Soft purification of N-doped and undoped multi-wall carbon nanotubes

Edgar Rogelio Alvizo-Paez, Jose Manuel Romo-Herrera, Humberto Terrones, Mauricio Terrones, Jaime Ruiz-Garcia, Jose Luis Hernandez-Lopez

Research output: Contribution to journalArticlepeer-review

8 Scopus citations


A soft method for purifying multi-wall carbon nanotubes (N-doped and undoped) is presented. The technique includes a hydrothermal/ultrasonic treatment of the material in conjunction with other subsequent treatments, including the extraction of polyaromatic compounds, dissolution of metal particles, bundle exfoliation, and uniform dispersion. This method avoids harsh oxidation protocols that burn (via thermal treatments) or functionalize (by introducing chemical groups) the nanotubes. We show a careful analysis of each purification step and demonstrate that the technique is extremely efficient when characterizing the materials using scanning electron microscopy (SEM), energy dispersive x-ray analysis (EDAX), scanning tuneling electron microscopy (STEM), x-ray powder diffraction (XRD), diffuse reflectance Fourier transform infrared (DRFTIR) spectroscopy and thermogravimetric analysis (TGA).

Original languageEnglish (US)
Article number155701
Issue number15
StatePublished - Apr 16 2008

All Science Journal Classification (ASJC) codes

  • Bioengineering
  • General Chemistry
  • General Materials Science
  • Mechanics of Materials
  • Mechanical Engineering
  • Electrical and Electronic Engineering


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