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化学学报
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化学学报 ›› 2010, Vol. 68 ›› Issue (05): 413-417. 上一篇    下一篇

研究论文

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. (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   

  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

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以LiCl-KCl (wLiCl∶wKCl＝55∶45)熔盐为反应介质, 对在熔盐中纯氧氧化提纯单壁碳纳米管(SWCNT)进行了研究. 发现可以通过控制熔盐温度和氧气流量来控制氧化反应温和地进行. 将5 g SWCNT粗产品分散在200 g熔盐中, 在470 ℃下用300 mL•min－1氧气氧化2 h可获得3.8% SWCNT收率. 采用TEM, SEM, TGA和Raman 谱对提纯前后SWCNT的形貌和组成进行了分析, 发现提纯后SWCNT产品中无定形碳被有效去除, 而SWCNT结构未发现明显变化.

关键词: 碳纳米管, 熔盐, 无定形碳, 氧气氧化

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 (wLiCl∶wKCl＝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