A simple and highly effective process for the purification of single-walled carbon nanotubes synthesized with arc-discharge

被引:26
|
作者
Cho, Hyeon Gu [1 ]
Kim, Sang Won [1 ]
Lim, Hyeong Jun [1 ]
Yun, Chang Hoon [2 ]
Lee, Heon Sang [2 ]
Park, Chong Rae [1 ]
机构
[1] Seoul Natl Univ, Sch Mat Sci & Engn, RIAM, Carbon Nanomat Design Lab,GRL, Seoul 151744, South Korea
[2] LG Chem Ltd, Ctr Technol, Taejon 305343, South Korea
关键词
Compilation and indexing terms; Copyright 2024 Elsevier Inc;
D O I
10.1016/j.carbon.2009.08.017
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
We developed a simple and highly effective process for the purification of single-walled carbon nanotubes (SWCNTs) synthesized with arc-discharge. The new process consists of two steps: (i) ultrasonic filtration of an aqueous acid solution of the SWCNTs, and (ii) heat-treatment at 430 degrees C for 1 h under a moisture-saturated N-2 atmosphere. This simple process results in the remarkably effective removal of impurities such as amorphous carbon, carbon nanoparticles, and metallic catalysts. Further, the whole purification process can be completed within 5 h, which is much faster than conventional acid purification processes, which require 50 h, and much less destructive than other conventional purification methods. In a gram-scale purification, the proposed purification method gave us 150 mg of purified SWCNTs with the purity of 96.2 wt% out of 1.0 g of as-prepared SWCNTs, which corresponds to similar to 72% yield as for the initial composition of SWCNTs in the as-prepared soot. Field emission scanning electron microscopy, high resolution transmission electron microscopy, thermogravimetric analysis, X-ray diffractometry and Raman spectroscopy were used to determine the effects of the new purification process on the SWCNTs. (c) 2009 Elsevier Ltd. All rights reserved.
引用
收藏
页码:3544 / 3549
页数:6
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