Yadav Ram Manohar, Shripathi T, Srivastava Anchal, Srivastava O N
Department of Physics, Banaras Hindu University, Varanasi 221005, India.
J Nanosci Nanotechnol. 2005 May;5(5):820-4. doi: 10.1166/jnn.2005.102.
We have investigated the effect of ferrocene concentration on the synthesis of carbon-nitrogen (C-N) nanotubes. The bamboo-shaped carbon-nitrogen nanotubes were synthesized by spray pyrolysis of Fe(C5H5)2 and CH3CN solution using argon as a carrier gas at the optimum temperature of approximately 900 degrees C. The effect of ferrocene concentration on the length and concentration of nitrogen in nanotubes was studied. Micro-structural features of the nanotubes were monitored employing scanning and transmission electron microscopic techniques. SEM studies reveal that with decreasing ferrocene concentration from 25 mg ml(-1) to 5 mg ml(-1), the length of the nanotubes vary from 80 microm to 430 microm. A feasible growth model has been described and discussed. X-ray photoelectron spectroscopic studies have confirmed the formation of nitrogen-doped carbon nanotubes. These studies reveal that the nitrogen concentration in the nanotubes decreases with the increase of ferrocene concentration. The present synthesis route also provides means of producing carbon nanotubes with different concentrations of nitrogen.
我们研究了二茂铁浓度对碳氮（C-N）纳米管合成的影响。在约900摄氏度的最佳温度下，以氩气作为载气，通过喷雾热解二茂铁（Fe(C5H5)2）和乙腈溶液合成了竹节状碳氮纳米管。研究了二茂铁浓度对纳米管长度和氮含量的影响。采用扫描电子显微镜和透射电子显微镜技术监测纳米管的微观结构特征。扫描电子显微镜研究表明，随着二茂铁浓度从25毫克/毫升降至5毫克/毫升，纳米管的长度从80微米变化到430微米。描述并讨论了一个可行的生长模型。X射线光电子能谱研究证实了氮掺杂碳纳米管的形成。这些研究表明，纳米管中的氮含量随着二茂铁浓度的增加而降低。目前的合成路线还提供了制备不同氮浓度碳纳米管的方法。
