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Title: Nanofiltration across Defect-Sealed Nanoporous Monolayer Graphene

Journal Article · · Nano Letters
 [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

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.

Research Organization:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States). Center for Nanophase Materials Sciences (CNMS)
Sponsoring Organization:
USDOE Office of Science (SC)
Grant/Contract Number:
AC05-00OR22725
OSTI ID:
1265473
Journal Information:
Nano Letters, Vol. 15, Issue 5; ISSN 1530-6984
Publisher:
American Chemical SocietyCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 235 works
Citation information provided by
Web of Science

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Graphene-Based Membrane Technology: Reaching Out to the Oil and Gas Industry journal July 2018
Fundamental transport mechanisms, fabrication and potential applications of nanoporous atomically thin membranes journal June 2017
Recent Developments in Graphene-Based Membranes: Structure, Mass-Transport Mechanism and Potential Applications journal January 2016
2D nanostructures for water purification: graphene and beyond journal January 2016
Exploring the pore charge dependence of K + and Cl permeation across a graphene monolayer: a molecular dynamics study journal January 2019
Outlook for graphene-based desalination membranes journal May 2018
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Voltage gated inter-cation selective ion channels from graphene nanopores journal January 2019
2D nanoporous membrane for cation removal from water: Effects of ionic valence, membrane hydrophobicity, and pore size journal June 2018
Two-Dimensional-Material Membranes: A New Family of High-Performance Separation Membranes journal July 2016
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Dielectric and optical properties of porous graphenes with uniform pore structures journal August 2019
2D materials as an emerging platform for nanopore-based power generation journal July 2019
Spontaneous directional motion of water molecules in single-walled carbon nanotubes with a stiffness gradient journal January 2019
Understanding the role of pore size homogeneity in the water transport through graphene layers journal April 2018
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Nanoporous Atomically Thin Graphene Membranes for Desalting and Dialysis Applications journal June 2017
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Rectification of protein translocation in truncated pyramidal nanopores journal October 2019
State-of-the-Art and Future Prospects for Atomically Thin Membranes from 2D Materials journal August 2018
Applications of nano-porous graphene materials – critical review on performance and challenges journal January 2020
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Current and future directions in electron transfer chemistry of graphene journal January 2017
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