介绍了用V型热解火焰燃烧器制备碳纳米管的实验条件,利用扫描电子显微镜和透射电子显微镜对碳纳米管进行表征,详细研究和分析了温度、反应物成分、催化剂、燃氧比等影响因素对碳纳米管形态的影响.结果表明:温度在800～1000 ℃之间,采用CO/H_2/He作为反应气体,用Fe(CO)_5作为催化剂时,可以得到的形态较好、杂质较少的碳纳米管.
The V-type pyrolysis flame experimental system was introduced to synthesize carbon nanotubes. The carbon nanotubes from the experiment were characterized by scanning electron microscope and transmission electron microscope. The major factors including temperature, gas content, catalyst and equilibrium rate affected in carbon nanotubes synthesis were discussed. Carbon nanotubes with good morphology and less impurity can be captured when the temperature is from 800 ℃ to 1000 ℃, carbon monoxide/hydrogen/helium mixed gas flow is supplied and pentacarbonyl iron is served as the catalyst.
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