Fast microwave-assisted purification, functionalization and dispersion of multi-walled carbon nanotubes

Document Type

Article

Publication Date

11-1-2008

Abstract

Microwave-assisted purification, chemical functionalization and dispersion of multi-walled carbon nanotubes (MWNTs) are reported. To prevent sidewall functionalization, removal of residual catalyst was carried out using weak, dilute acids and complexing agents. Further covalent derivatization by attaching hydrophilic groups to the sidewall improved aqueous dispersibility to reach 1 mg/mL in deionized water and 0.5 mg/mL in ethanol. Oxidized MWNTs containing -COOH could be used for further functionalization, such as, amidation. The MWNTs were found to be less reactive and had lower solubility than the single-walled carbon nanotubes (SWNTs). Electron microscopy, Fourier Transform Infrared Spectroscopy, Thermogravimetric Analyses and Atomic Absorption spectrometry studies were used to characterize the aimed-MWNTs. Copyright ©2008 American Scientific Publishers. All rights reserved.

Identifier

58149264886 (Scopus)

Publication Title

Journal of Nanoscience and Nanotechnology

External Full Text Location

https://doi.org/10.1166/jnn.2008.215

ISSN

15334880

PubMed ID

19198303

First Page

5770

Last Page

5775

Issue

11

Volume

8

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