Journal article
Monitoring oxidation of multiwalled carbon nanotubes by Raman spectroscopy
Journal of Raman spectroscopy, Vol.38(6), pp.728-736
Jun 2007
Abstract
Multiwalled carbon nanotubes (MWCNTs) were oxidized in air and acids while varying the treatment time and/or temperature. The goal of this approach was to create the highest density of carboxyl groups with moderate sample loss, which is necessary for nanocomposite applications. In situ Raman experiments allowed real‐time observation of the structural changes in MWCNTs upon oxidation. The ratio of the Raman intensities of the D and G bands was used to estimate the concentration of defects. It was found that while an oxidation for 6 h in H2SO4/HNO3 provided the strongest effect, a ‘flash oxidation’ in air (15 min at 550 °C) also leads to an efficient functionalization in a cost‐effective and environmentally friendly way. Transmission electron microscopy, Fourier‐transform infrared (FTIR) spectroscopy, thermogravimetric analysis and electrophoretic mobility analysis were used to study the oxidized nanotubes. Copyright © 2007 John Wiley & Sons, Ltd.
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Details
- Title
- Monitoring oxidation of multiwalled carbon nanotubes by Raman spectroscopy
- Creators
- Sebastian OsswaldMickael HavelYury Gogotsi
- Publication Details
- Journal of Raman spectroscopy, Vol.38(6), pp.728-736
- Publisher
- John Wiley & Sons, Ltd; Chichester, UK
- Number of pages
- 9
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- Materials Science and Engineering
- Identifiers
- 991014877976804721
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