Experimental and theoretical studies on the mechanism for chemical oxidation of multiwalled carbon nanotubes

In this study, the oxidation of multiwalled carbon nanotubes (MWCNTs) sonicated and/or refluxed in acids (H 2 SO 4 /HNO 3 ) was investigated using a combination of high-resolution transmission electron microscopy, Raman spectroscopy, Fourier transform infrared spectroscopy, and ab initio computation...

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Bibliographic Details
Published in:RSC advances 2014-01, Vol.4 (55), p.28826-28831
Main Authors: Maciejewska, B. M., Jasiurkowska-Delaporte, M., Vasylenko, A. I., Kozioł, K. K., Jurga, S.
Format: Article
Language:English
Subjects:
Carboxyl group
Correlation
Fourier transforms
Infrared spectroscopy
Joining
Multi wall carbon nanotubes
Oxidation
Walls
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Summary:In this study, the oxidation of multiwalled carbon nanotubes (MWCNTs) sonicated and/or refluxed in acids (H 2 SO 4 /HNO 3 ) was investigated using a combination of high-resolution transmission electron microscopy, Raman spectroscopy, Fourier transform infrared spectroscopy, and ab initio computational methods. Sonication of the sample has the strongest effect, leading to the highest concentration of defects and carboxyl groups on the walls. Substantial correlations between treatment protocols, CNT size, and the types of chemical moieties are observed. Finally, based on experimental and computational results, we suggest the mechanism of the oxidation process for attaching the functional groups on the sidewalls.
ISSN:2046-2069
2046-2069
DOI:10.1039/C4RA03881A