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．
Carbon nanotubes were systhesized at 1100 degreesC 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 similar to 6nm, and are as long as tens of microns. The outer diameter of the carbon nanotubes is in the range of 20 similar to 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.
出处
《无机材料学报》
SCIE
EI
CAS
CSCD
北大核心
2001年第5期945-950,共6页
Journal of Inorganic Materials
