Purification and structural annealing of multiwalled carbon nanotubes at graphitization temperatures

被引：399
|
作者：
Andrews, R
Jacques, D
Qian, D
Dickey, EC
机构：
[1] Univ Kentucky, Ctr Appl Energy Res, Lexington, KY 40511 USA
[2] Univ Kentucky, Dept Chem & Mat Engn, Lexington, KY 40506 USA
来源：
CARBON | 2001年 / 39卷 / 11期
基金：
美国国家科学基金会;
关键词：
carbon nanotubes; graphitization; X-ray diffraction; transmission electron microscopy (TEM);
D O I：
10.1016/S0008-6223(00)00301-8
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
In this work, we present a systematic study of the effects of graphitization on the structural perfection of multiwalled carbon nanotubes. High purity nanotubes were produced by a low temperature CVD method and subsequently annealed at temperatures between 1600 and 3000 degreesC. The nanotubes were characterized for chemical purity, interlayer spacing, and defect healing. The graphitization procedure was found to remove residual metal catalyst in the nanotubes and reduce the wall defects as reflected in a reduced interlayer spacing between the graphene shells. Graphitization presents a low-cost, commercially viable method of purifying and ordering multiwall carbon nanotubes. (C) 2001 Elsevier Science Ltd. All rights reserved.
引用
收藏
页码：1681 / 1687
页数：7
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