A comparison of purification procedures for multi-walled carbon nanotubes produced by chemical vapour deposition

Letlhogonolo Matlhoko; Ejarani K. SrePillai; Mathew Moodley; Willem G. Augustyn; Suprakas Sinha Ray

doi:10.1166/jnn.2009.1108

A comparison of purification procedures for multi-walled carbon nanotubes produced by chemical vapour deposition

Letlhogonolo Matlhoko, Ejarani K. SrePillai, Mathew Moodley, Willem G. Augustyn, Suprakas Sinha Ray

Research output: Contribution to journal › Article › peer-review

8 Citations (Scopus)

Abstract

A comparison of three different purification procedures for multi-walled carbon nanotubes (MWC- NTs) produced by chemical vapour deposition (CVD) has been presented. The methods involved gas-phase oxidation by calcination, liquid-phase oxidation by H ₂O ₂, hydrothermal treatment and acid refluxing in HCI. Sample purity was documented with the Raman spectroscopy, Transmission electron microscopy (TEM), Scanning electron microscopy (SEM) and thermo gravimetric analysis (TGA). The Raman spectroscopy, SEM and TEM results showed that the liquid phase oxidationacid refluxing route successfully eliminated most of the impurities without damaging the nanotube structure. TGA analysis showed in increase in density of MWCNTs with better oxidation resistance after purification and the metal content was reduced from 23.8 wt% to 5.4 wt%.

Original language	English
Pages (from-to)	5431-5435
Number of pages	5
Journal	Journal of Nanoscience and Nanotechnology
Volume	9
Issue number	9
DOIs	https://doi.org/10.1166/jnn.2009.1108
Publication status	Published - Sept 2009
Externally published	Yes

Keywords

Chemical vapour deposition
Comparison
Multi-walled carbon nanotubes
Purification procedures

ASJC Scopus subject areas

Bioengineering
General Chemistry
Biomedical Engineering
General Materials Science
Condensed Matter Physics

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10.1166/jnn.2009.1108

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abstract = "A comparison of three different purification procedures for multi-walled carbon nanotubes (MWC- NTs) produced by chemical vapour deposition (CVD) has been presented. The methods involved gas-phase oxidation by calcination, liquid-phase oxidation by H 2O 2, hydrothermal treatment and acid refluxing in HCI. Sample purity was documented with the Raman spectroscopy, Transmission electron microscopy (TEM), Scanning electron microscopy (SEM) and thermo gravimetric analysis (TGA). The Raman spectroscopy, SEM and TEM results showed that the liquid phase oxidationacid refluxing route successfully eliminated most of the impurities without damaging the nanotube structure. TGA analysis showed in increase in density of MWCNTs with better oxidation resistance after purification and the metal content was reduced from 23.8 wt% to 5.4 wt%.",

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AU - Moodley, Mathew

AU - Augustyn, Willem G.

AU - Ray, Suprakas Sinha

PY - 2009/9

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A comparison of purification procedures for multi-walled carbon nanotubes produced by chemical vapour deposition

Abstract

Keywords

ASJC Scopus subject areas

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