Please use this identifier to cite or link to this item: http://www.repository.rmutt.ac.th/xmlui/handle/123456789/374
Title: Modifying the sorption properties of multi-walled carbon nanotubes via covalent functionalization
Authors: Hussain, Chaudhery Mustansar
Saridara, Chutarat
Mitra, Somenath
Keywords: VOLATILE ORGANIC-COMPOUNDS
GAS-CHROMATOGRAPHY
SIDEWALL FUNCTIONALIZATION
ANALYTICAL SCIENCE
STATIONARY-PHASE
SINGLE
ADSORPTION
MICROTRAP
PRECONCENTRATION
EQUILIBRIUM
Issue Date: 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.
URI: http://www.repository.rmutt.ac.th/dspace/handle/123456789/374
ISSN: 0003-2654
Appears in Collections:บทความ (Article)

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