/AOR-tr4JKd7i4VZbhQGjzvV8.
