articleScienceFeb 14, 2014GREEN OA

Precise and Ultrafast Molecular Sieving Through Graphene Oxide Membranes

RJRakesh JoshiPCPaola CarboneFWFengchao WangVGVasyl G. KravetsYSYang Su

University of Manchester · University of Science and Technology of China

PubMed
Indexed inarxivcrossrefpubmed

Abstract

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 the dry state but, if immersed in water, act as molecular sieves, blocking all solutes with hydrated radii larger than 4.5 angstroms. Smaller ions permeate through the membranes at rates thousands of times faster than what is expected for simple diffusion. We believe that this behavior is caused by a network of nanocapillaries that open up in the hydrated state and…

Citation impact

2,486
total citations
FWCI
122.11
Percentile
100%
References
55
Citations per year

Authors

9

Topics & keywords

Topics
Keywords
  • Graphene
  • Permeation
  • Oxide
  • Filtration (mathematics)
  • Membrane
  • Micrometer
  • Materials science
  • Chemical engineering
UN Sustainable Development Goals
  • Clean water and sanitation
No related works found for this paper.

Funding