Purification of Single-walled Carbon Nanotubes by Oxygen Oxidation in LiCl-KCl Molten Salt

Acta Chimica Sinica ›› 2010, Vol. 68 ›› Issue (05): 413-417. Previous Articles Next Articles

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LiCl-KCl熔盐中纯氧氧化提纯单壁碳纳米管

瞿美臻¹^{,2，林浩强¹，于作龙*^,1}

(¹中国科学院成都有机化学研究所成都 610041)
(²中国科学院研究生院北京 100039)

投稿日期:2009-06-15 修回日期:2009-09-29 发布日期:2010-03-14
通讯作者: 瞿美臻 E-mail:mzhqu@cioc.ac.cn
基金资助:
国家科技部重大科学研究计划资助课题（No.2006CB9327）；中国科学院知识创新工程重要方向项目资助课题（No. KJCX2-YW-M01）

Purification of Single-walled Carbon Nanotubes by Oxygen Oxidation in LiCl-KCl Molten Salt

Qu Meizhen¹^{,2 Lin Haoqiang¹ Yu Zuolong*^,1}

(¹Chengdu Institute of Organic Chemistry, Chinese Academy of Sciences, Chengdu 610041)
(²Graduate University of Chinese Academy of Sciences, Beijing 100039)

Received:2009-06-15 Revised:2009-09-29 Published:2010-03-14

Abstract

The purification of SWCNT by oxygen oxidation in LiCl-KCl molten salt was investigated. 5 g of as-prepared SWCNT was suspended in 200 g of molten salt (w_LiCl∶w_KCl＝55∶45) at 470 ℃ by agitation. After 2 h oxidation in 300 mL•min^－1 oxygen flow, 3.8% of purified SWCNT was obtained. The oxidation degree could be controlled by adjusting the reaction temperature and oxygen flow rate. Scanning electron microscopy (SEM), transmission electron microscopy (TEM), thermogravimetric analysis (TGA) and Raman spectra were employed to characterize the as-prepared and purified SWCNT. The results indicated that almost all of the amorphous carbon in as-prepared SWCNT was removed. However, the SWCNT can survive from this purification process.

Key words: carbon nanotube, molten salt, amorphous carbon, oxygen oxidation

Cite this article

JI Mei-Zhen, LIN Gao-Jiang, XU Zuo-Long. Purification of Single-walled Carbon Nanotubes by Oxygen Oxidation in LiCl-KCl Molten Salt[J]. Acta Chimica Sinica, 2010, 68(05): 413-417.

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LiCl-KCl熔盐中纯氧氧化提纯单壁碳纳米管

Purification of Single-walled Carbon Nanotubes by Oxygen Oxidation in LiCl-KCl Molten Salt

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