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Hydrogenation, Purification, and Unzipping of Carbon Nanotubes by Reaction with Molecular Hydrogen: Road to Graphane Nanoribbons
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2011 (English)In: ACS Nano, ISSN 1936-0851, Vol. 5, no 6, 5132-5140 p.Article in journal (Refereed) Published
Abstract [en]

Reaction of single-walled carbon nanotubes (SWNTs) with hydrogen gas was studied in a temperature interval of 400-550 degrees C and at hydrogen pressure of 50 bar. Hydrogenation of nanotubes was observed for samples treated at 400-450 degrees C with about 1/3 of carbon atoms forming covalent C-H bonds, whereas hydrogen treatment at higher temperatures (550 degrees C) occurs as an etching. Unzipping of some SWNTs Into graphene nanoribbons is observed as a result of hydrogenation at 400-550 degrees C Annealing in hydrogen gas at elevated conditions for prolonged periods of time (72 h) is demonstrated to result also in nanotube opening, purification of nanotubes from amorphous carbon, and removal of carbon coatings from Fe catalyst particles, which allows their complete elimination by acid treatment.

Place, publisher, year, edition, pages
2011. Vol. 5, no 6, 5132-5140 p.
Keyword [en]
carbon nanotube, SWNT, hydrogen, graphene, graphane
National Category
Chemical Sciences
URN: urn:nbn:se:su:diva-67882DOI: 10.1021/nn201224kISI: 000292055200103OAI: diva2:471236
authorCount :10Available from: 2012-01-02 Created: 2012-01-02 Last updated: 2012-01-02Bibliographically approved

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Noréus, Dag
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Department of Materials and Environmental Chemistry (MMK)
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