The effects of five commonly used wet chemical oxidations were studied for the extent of oxidation of graphitized nitrogen-doped multiwalled carbon nanotubes (N-MWCNTs). KMnO4/ H2SO4 was the most potent oxidant, as it produced the highest fraction of oxygen-containing functional groups. Electron microscopy studies showed that the treatment of annealed N-MWCNTs (G-N-MWCNTs) with H2SO4/HNO3 and H2SO4/KMnO4 mixtures leads to interesting spiraled ribbon textures. A structural model, involving the stacking of coiled subunits to form a discontinuous carbon nanoribbon rather than a continuous ribbon is proposed to explain the range of textures that result from oxidation as well as from reduction.

Document Type


Publication Date


Notes/Citation Information

Published in Arkivoc, v. 2018, part iv, p. 257 - 275.


Attribution-NonCommercial 4.0 International (CC BY-NC 4.0) https://creativecommons.org/licenses/by-nc/4.0/. Material from ARKIVOC may be stored and used electronically free of charge by any individual or organization but resale of electronically stored material requires permission of the Publisher.

Digital Object Identifier (DOI)


Related Content

The supplementary materials, Figures S1-S8 and Table S1, are available in the online version of the text.

GG-10507UP-1.pdf (1127 kB)
Supplementary Material: Figures S1-S8 and Table S1.