Magnetic separation of Fe catalyst from single-walled carbon nanotubes in an aqueous surfactant solution

J. G. Wiltshire; L. J. Li; A. N. Khlobystov; C. J. Padbury; G. A.D. Briggs; R. J. Nicholas

doi:10.1016/j.carbon.2004.12.006

Magnetic separation of Fe catalyst from single-walled carbon nanotubes in an aqueous surfactant solution

J. G. Wiltshire, L. J. Li, A. N. Khlobystov, C. J. Padbury, G. A.D. Briggs, R. J. Nicholas^*

^*Corresponding author for this work

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

26 Scopus citations

Abstract

We report an efficient technique to separate ferromagnetic catalyst particles from an aqueous surfactant solution of single-walled carbon nanotubes (SWNTs) by the use of a 1.3 T permanent magnet. High resolution transmission electron microscopy (HRTEM) demonstrates that SWNTs are coated with a surfactant layer that stabilises the aqueous dispersions of SWNTs. The residual quantities of Fe catalyst (∼3%) can be effectively removed from a colloid solution of SWNTs in a magnetic field while absorbance spectra of the initial and purified solutions show that the nanotube diameter distribution remains unchanged.

Original language	English (US)
Pages (from-to)	1151-1155
Number of pages	5
Journal	Carbon
Volume	43
Issue number	6
DOIs	https://doi.org/10.1016/j.carbon.2004.12.006
State	Published - 2005
Externally published	Yes

Keywords

Carbon nanotubes
Catalyst
Magnetic properties

ASJC Scopus subject areas

General Chemistry
General Materials Science

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10.1016/j.carbon.2004.12.006

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title = "Magnetic separation of Fe catalyst from single-walled carbon nanotubes in an aqueous surfactant solution",

abstract = "We report an efficient technique to separate ferromagnetic catalyst particles from an aqueous surfactant solution of single-walled carbon nanotubes (SWNTs) by the use of a 1.3 T permanent magnet. High resolution transmission electron microscopy (HRTEM) demonstrates that SWNTs are coated with a surfactant layer that stabilises the aqueous dispersions of SWNTs. The residual quantities of Fe catalyst (∼3%) can be effectively removed from a colloid solution of SWNTs in a magnetic field while absorbance spectra of the initial and purified solutions show that the nanotube diameter distribution remains unchanged.",

keywords = "Carbon nanotubes, Catalyst, Magnetic properties",

author = "Wiltshire, {J. G.} and Li, {L. J.} and Khlobystov, {A. N.} and Padbury, {C. J.} and Briggs, {G. A.D.} and Nicholas, {R. J.}",

year = "2005",

doi = "10.1016/j.carbon.2004.12.006",

language = "English (US)",

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pages = "1151--1155",

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T1 - Magnetic separation of Fe catalyst from single-walled carbon nanotubes in an aqueous surfactant solution

AU - Wiltshire, J. G.

AU - Li, L. J.

AU - Khlobystov, A. N.

AU - Padbury, C. J.

AU - Briggs, G. A.D.

AU - Nicholas, R. J.

PY - 2005

Y1 - 2005

N2 - We report an efficient technique to separate ferromagnetic catalyst particles from an aqueous surfactant solution of single-walled carbon nanotubes (SWNTs) by the use of a 1.3 T permanent magnet. High resolution transmission electron microscopy (HRTEM) demonstrates that SWNTs are coated with a surfactant layer that stabilises the aqueous dispersions of SWNTs. The residual quantities of Fe catalyst (∼3%) can be effectively removed from a colloid solution of SWNTs in a magnetic field while absorbance spectra of the initial and purified solutions show that the nanotube diameter distribution remains unchanged.

AB - We report an efficient technique to separate ferromagnetic catalyst particles from an aqueous surfactant solution of single-walled carbon nanotubes (SWNTs) by the use of a 1.3 T permanent magnet. High resolution transmission electron microscopy (HRTEM) demonstrates that SWNTs are coated with a surfactant layer that stabilises the aqueous dispersions of SWNTs. The residual quantities of Fe catalyst (∼3%) can be effectively removed from a colloid solution of SWNTs in a magnetic field while absorbance spectra of the initial and purified solutions show that the nanotube diameter distribution remains unchanged.

KW - Carbon nanotubes

KW - Catalyst

KW - Magnetic properties

UR - http://www.scopus.com/inward/record.url?scp=15844400826&partnerID=8YFLogxK

U2 - 10.1016/j.carbon.2004.12.006

DO - 10.1016/j.carbon.2004.12.006

M3 - Article

AN - SCOPUS:15844400826

SN - 0008-6223

VL - 43

SP - 1151

EP - 1155

JO - Carbon

JF - Carbon

IS - 6

ER -

Magnetic separation of Fe catalyst from single-walled carbon nanotubes in an aqueous surfactant solution

Abstract

Keywords

ASJC Scopus subject areas

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