A non-damaging purification method: decoupling the toxicity of multi-walled carbon nanotubes and their associated metal impurities - Université de Lorraine Access content directly
Journal Articles Environmental science‎.Nano Year : 2019

A non-damaging purification method: decoupling the toxicity of multi-walled carbon nanotubes and their associated metal impurities

Abstract

Multi walled carbon nanotubes (MWCNTs) are purified by a gas-phase method allowing selective removal of the metallic impurities (Fe and Al catalyst residues) while the MWCNTs remain untouched. Contrary to works using standard purification methods, our approach allows to separately study toxicity due to metallic impurities and that of MWCNTs. Both raw and purified MWCNTs are thoroughly characterized by several techniques including transmission electron microscopy, Raman spectroscopy, thermogravimetric analysis, X-ray photoelectron spectroscopy and adsorption volumetry. The results show that the purification method is efficient and the MWCNT characteristics are well controlled. We study the oxidative stress cell response induced by the MWCNT sample after purification. Cytotoxicity and genotoxicicity are investigated using in vitro micronucleus and comet assays. Our results show that the metallic impurities of the used MWCNTs are not involved in the toxic potential of these CNTs. Consequently, these used CVD-produced MWCNTs alone are responsible for the observed toxic response. This presented approach, applied to other source of CNTs, could be useful for determining the involvement of their metallic impurities in the observed toxic response.
Fichier principal
Vignette du fichier
EnvSci2019_HAL.pdf (950.37 Ko) Télécharger le fichier
Origin : Files produced by the author(s)
Loading...

Dates and versions

hal-02270532 , version 1 (25-08-2019)

Identifiers

Cite

Christian Darne, Alexandre Desforges, Nawal Berrada, Caroline Fontana, Yves Guichard, et al.. A non-damaging purification method: decoupling the toxicity of multi-walled carbon nanotubes and their associated metal impurities. Environmental science‎.Nano, 2019, 6 (6), pp.1852-1865. ⟨10.1039/c8en01276h⟩. ⟨hal-02270532⟩
145 View
165 Download

Altmetric

Share

Gmail Facebook X LinkedIn More