Adsorption of polar and nonpolar organic chemicals to carbon nanotubes.

Adsorption of polar and nonpolar organic chemicals to carbon nanotubes. Research Abstract Details 

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Adsorption of polar and nonpolar organic chemicals to carbon nanotubes. Abstract Text:

Wei Chen,Lin Duan,Dongqiang Zhu,

Understanding adsorptive interactions between organic contaminants and carbon nanotubes is critical to both the environmental application of carbon nanotubes as special adsorbents and the assessment of the potential impact of carbon nanotubes on the fate and transport of organic contaminants in the environment. The adsorption of organic compounds with varied physical-chemical properties (hydrophobicity, polarity, electron polarizability, and size) to one single-walled carbon nanotube (SWNT) and two multiwalled carbon nanotubes (MWNTs) was evaluated. For a given carbon nanotube, the adsorption affinity correlated poorly with hydrophobicity but increased in the order of nonpolar aliphatic < nonpolar aromatics < nitroaromatics, and within the group of nitroaromatics, the adsorption affinity increased with the number of nitrofunctional groups. We propose that the strong adsorptive interaction between carbon nanotubes and nitroaromatics was due to the pi-pi electron-donor-acceptor (EDA) interaction between nitroaromatic molecules (electron acceptors) and the highly polarizable graphene sheets (electron donors) of carbon nanotubes. Additionally, we attribute the stronger adsorption of nonpolar aromatics compared to that of nonpolar aliphatics to the pi-electron coupling between the flat surfaces of both aromatic molecules and carbon nanotubes. For tetrachlorobenzene, the bulkiest adsorbate, adsorption affinity (on a unit surface area basis) to the SWNT was much stronger than to the two MWNTs, indicating a probable molecular sieving effect.

Adsorption of polar and nonpolar organic chemicals to carbon nanotubes. Publishing Authors By Initials

W Chen,L Duan,D Zhu,

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Adsorption of polar and nonpolar organic chemicals to carbon nanotubes. Journal Published:

PUBLICATION TYPE: Research Support, Non-U.S. Gov

Journal: Environmental science & technology

VOLUME: 41

Page Numbers: 8295-300

Journal Abbreviation: Environ. Sci. Technol.

ISSN: 0013-936X

DAY: 15

MONTH: Dec

YEAR: 2007

Adsorption of polar and nonpolar organic chemicals to carbon nanotubes. Information

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LANGUAGE: eng

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Grant and Affiliation Information for Adsorption of polar and nonpolar organic chemicals to carbon nanotubes.

AFFILIATION: Tianjin Key Laboratory of Environmental Remediation and Pollution Control/College of Environmental Science and Engineering, Nankai University, Tianjin 300071, China.

Country: United States

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MEDLINETA: Environ Sci Technol

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