金属铈催化剂对单壁纳米碳管生长和结构的影响

研究了一种利用新型催化剂制备单壁纳米碳管（SWNTs）的工艺方法.将金属铈的氧化物（Ce O₂）与石墨粉按一定比例混合，填充到已打好孔的石墨棒中制成复合石墨电极 ，以其为阳 极在高温氦电弧中实施电弧放电.放电后的生成物经高分辨透射电子显微镜（HRTEM）和拉曼 光谱(Raman)的观察及分析表明：生成物中含有大量呈束状存在的单壁纳米碳管，管径均匀 ，平均直径为120—132nm. 关键词： 单壁纳米碳管 电弧放电 透射电镜分析

Influence of cerium metal as catalyst on the growth and structure of single-walled carbon nanotubes

A method to prepare single-walled carbon nanotubes (SWNTs) by using a new type o f catalyst is presented. With a certain proportion, cerium oxide (CeO₂) and gr aphite powders were mixed. The mixture was then filled into the longitudinal hol es of graphite sticks used as composite graphite electrode. With it as the anode , arc discharge was carried out in He atmosphere. The resultant collected was ob served and analyzed by using HRTEM and Raman spectroscopic analysis, indicating that a large amount of SWNTs with a uniform diameter were close-packed in bundl es and the average diameter of SWNTs was about 120nm—132nm.