Modifying the sorption properties of multi-walled carbon nanotubes via covalent functionalization

Document Type

Article

Publication Date

1-1-2009

Abstract

We demonstrate that the functionalization of carbon nanotubes dramatically alters their sorption characteristics. The effect of covalent functionalization of multiwalled carbon nanotubes (MWNTs) on the gas phase adsorption and desorption of polar and nonpolar organics is presented. Carboxylation and nitration led to the generation of polar functional groups on the nanotube surface. The derivatized nanotubes showed strong adsorption of polar analytes such as alcohols and relatively weaker adsorption for nonpolar and aromatic compounds. The breakthrough volume of ethanol increased by 300%, where as that of hexane decreased by 75% after functionalization. The functionalized MWNT also showed rapid desorption of the polar as well as nonpolar compounds. © 2009 The Royal Society of Chemistry.

Identifier

70349317394 (Scopus)

Publication Title

Analyst

External Full Text Location

https://doi.org/10.1039/b823316k

e-ISSN

13645528

ISSN

00032654

First Page

1928

Last Page

1933

Issue

9

Volume

134

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