AI Article Synopsis
- - A new gentle method for purifying multi-wall carbon nanotubes, both nitrogen-doped and undoped, is introduced, focusing on hydrothermal and ultrasonic treatments.
- - The technique avoids harsh oxidation processes that can damage or alter the nanotubes, instead using sequential treatments like extracting polyaromatic compounds and dissolving metal particles.
- - The effectiveness of this purification method is supported by thorough analysis through various imaging and spectroscopic techniques such as SEM, EDAX, and TGA.
Article Abstract
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).
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| http://dx.doi.org/10.1088/0957-4484/19/15/155701 | DOI Listing |
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