A one-step technique to prepare aligned arrays of carbon nanotubes
A one-step technique to prepare aligned arrays of carbon nanotubes
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DOI：
10.1088/0957-4484/19/15/155602
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发表时间：
2008-04
期刊：
影响因子：
3.5
通讯作者：
P. Mahanandia;K. Nanda
中科院分区：
文献类型：
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作者：
P. Mahanandia;K. Nanda
发展了一种简单有效的热解技术，在700 °C的单级炉中在不使用任何载气的情况下合成定向多壁碳纳米管（MWCNTs）阵列。该技术几乎消除了与用于制备CNT的其他广泛使用的方法（例如化学气相沉积（CVD）和热解）相关的整个复杂且昂贵的机械。以二甲苯、环己烷、樟脑、己烷、甲苯、吡啶和苯为碳源，二茂铁为催化剂，分别热解得到了碳纳米管阵列。采用扫描电子显微镜（SEM）、X射线衍射（XRD）、透射电子显微镜（TEM）、热重分析（TGA）和拉曼光谱对合成的碳纳米管进行了表征。在该技术中，可以避免对繁琐和耗时的金属催化剂制备和连续进料的含载气的碳源材料的需要。该方法是一个单步过程，其中不需要监测许多参数以制备取向的MWCNT。对于碳纳米管的制备，该技术具有成本低、操作简单等优点。
A simple effective pyrolysis technique has been developed to synthesize aligned arrays of multi-walled carbon nanotubes (MWCNTs) without using any carrier gas in a single-stage furnace at 700 °C. This technique eliminates nearly the entire complex and expensive machinery associated with other extensively used methods for preparation of CNTs such as chemical vapour deposition (CVD) and pyrolysis. Carbon source materials such as xylene, cyclohexane, camphor, hexane, toluene, pyridine and benzene have been pyrolyzed separately with the catalyst source material ferrocene to obtain aligned arrays of MWCNTs. The synthesized CNTs have been characterized by scanning electron microscopy (SEM), x-ray diffraction (XRD), transmission electron microscopy (TEM), thermogravimetric analysis (TGA) and Raman spectroscopy. In this technique, the need for the tedious and time-consuming preparation of metal catalysts and continuously fed carbon source material containing carrier gas can be avoided. This method is a single-step process where not many parameters are required to be monitored in order to prepare aligned MWCNTs. For the production of CNTs, the technique has great advantages such as low cost and easy operation.