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Purification of single-walled carbon nanotubes

Published online by Cambridge University Press:  13 April 2011

A. Yaya ,
C. P. Ewels ,
Ph. Wagner ,
I. Suarez-Martinez ,
A. Gebramariam Tekley  and
L. Rosgaard Jensen
A. Yaya
Affiliation:
IMN, CNRS UMR 6502, Université de Nantes, 2 rue de la Houssinière, BP 32229, 44322 Nantes, France
C. P. Ewels*
Affiliation:
IMN, CNRS UMR 6502, Université de Nantes, 2 rue de la Houssinière, BP 32229, 44322 Nantes, France
Ph. Wagner
Affiliation:
IMN, CNRS UMR 6502, Université de Nantes, 2 rue de la Houssinière, BP 32229, 44322 Nantes, France
I. Suarez-Martinez
Affiliation:
Nanochemistry Research Institute, Curtin University of Technology, GPO Box U1987, Perth 6845, Western, Australia
A. Gebramariam Tekley
Affiliation:
Chemistry Department, Science Faculty, Hawassa University, P.O. Box 5, Addis Ababa, Ethiopia
L. Rosgaard Jensen
Affiliation:
Department of Mechanical and Manufacturing Engineering, Aalborg University, Pontoppidanstraede 105, 9220 Aalborg East, Denmark
*
chris.ewels@cnrs-imn.fr
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Abstract

We present a study of purification of single-walled carbon nanotubes (SWCNTs) using different oxidation temperatures and chemical treatments. We have developed a simple two annealing-steps procedure resulting in high nanotube purity with minimal sample loss. The process involves annealing the SWCNTs at 300 °C for 2 h with subsequent reflux in 6 M HCl at 130 °C, followed by further annealing at 350 °C for 1 h with reflux in 6 M HCl at 130 °C. The process results in effective removal of carbon impurities and metal particles which are associated with SWCNTs production. The process is less time consuming (complete in 4.5 h) than conventional acid purification methods which require over 5 h, and less destructive than conventional methods with a yield of 26%. SWCNT purity was assessed using Raman spectroscopy, thermogravimetry and scanning electron microscopy coupled with energy-dispersive X-ray spectroscopy.

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Type
Research Article
Information
The European Physical Journal - Applied Physics , Volume 54 , Issue 1 , April 2011 , 10401
Copyright
© EDP Sciences, 2011

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