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化学学报
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化学学报 ›› 2011, Vol. 69 ›› Issue (12): 1403-1407. 上一篇    下一篇

研究论文

氯掺杂提高多壁碳纳米管的电导率

高建生，徐学诚*   

  1. (华东师范大学物理系 上海 200062)
  • 投稿日期:2010-07-28 修回日期:2010-12-21 发布日期:2011-02-18
  • 通讯作者: 徐学诚 E-mail:xcxu@phy.ecnu.edu.cn

Improvement of Electrical Conductivity of Multi-walled Carbon Nanotubes by Chlorine-doping

Jian-Sheng GAO1,   

  1. (Department of Physics of East China Normal University, Shanghai 200062)
  • Received:2010-07-28 Revised:2010-12-21 Published:2011-02-18

PDF

1369

被引次数

6

通过氯气吸附, 制备了掺氯多壁碳纳米管(Cl2-MWNTs)复合材料, 在低温、高温和紫外光照射条件下掺氯, 紫外光照射下掺氯制备的复合材料电导率最高, 和未掺氯MWNTs相比, 电导率提高到原来的5倍以上. 用热重、红外吸收光谱、紫外-可见吸收光谱、拉曼光谱和X光电子能谱分析研究掺氯碳纳米管中氯和MWNTs间的相互作用, 结果表明: 掺氯后MWNTs中π电子向氯转移, 氯与MWNTs形成共轭体系, π电子的离域性增强, 提高了复合材料的电导率.

关键词: 多壁碳纳米管, 氯, 掺杂, 电导率, 紫外光

Cl2-MWNTs composites were fabricated by chlorine-absorpting under the conditions of low temperature, high temperature and UV irradiation. Under the condition of UV irradiation, the electrical conductiviy of the Cl2-MWNTs composite was best. Compared with the undoped MWNTs, the electrical conductivity was improved to over 5 times. TG, FTIR, UV-vis and XPS analyses were used to study the interactions between chlorine and MWNTs. It was showed that the π-electrons were transferred from MWNTs to chlorine and conjugated system was formed between MWNTs and chlorine. The electrical conductivities of the composites were improved due to the higher degree delocalization of the π-electrons.

Key words: MWNTs, chlorine, doping, electrical conductivity, UV-light