Purification and structural annealing of multiwalled carbon nanotubes at graphitization temperatures
Purification and structural annealing of multiwalled carbon nanotubes at graphitization temperatures
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DOI：
10.1016/s0008-6223(00)00301-8
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发表时间：
2001-01-01
期刊：
影响因子：
10.9
通讯作者：
Dickey, EC
中科院分区：
文献类型：
--
作者：
Andrews, R;Jacques, D;Dickey, EC
在这项工作中，我们系统地研究了石墨化对多壁碳纳米管结构完善的影响。高纯度纳米管是通过低温 CVD 方法生产的，随后在 1600 至 3000 摄氏度之间的温度下进行退火。对纳米管的化学纯度、层间距和缺陷修复进行了表征。发现石墨化过程可以去除纳米管中残留的金属催化剂并减少壁缺陷，这反映在石墨烯壳之间的层间距减小上。石墨化提供了一种低成本、商业上可行的纯化和排序多壁碳纳米管的方法。 (C) 2001 Elsevier Science Ltd. 保留所有权利。
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.