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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) (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. 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:
; ; ; ; ; ; ; ;
Publication Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org.:
USDOE Office of Science - Energy Frontier Research Center; University of Minnesota; National Science Foundation (NSF); USDOE Office of Science - Office of Basic Energy Sciences - Scientific User Facilities Division
OSTI Identifier:
1426221
DOE Contract Number:
AC02-06CH11357
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Membrane Science; Journal Volume: 549; Journal Issue: C
Country of Publication:
United States
Language:
English
Subject:
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., 2018. 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. Thu . "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. 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 = {Thu Mar 01 00:00:00 EST 2018},
month = {Thu Mar 01 00:00:00 EST 2018}
}