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Mechanisms of selective ion transport and salt rejection in carbon nanostructures

Published online by Cambridge University Press:  12 April 2017

Ben Corry
Ben Corry*
Affiliation:
Research School of Biology, The Australian National University, Australia; [email protected]
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Abstract

Carbon nanostructures, especially carbon nanotubes and graphene nanopores, have been suggested for use in a wide range of purification and separation applications, from the desalination of seawater to the separation of liquids and gases. However, achieving the required high degree of selectivity among the molecules passing through the pores while maintaining rapid transport is a difficult challenge. Here, we examine the physical mechanisms by which nanopores distinguish between small ions and reject salts while passing water, as examples of how selectivity and purification can be achieved. The simple principles described can be utilized to design novel nanoporous materials for the separation of a wide range of gases, liquids, and solutes.

Keywords

purificationwatersimulationfluidicsnanostructure
Type
Research Article
Information
MRS Bulletin , Volume 42 , Issue 4: Materials Enabling Nanofluidic Flow Enhancement , April 2017 , pp. 306 - 310
Copyright
Copyright © Materials Research Society 2017 

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