Purification of laser synthesized SWCNTs by different methods: A comparative study

Letlhogonolo Matlhoko; Sreejarani K. Pillai; Suprakas Sinha Ray; Willem G. Augustyn; Mathew Moodley

doi:10.1166/jnn.2008.484

Purification of laser synthesized SWCNTs by different methods: A comparative study

Letlhogonolo Matlhoko, Sreejarani K. Pillai, Suprakas Sinha Ray, Willem G. Augustyn, Mathew Moodley

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

2 Citations (Scopus)

Abstract

A comparison of different purification procedures for single walled carbon nanotubes (SWCNTs) synthesized by laser-vapourization has been presented. The methods involved gas-phase oxidation by calcination, liquid-phase oxidation by H ₂O ₂, hydrothermal treatment and acid refluxing in HCl. Sample purity is documented with Raman spectroscopy, Transmission electron microscopy, Scanning electron microscopy and thermogravimetric analysis. Multi-spot analyses were done to check the homogeneity of the purified samples. Different purification processes produced SWCNT material with purity in the range of 48-78%. Raman and TEM results suggested that prolonged calcination results in selective etching of larger diameter nanotubes. SEM and TGA analyses showed increase in density of SWCNTs with better oxidation resistance after purification.

Original language	English
Pages (from-to)	6023-6030
Number of pages	8
Journal	Journal of Nanoscience and Nanotechnology
Volume	8
Issue number	11
DOIs	https://doi.org/10.1166/jnn.2008.484
Publication status	Published - Nov 2008
Externally published	Yes

Keywords

Purification processes
Selective oxidation
SWCNTS

ASJC Scopus subject areas

Bioengineering
General Chemistry
Biomedical Engineering
General Materials Science
Condensed Matter Physics

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10.1166/jnn.2008.484

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title = "Purification of laser synthesized SWCNTs by different methods: A comparative study",

abstract = "A comparison of different purification procedures for single walled carbon nanotubes (SWCNTs) synthesized by laser-vapourization has been presented. The methods involved gas-phase oxidation by calcination, liquid-phase oxidation by H 2O 2, hydrothermal treatment and acid refluxing in HCl. Sample purity is documented with Raman spectroscopy, Transmission electron microscopy, Scanning electron microscopy and thermogravimetric analysis. Multi-spot analyses were done to check the homogeneity of the purified samples. Different purification processes produced SWCNT material with purity in the range of 48-78%. Raman and TEM results suggested that prolonged calcination results in selective etching of larger diameter nanotubes. SEM and TGA analyses showed increase in density of SWCNTs with better oxidation resistance after purification.",

keywords = "Purification processes, Selective oxidation, SWCNTS",

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year = "2008",

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T2 - A comparative study

AU - Matlhoko, Letlhogonolo

AU - Pillai, Sreejarani K.

AU - Ray, Suprakas Sinha

AU - Augustyn, Willem G.

AU - Moodley, Mathew

PY - 2008/11

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N2 - A comparison of different purification procedures for single walled carbon nanotubes (SWCNTs) synthesized by laser-vapourization has been presented. The methods involved gas-phase oxidation by calcination, liquid-phase oxidation by H 2O 2, hydrothermal treatment and acid refluxing in HCl. Sample purity is documented with Raman spectroscopy, Transmission electron microscopy, Scanning electron microscopy and thermogravimetric analysis. Multi-spot analyses were done to check the homogeneity of the purified samples. Different purification processes produced SWCNT material with purity in the range of 48-78%. Raman and TEM results suggested that prolonged calcination results in selective etching of larger diameter nanotubes. SEM and TGA analyses showed increase in density of SWCNTs with better oxidation resistance after purification.

AB - A comparison of different purification procedures for single walled carbon nanotubes (SWCNTs) synthesized by laser-vapourization has been presented. The methods involved gas-phase oxidation by calcination, liquid-phase oxidation by H 2O 2, hydrothermal treatment and acid refluxing in HCl. Sample purity is documented with Raman spectroscopy, Transmission electron microscopy, Scanning electron microscopy and thermogravimetric analysis. Multi-spot analyses were done to check the homogeneity of the purified samples. Different purification processes produced SWCNT material with purity in the range of 48-78%. Raman and TEM results suggested that prolonged calcination results in selective etching of larger diameter nanotubes. SEM and TGA analyses showed increase in density of SWCNTs with better oxidation resistance after purification.

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Purification of laser synthesized SWCNTs by different methods: A comparative study

Abstract

Keywords

ASJC Scopus subject areas

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