Author'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.