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

被引：52
作者：
Hussain, Chaudhery Mustansar [2 ]
Saridara, Chutarat [2 ,3 ]
Mitra, Somenath [1 ]
机构：
[1] New Jersey Inst Technol, Dept Chem & Environm Sci, Newark, NJ 07102 USA
[2] Chulalongkorn Univ, Natl Ctr Excellence Environm & Hazardous Waste Ma, Bangkok 10330, Thailand
[3] Rajamangala Univ Technol, Fac Sci & Technol, Dept Chem, Thanyaburi, Thailand
来源：
ANALYST | 2009年 / 134卷 / 09期
关键词：
VOLATILE ORGANIC-COMPOUNDS; GAS-CHROMATOGRAPHY; SINGLE; ADSORPTION; MICROTRAP; PRECONCENTRATION; EQUILIBRIUM; THERMODYNAMICS; POLLUTANTS; MEMBRANE;
D O I：
10.1039/b823316k
中图分类号：
O65 [分析化学];
学科分类号：
070302 ; 081704 ;
摘要：
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.
引用
收藏
页码：1928 / 1933
页数：6
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