Projects per year
Abstract
High aspect-ratio nanosheets of metal-organic frameworks (MOFs) hold promise for use as selective flakes in gas separation membranes. However, simple and scalable methods for the synthesis of MOF nanosheets have thus far remained elusive. Here, we describe the direct synthesis of Cu(BDC) (BDC2– = 1,4-benzenedicarboxylate) nanosheets with an average lateral size of 2.5 µm and a thickness of 25 nm from a well-mixed solution. Characterization of the nanosheets by powder and thin film X-ray diffraction, electron microscopy, and electron diffraction reveals pronounced structural disorder that may affect their pore structure. Incorporation of the Cu(BDC) nanosheets into a Matrimid polymer matrix results in mixed matrix membranes (MMMs) that exhibit a 70% increase in the CO2/CH4 selectivity compared with that of Matrimid. Analysis of new and previously reported permeation data for Cu(BDC) MMMs using a mathematical model for selective flake composites indicates that further performance improvements could be achieved with the selection of different polymers for use in the continuous phase.
Original language | English (US) |
---|---|
Pages (from-to) | 312-320 |
Number of pages | 9 |
Journal | Journal of Membrane Science |
Volume | 549 |
DOIs | |
State | Published - Mar 1 2018 |
Bibliographical note
Funding Information:This work was supported by the Center for Gas Separations Relevant to Clean Energy Technologies, an Energy Frontier Research Center funded by the US Department of Energy, Office of Science, Basic Energy Sciences under Award DE-SC0001015 . SEM, TEM and AFM characterization were carried out in the Characterization Facility, University of Minnesota, which receives partial support from the NSF through the MRSEC and NNIN programs, respectively. SEM measurements were partially performed on a Hitachi 8230 provided by NSF MRI DMR-1229263. This research used the resources at the beamline 17-BM (powder XRD) and 33-BM-C (thin film XRD measurements) of the Advanced Photon Source, a US Department of Energy (DOE) Office of Science User Facility operated for the DOE Office of Science by Argonne National Laboratory under contract no. DE-AC02-06CH11357 .
Keywords
- Metal organic frameworks
- Mixed matrix membranes
- Nanosheets
How much support was provided by MRSEC?
- Shared
Reporting period for MRSEC
- Period 4
Fingerprint Dive into the research topics of 'On the direct synthesis of Cu(BDC) MOF nanosheets and their performance in mixed matrix membranes'. Together they form a unique fingerprint.
Projects
-
MRSEC IRG-2: Sustainable Nanocrystal Materials
Kortshagen, U. R., Aydil, E. S., Campbell, S. A., Francis, L. F., Haynes, C. L., Hogan, C., Mkhoyan, A., Shklovskii, B. I. & Wang, X.
9/1/98 → …
Project: Research project
-