Precise and Ultrafast Molecular Sieving Through Graphene Oxide Membranes

@article{Joshi2014PreciseAU,
  title={Precise and Ultrafast Molecular Sieving Through Graphene Oxide Membranes},
  author={Rakesh K. Joshi and Paola Carbone and F C Wang and Vasyl G. Kravets and Y Su and Irina V. Grigorieva and H. A. Wu and SUPARNA DUTTASINHA and Rahul R. Nair},
  journal={Science},
  year={2014},
  volume={343},
  pages={752 - 754}
}
Graphene oxide membranes allow only very small hydrated molecules and ions to pass with an accelerated transport rate. [Also see Perspective by Mi] Graphene-based materials can have well-defined nanometer pores and can exhibit low frictional water flow inside them, making their properties of interest for filtration and separation. We investigate permeation through micrometer-thick laminates prepared by means of vacuum filtration of graphene oxide suspensions. The laminates are vacuum-tight in… 

Graphene Oxide Membranes for Ionic and Molecular Sieving

  • B. Mi
  • Engineering
    Science
  • 2014
It is reported that ions smaller in size than the GO nanochannel can permeate in the GO membrane at a speed orders of magnitude faster than would occur through simple diffusion.

Ultrathin graphene-based membrane with precise molecular sieving and ultrafast solvent permeation.

Efficient and fast filtration of organic solutions through GO laminates containing smooth two-dimensional capillaries made from large (10-20 μm) flakes is reported, which significantly expands possibilities for the use of GO membranes in purification and filTration technologies.

Tunable sieving of ions using graphene oxide membranes.

A simple scalable method is demonstrated to obtain graphene-based membranes with limited swelling, which exhibit 97% rejection for NaCl and decrease exponentially with decreasing sieve size, but water transport is weakly affected.

Ultrafast, Stable Ionic and Molecular Sieving through Functionalized Boron Nitride Membranes.

It is shown that the nanometer-thick membrane prepared by means of filtration of functionalized boron nitride (FBN) water suspensions can block solutes with hydrated radii larger than 4.3 angstroms (Å) in water.

Graphene-based membranes for organic solvent nanofiltration

Different from the conventional polymeric separation membranes having a wide flexible-pore size distribution, layered graphene-based films with interconnected nanochannels provide narrowly

Water/Alcohol Separation in Graphene Oxide Membranes: Insights from Molecular Dynamics and Monte Carlo Simulations

Graphene-based membranes have been investigated as promising candidates for water filtration and gas separation applications. Experimental evidences have shown that graphene oxide can be impermeable

Tunable Ion Sieving of Graphene Membranes through the Control of Nitrogen-Bonding Configuration.

Novel nitrogen-doped graphene (NG) membranes for use in tunable ion sieving that are made via facile fabrication by a time-dependent N-doping technique are proposed.

Ion sieving in graphene oxide membranes via cationic control of interlayer spacing

Here, cationic control of the interlayer spacing of graphene oxide membranes with ångström precision is demonstrated using K+, Na+, Ca2+, Li+ or Mg2+ ions, suggesting that other ions could be used to produce a wider range of interlayer spacings.
...

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  • Meng HuB. Mi
  • Engineering
    Environmental science & technology
  • 2013
It is emphasized that the facile synthesis of a GO membrane exploiting the ideal properties of inexpensive GO materials offers a myriad of opportunities to modify its physicochemical properties, potentially making the GO membrane a next-generation, cost-effective, and sustainable alternative to the long-existing thin-film composite polyamide membranes for water separation applications.

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