Synthesis of bamboo - Structured multiwalled carbon nanotubes by spray pyrolysis method, using a mixture of benzene and pyridine
Synthesis of bamboo - Structured multiwalled carbon nanotubes by spray pyrolysis method, using a mixture of benzene and pyridine
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使用苯和吡啶的混合物，通过喷雾热解法合成竹结构多壁碳纳米管
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发表时间：
2007
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通讯作者：
L. Biró
中科院分区：
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作者：
P. Nemes;N. S. Daroczi;Zs. Sárközi;A. Koós;K. Kertész;O. Ţiprigan;Z. Horváth;A. Darabont;L. Biró
喷雾热解是碳纳米管合成中应用最广泛的方法之一。这主要是因为其可扩展性和所生产的碳纳米管的低成本。在我们的合成实验中，多壁碳纳米管 (MWCNT) 是通过将二茂铁液态烃溶液喷射到石英反应器中形成的，并在氩气的帮助下加热到约 800°C 的温度。发现最合适的碳源是苯及其衍生物（甲苯、二甲苯）。在我们当前的论文中，我们报道了如何使用这种简单的方法来生产具有竹结构的多壁碳纳米管，如 TEM 和 HRTEM 测量所证明的那样。通过将吡啶添加到二茂铁-苯溶液中获得竹结构的多壁碳纳米管。我们研究了吡啶浓度对所得样品中竹子多壁碳纳米管的比例和形貌的影响。已知这种竹形纳米管的结构中含有氮。氮掺杂对碳纳米管的物理性能有重要影响。掺杂纳米管的潜在应用包括气体传感器、纳米级发射器和纳米电子器件。
Spray pyrolysis is one of the most widely used methods for carbon nanotube synthesis. This is mainly because of its scalability and the low cost of the carbon nanotubes produced. In our synthesis experiments, multiwalled carbon nanotubes (MWCNT) are formed by spraying a solution of ferrocene-liquid hydrocarbon into a quartz reactor, heated to a temperature of around 800°C, with the aid of Ar gas. The most suitable carbon sources are found to be benzene and its derivatives (toluene, xylene). In our current paper we report, how this simple method can be used, to produce MWCNTs with bamboo structure, as evidenced by TEM and HRTEM measurements. Bamboo-structured MWCNTs are obtained by adding pyridine to the ferrocene-benzene solution. We have studied the effect of pyridine concentration on the ratio and morphology of the bamboo MWCNTs in the obtained samples. Such bamboo-shaped nanotubes are known to contain nitrogen incorporated into their structure. The nitrogen doping has an important effect on the physical properties of carbon nanotubes. Potential applications of doped nanotubes include gas sensors, nanoscale emitters and nanoelectronic devices.