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Issue 3, 2008
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Hydrothermal treatment to prepare hydroxyl group modified multi-walled carbon nanotubes

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Abstract

Multi-walled carbon nanotubes (MWNTs) bearing hydroxyl groups (MWNTols) on the exterior surface have been synthesized by an alkaline-mediated hydrothermal treatment of MWNTs under autogenous pressure at 180 °C. X-Ray photoelectron spectroscopy shows that the content of hydroxyl groups increases with the concentration of sodium hydroxide utilized. FT-IR spectroscopy shows that hemiketals were incorporated into the structure of MWNTols. The prepared MWNTols are highly soluble in polar solvents such as water, methanol, butanone and tetrahydrofuran, to give robust stable black solutions. Transmission electron microscopy reveals that the diameter, length and morphology of MWNTs are well retained in MWNTols. MWNTols are redox active on their exterior surface, where hydroxyl groups, upon reaction with Ce(IV) ions, transform to radical species and initiate polymerization of N-isopropylacrylamide (NIPAM).

Graphical abstract: Hydrothermal treatment to prepare hydroxyl group modified multi-walled carbon nanotubes

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Article information


Submitted
03 Sep 2007
Accepted
06 Nov 2007
First published
22 Nov 2007

J. Mater. Chem., 2008,18, 350-354
Article type
Paper

Hydrothermal treatment to prepare hydroxyl group modified multi-walled carbon nanotubes

D. Yang, G. Guo, J. Hu, C. Wang and D. Jiang, J. Mater. Chem., 2008, 18, 350
DOI: 10.1039/B713467C

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