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Facile Size-Selective Defect Sealing in Large-Area Atomically Thin Graphene Membranes for Sub-Nanometer Scale Separations

Journal Article · · Nano Letters

Atomically thin graphene with a high-density of precise subnanometer pores represents the ideal membrane for ionic and molecular separations. However, a single large-nanopore can severely compromise membrane performance and differential etching between pre-existing defects/grain boundaries in graphene and pristine regions presents fundamental limitations. Here, we show for the first time that size-selective interfacial polymerization after high-density nanopore formation in graphene not only seals larger defects (>0.5 nm) and macroscopic tears but also successfully preserves the smaller subnanometer pores. Low-temperature growth followed by mild UV/ozone oxidation allows for facile and scalable formation of high-density (4–5.5 $$\times$$ 1012 cm–2) useful subnanometer pores in the graphene lattice. We demonstrate scalable synthesis of fully functional centimeter-scale nanoporous atomically thin membranes (NATMs) with water (~0.28 nm) permeance ~23$$\times$$ higher than commercially available membranes and excellent rejection to salt ions (~0.66 nm, >97% rejection) as well as small organic molecules (~0.7–1.5 nm, ~100% rejection) under forward osmosis. $$\times$$

Research Organization:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States). Center for Nanophase Materials Science (CNMS)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES); ACS Petroleum Research Fund (ACS PRF); National Science Foundation (NSF)
Grant/Contract Number:
AC05-00OR22725
OSTI ID:
1761634
Journal Information:
Nano Letters, Journal Name: Nano Letters Journal Issue: 8 Vol. 20; ISSN 1530-6984
Publisher:
American Chemical SocietyCopyright Statement
Country of Publication:
United States
Language:
English

References (50)

Facile Fabrication of Freestanding Ultrathin Reduced Graphene Oxide Membranes for Water Purification journal November 2014
Selective Nanoscale Mass Transport across Atomically Thin Single Crystalline Graphene Membranes journal March 2017
Nanoporous Atomically Thin Graphene Membranes for Desalting and Dialysis Applications journal June 2017
State-of-the-Art and Future Prospects for Atomically Thin Membranes from 2D Materials journal August 2018
Facile Fabrication of Large-Area Atomically Thin Membranes by Direct Synthesis of Graphene with Nanoscale Porosity journal October 2018
Quantifying ion-induced defects and Raman relaxation length in graphene journal April 2010
A new commercial thin film composite membrane for forward osmosis journal June 2014
Preparation and water desalination properties of POSS-polyamide nanocomposite reverse osmosis membranes journal January 2015
Desalination by forward osmosis: Identifying performance limiting parameters through module-scale modeling journal October 2015
Nanofiltration across Defect-Sealed Nanoporous Monolayer Graphene journal April 2015
Single-Layer Graphene Membranes Withstand Ultrahigh Applied Pressure journal April 2017
A Scalable Route to Nanoporous Large-Area Atomically Thin Graphene Membranes by Roll-to-Roll Chemical Vapor Deposition and Polymer Support Casting journal March 2018
Molecular Sieving Across Centimeter-Scale Single-Layer Nanoporous Graphene Membranes journal May 2017
Water and Solute Transport Governed by Tunable Pore Size Distributions in Nanoporous Graphene Membranes journal October 2017
Desalination and Nanofiltration through Functionalized Laminar MoS 2 Membranes journal October 2017
The Parameter Space of Graphene Chemical Vapor Deposition on Polycrystalline Cu journal October 2012
DNA Translocation through Graphene Nanopores journal August 2010
Ethylene Irradiation: A New Route to Grow Graphene on Low Reactivity Metals journal September 2011
Quantifying Defects in Graphene via Raman Spectroscopy at Different Excitation Energies journal July 2011
Water Desalination across Nanoporous Graphene journal June 2012
Assessing Graphene Nanopores for Sequencing DNA journal July 2012
Observing Graphene Grow: Catalyst–Graphene Interactions during Scalable Graphene Growth on Polycrystalline Copper journal September 2013
Selective Ionic Transport through Tunable Subnanometer Pores in Single-Layer Graphene Membranes journal February 2014
Mechanical Strength of Nanoporous Graphene as a Desalination Membrane journal October 2014
Impermeable Atomic Membranes from Graphene Sheets journal August 2008
Selective Molecular Transport through Intrinsic Defects in a Single Layer of CVD Graphene journal October 2012
Materials for next-generation desalination and water purification membranes journal April 2016
Graphene as a subnanometre trans-electrode membrane journal August 2010
Ion sieving in graphene oxide membranes via cationic control of interlayer spacing journal October 2017
Ion selectivity of graphene nanopores journal April 2016
Selective molecular sieving through porous graphene journal October 2012
Raman spectroscopy as a versatile tool for studying the properties of graphene journal April 2013
Molecular valves for controlling gas phase transport made from discrete ångström-sized pores in graphene journal August 2015
Water desalination using nanoporous single-layer graphene journal March 2015
Tunable sieving of ions using graphene oxide membranes journal April 2017
Fundamental transport mechanisms, fabrication and potential applications of nanoporous atomically thin membranes journal June 2017
Single-layer graphene membranes by crack-free transfer for gas mixture separation journal July 2018
Enhanced sieving from exfoliated MoS2 membranes via covalent functionalization journal August 2019
Fabrication of Subnanometer-Precision Nanopores in Hexagonal Boron Nitride journal November 2017
Quantifying the potential of ultra-permeable membranes for water desalination journal January 2014
Visualization and characterization of interfacial polymerization layer formation journal January 2015
Assessment and control of the impermeability of graphene for atomically thin membranes and barriers journal January 2017
High-permeance polymer-functionalized single-layer graphene membranes that surpass the postcombustion carbon capture target journal January 2019
Ultra-thin hybrid polyhedral silsesquioxane–polyamide films with potentially unlimited 2D dimensions journal January 2012
Molecular and continuum hydrodynamics in graphene nanopores journal January 2013
Atom-by-atom nucleation and growth of graphene nanopores journal April 2012
Point Defects on Graphene on Metals journal September 2011
Etching gas-sieving nanopores in single-layer graphene with an angstrom precision for high-performance gas mixture separation journal January 2019
Ultimate Permeation Across Atomically Thin Porous Graphene journal April 2014
Large-area graphene-nanomesh/carbon-nanotube hybrid membranes for ionic and molecular nanofiltration journal June 2019