摘要
以纳米级复合物NiO SiO2为催化剂、甲烷为碳源,采用催化分解法制备了碳纳米管,并运用TEM对不同实验条件下得到的纳米碳管进行了形貌分析。结果表明:反应温度对碳纳米管的产率和形貌有着很重要的影响。反应温度过高或过低,碳纳米管的产率都很低。适合碳纳米管生长的温度范围是620℃～720℃,在660℃～680℃之间反应可得到稳定的产率。在640℃～680℃之间可以得到高纯度的产物,温度过高或过低时得到的碳纳米管形貌不均一而且含有很多杂质。
Carbon nanotubes were synthesized from methane using a NiO/SiO 2 nanosized catalyst. The results indicated that the reaction temperature had an important influence on the yield, purity and morphologies of the nanotubes. A comparative study showed that the yield was low when the reaction temperature was too low or too high. The suitable temperature for the growth of carbon nanotubes was found in the range of 620?℃～720?℃, where 660?℃～ 680?℃ was the range in which carbon nanotubes could grow stably. TEM showed that the carbon nanotubes had an inhomogeneous morphology and contained many impurities when the reaction temperature was too high or too low, the suitable temperature range was 640?℃～680?℃ for high purity.
出处
《新型炭材料》
SCIE
EI
CAS
CSCD
2002年第4期53-56,61,共5页
New Carbon Materials
基金
武汉市科技计划资助项目(20011007088)~~
