Song Xin, Fang Yan
Beijing Key Lab for Nano-Photonics and Nano-Structure, Capital Normal University, Beijing 100037, PR China.
Spectrochim Acta A Mol Biomol Spectrosc. 2007 Jul;67(3-4):1131-4. doi: 10.1016/j.saa.2006.09.036. Epub 2006 Oct 6.
A technique of purifying SWCNTs has been developed by means of oxidizing carbonaceous particles with air using fluidized-bed. Air was introduced into the fluidized-bed by pump with controllable flux. The powders were "boiling" at a temperature of 550 degrees C for 50 min. With this technique, the flux can be controlled simply. The fluidized-bed was applied as the heating apparatus instead of rotated quartz tubes. The air and the powders can be mixed with each other more sufficiently. Characteristics of the raw and purified powder were presented using Raman spectroscopy and transmission electronic microscopy (TEM), revealing that the purified powder is free from carbonaceous particles.
一种通过在流化床中用空气氧化碳质颗粒来纯化单壁碳纳米管的技术已经被开发出来。空气通过泵以可控流量引入流化床。粉末在550摄氏度的温度下“沸腾”50分钟。通过这种技术，可以简单地控制流量。流化床被用作加热装置，取代了旋转石英管。空气和粉末能够更充分地相互混合。使用拉曼光谱和透射电子显微镜（TEM）展示了原始粉末和纯化后粉末的特性，结果表明纯化后的粉末不含碳质颗粒。
