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Title: On the direct synthesis of Cu(BDC) MOF nanosheets and their performance in mixed matrix membranes

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) (BDC 2-= 1,4-benzenedicarboxylate) nanosheets with an average lateral size of 2.5 mu m 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 CO 2/CH 4 selectivity compared with that of Matrimid. Finally, 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.

Authors:
 [1];  [1];  [2];  [1];  [3];  [4];  [1];  [5];  [1]
  1. Univ. of Minnesota, Minneapolis, MN (United States). Dept. of Chemical Engineering and Materials Science
  2. Univ. of California, Berkeley, CA (United States). Dept. of Chemical and Biomolecular Engineering
  3. Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States). Dept. of Chemical Engineering
  4. Argonne National Lab. (ANL), Argonne, IL (United States). Advanced Photon Source (APS), X-Ray Science Division
  5. Univ. of California, Berkeley, CA (United States). Dept. of Chemical and Biomolecular Engineering; Univ. of California, Berkeley, CA (United States). Dept. of Chemistry; Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Materials Sciences Division
Publication Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States); Energy Frontier Research Centers (EFRC) (United States). Center for Gas Separations Relevant to Clean Energy Technologies (CGS)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22); USDOE Office of Science - Office of Basic Energy Sciences - Scientific User Facilities Division; University of Minnesota
OSTI Identifier:
1426221
Grant/Contract Number:  
AC02-06CH11357; SC0001015
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Journal of Membrane Science
Additional Journal Information:
Journal Volume: 549; Journal Issue: C; Journal ID: ISSN 0376-7388
Publisher:
Elsevier
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY; 36 MATERIALS SCIENCE; metal organic frameworks; mixed matrix membranes; nanosheets

Citation Formats

Shete, Meera, Kumar, Prashant, Bachman, Jonathan E., Ma, Xiaoli, Smith, Zachary P., Xu, Wenqian, Mkhoyan, K. Andre, Long, Jeffrey R., and Tsapatsis, Michael. On the direct synthesis of Cu(BDC) MOF nanosheets and their performance in mixed matrix membranes. United States: N. p., 2017. Web. doi:10.1016/j.memsci.2017.12.002.
Shete, Meera, Kumar, Prashant, Bachman, Jonathan E., Ma, Xiaoli, Smith, Zachary P., Xu, Wenqian, Mkhoyan, K. Andre, Long, Jeffrey R., & Tsapatsis, Michael. On the direct synthesis of Cu(BDC) MOF nanosheets and their performance in mixed matrix membranes. United States. doi:10.1016/j.memsci.2017.12.002.
Shete, Meera, Kumar, Prashant, Bachman, Jonathan E., Ma, Xiaoli, Smith, Zachary P., Xu, Wenqian, Mkhoyan, K. Andre, Long, Jeffrey R., and Tsapatsis, Michael. Tue . "On the direct synthesis of Cu(BDC) MOF nanosheets and their performance in mixed matrix membranes". United States. doi:10.1016/j.memsci.2017.12.002.
@article{osti_1426221,
title = {On the direct synthesis of Cu(BDC) MOF nanosheets and their performance in mixed matrix membranes},
author = {Shete, Meera and Kumar, Prashant and Bachman, Jonathan E. and Ma, Xiaoli and Smith, Zachary P. and Xu, Wenqian and Mkhoyan, K. Andre and Long, Jeffrey R. and Tsapatsis, Michael},
abstractNote = {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 mu m 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. Finally, 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.},
doi = {10.1016/j.memsci.2017.12.002},
journal = {Journal of Membrane Science},
number = C,
volume = 549,
place = {United States},
year = {Tue Dec 05 00:00:00 EST 2017},
month = {Tue Dec 05 00:00:00 EST 2017}
}

Journal Article:
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