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Obtaining carbon nanotubes from grass

Zhenhui Kang1, Enbo Wang1, Baodong Mao1, Zhongmin Su2, Lei Chen1 and Lin Xu1

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Multi-walled carbon nanotubes (MCNTs) can be obtained by heating grass in the presence of a suitable amount of oxygen. Grass contains a large amount of vascular bundles in the stem and nervation. The major compositions of them are cellulose, hemicellulose and lignin. In the present approach, a rapid heat treatment (at about 600 °C) and the participation of oxygen make the vascular bundles become dehydrated and turn into carbon nanotubes. The diameters of the carbon nanotubes obtained are between 30 and 50 nm.


PACS

61.46.Fg Nanotubes

81.40.Gh Other heat and thermomechanical treatments

Subjects

Condensed matter: structural, mechanical & thermal

Nanoscale science and low-D systems

Dates

Issue 8 (August 2005)

Received 14 November 2004, in final form 19 April 2005

Published 20 May 2005



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