10.1007/s40097-015-0160-3

A study on the dependence of structure of multi-walled carbon nanotubes on acid treatment

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  • S. Sahebian1,
  • S. M. Zebarjad*2,
  • J. vahdati Khaki1,
  • A. Lazzeri3,
  1. Department of Materials Science and Engineering, Engineering Faculty, Ferdowsi University of Mashhad, Mashhad, IR
  2. Department of Materials Science and Engineering, Engineering Faculty, Shiraz University, Shiraz, IR
  3. Department of Chemical Engineering, University of Pisa, Pisa, 56126, IT
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Published in Issue 29-06-2015

How to Cite

Sahebian, S., Zebarjad, S. M., vahdati Khaki, J., & Lazzeri, A. (2015). A study on the dependence of structure of multi-walled carbon nanotubes on acid treatment. Journal of Nanostructure in Chemistry, 5(3 (September 2015). https://doi.org/10.1007/s40097-015-0160-3
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Abstract

Abstract In the current research, the role of both concentrated nitric acid and ultrasound waves on oxidation of multi-walled carbon nanotubes (MWNTs) was studied. The functionalized MWCNTs were characterized by transmission electron microscopy (TEM), thermogravimetric analyzer, and Fourier transform infrared spectroscopy (FTIR) techniques. It was found that desirable modifications to MWNTs occurred after acid treatment. Carboxylic acid groups were appeared on the side surfaces of MWNTs. FTIR presented the formation of oxygen-containing groups such as C=O and COOH after modification by concentrated nitric acid. The TEM images showed that the aspect ratio of opened MWCNTs was controlled by both ultrasonic waves and acid treatment time. It was also found that the exposure of about 4 h in nitric acid led to the highest removal of the impurities with the least destructive effect.

Keywords

  • Multi-walled carbon nanotube,
  • Structure,
  • Acid treatment,
  • Ultrasonic waves
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