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流动催化法连续制备碳纳米管及其形态和结构的研究

郑国斌; 施益峰; 冯景伟; 郭景坤   

  1. 中国科学院上海硅酸盐研究所 上海 200050
  • 收稿日期:2000-08-24 修回日期:2000-02-14 出版日期:2001-09-20 网络出版日期:2001-09-20

Morphology and Structure of Carbon Nanotube Synthesized Continuously by Floating Catalysis of Hydrocarbon

ZHENG Guo-Bin; SHI Yi-Feng; FENG Jing-Wei; GUO Jing-Kun   

  1. Shanghai Institute of Ceramics; Chinese Academy of Sciences; Shanghai 200050; China
  • Received:2000-08-24 Revised:2000-02-14 Published:2001-09-20 Online:2001-09-20

摘要: 以二茂铁作为催化剂来源、以苯作为碳源、氢气和氩气分别作为载气和稀释气体,在1100℃连续地合成了碳纳米管.碳纳米管的生成分二个过程:催化生长和表面无定形碳的生成.所得到的碳纳米管的内径为3~6nm,而外径约为20~70nm碳纳米管的外径随气体流速的增加而变细,在较细的碳纳米管中观察到了由催化生长而成的具有光滑薄壁的原始碳纳米管.生成的碳纳米管的长度达数十微米、直径较均匀,其端部大多为圆形,但也观察到其他的形状的端部.

关键词: 碳纳米管, 流动催化法, 二茂铁

Abstract: Carbon nanotubes were systhesized at 1100℃ by using ferrocene as the source of catalyst, benzene as source of carbon, hydrogen and argon as the
carrying and diluting gas, respectively, and their structures were analyzed by SEM, TEM and XRD. The inner core of the carbon
nanotube was observed in thinner nanotubes. The formation of carbon nanotubes consists of two steps: the catalysis growth of nanotubes and the deposition
of amorphous carbon. The carbon nanotubes obtained have a hollow diameter of 3~6nm, and are as long as tens of microns. The outer diameter of the
carbon nanotubes is in the range of 20~70nm and uniform along their longitude, and decreases with the increasing of the flow rate of gases. The tips of
the as-grown nanotubes are typically round, though other types of tips existing.

Key words: carbon nanotube, floating catalysis, ferrocene

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