CVD宏观量半连续制备纳米碳管的研究  

CVD Method to Synthesize Carbon Nanotubes on a Large Scale

作　　者：孙沿林[1] 张孝彬[1] 宁月生[1] 孔凡志[1] 刘芙[1] 

机构地区：[1]浙江大学材料化工学院电镜实验室,硅材料国家重点实验室,杭州310027

出　　处：《无机材料学报》2002年第2期337-342,共6页Journal of Inorganic Materials

基　　金：国家自然科学基金(59872030)

摘　　要：研究了以乙炔为基本原料，用Ｎ２做载流气体；以纳米钻颗粒为催化剂在７００～８００℃常压下纳米碳管的宏观量制备．粗产品中纳米碳管的含量接近５０％，而且纳米碳管缺陷很少，直而长，石墨化好．纳米碳管的形核过程是因为碳在催化剂表面分布不均匀造成的．纳米碳管的生长极限在１５ｍｉｎ左右，然后生长变得缓慢，纳米碳管的一般长度在５～３０μｍ．Acetylene cracked under normal pressure at 700similar to800degreesC with active nanoscale cobalt particles as catalyst and carbon nanotubes were prepared on a large scale. The final product rate was above 50wt% after 10min growth, and also defects were almost nonexistent. The lengthes of the carbon nanotubes ranged from 5 to 30mum. Non-well distributed carbon on catalyst surface accelerated the nucleating process. The growing time limitation was about 15min and then growing process became slow.

关 键 词：纳米碳管 化学气相沉积 常压 溶胶-凝胶 

分 类 号：TQ127[化学工程—无机化工] O613.71[理学—无机化学]