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Enhanced purification of carbon nanotubes by microwave and chlorine cleaning procedures

Virginia Gomez Orcid Logo, Silvia Irusta, Olawale B. Lawal, Wade Adams, Robert H. Hauge, Charlie Dunnill Orcid Logo, Andrew Barron

RSC Advances, Volume: 6, Issue: 14, Pages: 11895 - 11902

Swansea University Authors: Virginia Gomez Orcid Logo, Charlie Dunnill Orcid Logo, Andrew Barron

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DOI (Published version): 10.1039/C5RA24854J

Abstract

We report a new two-step purification method of carbon nanotubes (CNTs) involving a microwave treatment followed by a gas-phase chlorination process. The significant advantage of this method over conventional cleaning carbon nanotubes procedures is that under microwave treatment in air, the carbon s...

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Published in: RSC Advances
ISSN: 2046-2069 2046-2069
Published: 2016
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URI: https://cronfa.swan.ac.uk/Record/cronfa28912
first_indexed 2016-06-15T18:23:43Z
last_indexed 2023-01-11T14:01:40Z
id cronfa28912
recordtype SURis
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spelling 2022-12-06T15:52:05.3104692 v2 28912 2016-06-15 Enhanced purification of carbon nanotubes by microwave and chlorine cleaning procedures 2b0a7a13d79d306b3e0be7d30df54844 0000-0002-7846-9066 Virginia Gomez Virginia Gomez true false 0c4af8958eda0d2e914a5edc3210cd9e 0000-0003-4052-6931 Charlie Dunnill Charlie Dunnill true false 92e452f20936d688d36f91c78574241d Andrew Barron Andrew Barron true false 2016-06-15 We report a new two-step purification method of carbon nanotubes (CNTs) involving a microwave treatment followed by a gas-phase chlorination process. The significant advantage of this method over conventional cleaning carbon nanotubes procedures is that under microwave treatment in air, the carbon shells that encase the residual metal catalyst particles are removed and the metallic iron is exposed and subsequently oxidized making it available for chemical removal. The products from microwave and chlorine treatment have been characterized. The oxidation state of the iron is observed to change from Fe(0) to Fe(II)/Fe(III) after microwave treatment and atmospheric exposure. The effects of the duration and number of microwave exposures has been investigated. This rapid and effective microwave step favors the subsequent chlorination treatment enabling a more effective cleaning procedure to take place, yielding higher purity single- and multi-walled CNTs. Journal Article RSC Advances 6 14 11895 11902 2046-2069 2046-2069 31 12 2016 2016-12-31 10.1039/C5RA24854J COLLEGE NANME COLLEGE CODE Swansea University 2022-12-06T15:52:05.3104692 2016-06-15T15:09:49.5521360 Faculty of Science and Engineering School of Engineering and Applied Sciences - Chemical Engineering Virginia Gomez 0000-0002-7846-9066 1 Silvia Irusta 2 Olawale B. Lawal 3 Wade Adams 4 Robert H. Hauge 5 Charlie Dunnill 0000-0003-4052-6931 6 Andrew Barron 7 28912__15748__08250e55702e452b896ff15ff537e2cd.pdf gomez2016.pdf 2019-10-29T11:51:14.8895644 Output 17668861 application/pdf Accepted Manuscript true false
title Enhanced purification of carbon nanotubes by microwave and chlorine cleaning procedures
spellingShingle Enhanced purification of carbon nanotubes by microwave and chlorine cleaning procedures
Virginia Gomez
Charlie Dunnill
Andrew Barron
title_short Enhanced purification of carbon nanotubes by microwave and chlorine cleaning procedures
title_full Enhanced purification of carbon nanotubes by microwave and chlorine cleaning procedures
title_fullStr Enhanced purification of carbon nanotubes by microwave and chlorine cleaning procedures
title_full_unstemmed Enhanced purification of carbon nanotubes by microwave and chlorine cleaning procedures
title_sort Enhanced purification of carbon nanotubes by microwave and chlorine cleaning procedures
author_id_str_mv 2b0a7a13d79d306b3e0be7d30df54844
0c4af8958eda0d2e914a5edc3210cd9e
92e452f20936d688d36f91c78574241d
author_id_fullname_str_mv 2b0a7a13d79d306b3e0be7d30df54844_***_Virginia Gomez
0c4af8958eda0d2e914a5edc3210cd9e_***_Charlie Dunnill
92e452f20936d688d36f91c78574241d_***_Andrew Barron
author Virginia Gomez
Charlie Dunnill
Andrew Barron
author2 Virginia Gomez
Silvia Irusta
Olawale B. Lawal
Wade Adams
Robert H. Hauge
Charlie Dunnill
Andrew Barron
format Journal article
container_title RSC Advances
container_volume 6
container_issue 14
container_start_page 11895
publishDate 2016
institution Swansea University
issn 2046-2069
2046-2069
doi_str_mv 10.1039/C5RA24854J
college_str Faculty of Science and Engineering
hierarchytype
hierarchy_top_id facultyofscienceandengineering
hierarchy_top_title Faculty of Science and Engineering
hierarchy_parent_id facultyofscienceandengineering
hierarchy_parent_title Faculty of Science and Engineering
department_str School of Engineering and Applied Sciences - Chemical Engineering{{{_:::_}}}Faculty of Science and Engineering{{{_:::_}}}School of Engineering and Applied Sciences - Chemical Engineering
document_store_str 1
active_str 0
description We report a new two-step purification method of carbon nanotubes (CNTs) involving a microwave treatment followed by a gas-phase chlorination process. The significant advantage of this method over conventional cleaning carbon nanotubes procedures is that under microwave treatment in air, the carbon shells that encase the residual metal catalyst particles are removed and the metallic iron is exposed and subsequently oxidized making it available for chemical removal. The products from microwave and chlorine treatment have been characterized. The oxidation state of the iron is observed to change from Fe(0) to Fe(II)/Fe(III) after microwave treatment and atmospheric exposure. The effects of the duration and number of microwave exposures has been investigated. This rapid and effective microwave step favors the subsequent chlorination treatment enabling a more effective cleaning procedure to take place, yielding higher purity single- and multi-walled CNTs.
published_date 2016-12-31T08:10:57Z
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