Purification of multiwalled carbon nanotubes by annealing and extraction based on the difference in van der Waals potential

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	Purification of multiwalled carbon nanotubes by annealing and extraction based on the difference in van der Waals potential
	H. Zhang; C. H. Sun; F. Li; H. X. Li; H. M. Cheng
	2006
发表期刊	Journal of Physical Chemistry B
ISSN	1520-6106
卷号	110 期号:19 页码:9477-9481
摘要	The potential energies of van der Waals interactions between two multiwalled carbon nanotubes (MWNTs) as well as two carbon nanoparticles (CNPs) were calculated and compared on the basis of the continuum Lennard-Jones model. The well depth of the potential is 1 order of magnitude higher for MWNTs than for CNPs, indicating that MWNTs and CNPs can be separated from each other through polymer-induced steric stabilization. On the basis of this prediction, a novel method for the purification of MWNTs was proposed. The method involves a high-temperature annealing ( 2600 degrees C, 1 h) followed by an extraction treatment with a selected dispersing agent. While the annealing process evaporates the metal particles, the extraction treatment removes CNPs. The quality of the nanotubes obtained after purification was examined by laser Raman, thermogravimetric analysis, and electron microscopy observations.
部门归属	chinese acad sci, inst met res, shenyang natl lab mat sci, shenyang 110016, peoples r china.;cheng, hm (reprint author), chinese acad sci, inst met res, shenyang natl lab mat sci, 72 wenhua rd, shenyang 110016, peoples r china;cheng@imr.ac.cn
关键词	Decomposition Hydrocarbons Temperature Nanofibers Pyrolysis Monoxide Bundles Purity Gas
URL	查看原文
WOS记录号	WOS:000237590800018
引用统计	被引频次：31[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/34686
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	H. Zhang,C. H. Sun,F. Li,et al. Purification of multiwalled carbon nanotubes by annealing and extraction based on the difference in van der Waals potential[J]. Journal of Physical Chemistry B,2006,110(19):9477-9481.
APA	H. Zhang,C. H. Sun,F. Li,H. X. Li,&H. M. Cheng.(2006).Purification of multiwalled carbon nanotubes by annealing and extraction based on the difference in van der Waals potential.Journal of Physical Chemistry B,110(19),9477-9481.
MLA	H. Zhang,et al."Purification of multiwalled carbon nanotubes by annealing and extraction based on the difference in van der Waals potential".Journal of Physical Chemistry B 110.19(2006):9477-9481.