Liu Qixin, Fang Yan
Beijing Key Lab for Nanophotonics and Nanostructure, Department of Physics, Capital Normal University, Beijing 100037, PR China.
Spectrochim Acta A Mol Biomol Spectrosc. 2006 May 15;64(2):296-300. doi: 10.1016/j.saa.2005.07.023. Epub 2006 Mar 10.
A new technique of synthesizing single-walled carbon nanotubes (SWCNTs) has been developed by means of the catalytic chemical vapor deposition (CVD) method from ethanol over MgO supported catalyst using fluidized-bed. Ethanol vapor was introduced into the fluidized-bed from a temperature-controlled bubbler by the flow of Ar without rotary pump. With this technique, the reaction conditions can be controlled simply. The fluidized-bed was applied as the reactor instead of quartz boats. Ethanol vapor and the powder of catalyst can be mixed with each other more sufficiently. MgO support can be easily removed from SWCNTs by acid solution. Characteristics of as-grown SWCNTs were presented using Raman spectroscopic and transmission electron microscopy (TEM), revealing that the SWCNTs produced by this method possess the significant quality of being free from amorphous carbons and having uniform diameter.
一种通过催化化学气相沉积（CVD）法，以乙醇为原料，在MgO负载催化剂上利用流化床合成单壁碳纳米管（SWCNT）的新技术已经被开发出来。乙醇蒸汽通过氩气流从一个温度可控的鼓泡器引入流化床，无需旋转泵。采用这种技术，可以简单地控制反应条件。流化床被用作反应器，取代了石英舟。乙醇蒸汽和催化剂粉末能够更充分地相互混合。MgO载体可以通过酸溶液轻松地从SWCNT中去除。利用拉曼光谱和透射电子显微镜（TEM）展示了生长态SWCNT的特性，结果表明通过该方法制备的SWCNT具有不含无定形碳且直径均匀的显著品质。
