Journal of Materials Science and Engineering with Advanced TechnologyAuthor's: B. Boussouari and M. Baitoul
Pages: [1] - [15]
Received Date: November 9, 2012
Submitted by:
The purpose of the present work was to purify multi-walled carbon
nanotubes (MWCNTs) produced by CVD using hydrochloric acid (HCl) and
nitric acid 
in order to remove the metal catalyst
particles and amorphous carbon. The effect of acid treatment and
sonication on the MWCNTs structure was obtained by X-ray diffraction
(XRD), thermogravimetric analysis (TGA), environmental scanning
electronic microscopy (ESEM), and Raman spectroscopy. Comparing the
acid treatment in HCl solution with that in 
solution, the results showed better
purification and exfoliation of the MWCNTs treated in at optimized sonication time. However,
higher thermal stability of the HCl acid purified MWCNTs was obtained.
carbon nanotubes, purification, acid treatment, morphology, vibrational spectroscopy, thermal analysis.
