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Title: Nanofiltration across Defect-Sealed Nanoporous Monolayer Graphene

Abstract

Monolayer nanoporous graphene represents an ideal membrane for molecular separations, but its practical realization is impeded by leakage through defects in the ultrathin graphene. Here, we report a multiscale leakage-sealing process that exploits the nonpolar nature and impermeability of pristine graphene to selectively block defects, resulting in a centimeter-scale membrane that can separate two fluid reservoirs by an atomically thin layer of graphene. After introducing subnanometer pores in graphene, the membrane exhibited rejection of multivalent ions and small molecules and water flux consistent with prior molecular dynamics simulations. The results indicate the feasibility of constructing defect-tolerant monolayer graphene membranes for nanofiltration, desalination, and other separation processes.

Authors:
 [1];  [1];  [1];  [2];  [3];  [4];  [3];  [1]
  1. Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States). Dept. of Mechanical Engineering
  2. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Center for Nanophase Materials Science (CNMS)
  3. Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States). Dept. of Electrical Engineering and Computer Science
  4. King Fahd Univ. of Petroleum and Minerals (KFUPM), Dhahran (Saudi Arabia). Dept. of Mechanical Engineering
Publication Date:
Research Org.:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States). Center for Nanophase Materials Sciences (CNMS)
Sponsoring Org.:
USDOE Office of Science (SC)
OSTI Identifier:
1265473
Grant/Contract Number:  
AC05-00OR22725
Resource Type:
Accepted Manuscript
Journal Name:
Nano Letters
Additional Journal Information:
Journal Volume: 15; Journal Issue: 5; Journal ID: ISSN 1530-6984
Publisher:
American Chemical Society
Country of Publication:
United States
Language:
English
Subject:
77 NANOSCIENCE AND NANOTECHNOLOGY; graphene; desalination; stem

Citation Formats

O'Hern, Sean C., Jang, Doojoon, Bose, Suman, Idrobo Tapia, Juan Carlos, Song, Yi, Laoui, Tahar, Kong, Jing, and Karnik, Rohit. Nanofiltration across Defect-Sealed Nanoporous Monolayer Graphene. United States: N. p., 2015. Web. doi:10.1021/acs.nanolett.5b00456.
O'Hern, Sean C., Jang, Doojoon, Bose, Suman, Idrobo Tapia, Juan Carlos, Song, Yi, Laoui, Tahar, Kong, Jing, & Karnik, Rohit. Nanofiltration across Defect-Sealed Nanoporous Monolayer Graphene. United States. doi:10.1021/acs.nanolett.5b00456.
O'Hern, Sean C., Jang, Doojoon, Bose, Suman, Idrobo Tapia, Juan Carlos, Song, Yi, Laoui, Tahar, Kong, Jing, and Karnik, Rohit. Mon . "Nanofiltration across Defect-Sealed Nanoporous Monolayer Graphene". United States. doi:10.1021/acs.nanolett.5b00456. https://www.osti.gov/servlets/purl/1265473.
@article{osti_1265473,
title = {Nanofiltration across Defect-Sealed Nanoporous Monolayer Graphene},
author = {O'Hern, Sean C. and Jang, Doojoon and Bose, Suman and Idrobo Tapia, Juan Carlos and Song, Yi and Laoui, Tahar and Kong, Jing and Karnik, Rohit},
abstractNote = {Monolayer nanoporous graphene represents an ideal membrane for molecular separations, but its practical realization is impeded by leakage through defects in the ultrathin graphene. Here, we report a multiscale leakage-sealing process that exploits the nonpolar nature and impermeability of pristine graphene to selectively block defects, resulting in a centimeter-scale membrane that can separate two fluid reservoirs by an atomically thin layer of graphene. After introducing subnanometer pores in graphene, the membrane exhibited rejection of multivalent ions and small molecules and water flux consistent with prior molecular dynamics simulations. The results indicate the feasibility of constructing defect-tolerant monolayer graphene membranes for nanofiltration, desalination, and other separation processes.},
doi = {10.1021/acs.nanolett.5b00456},
journal = {Nano Letters},
number = 5,
volume = 15,
place = {United States},
year = {2015},
month = {4}
}

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Works referencing / citing this record:

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