摘要
采用乙醇催化燃烧法,以钴盐作为催化剂先体、薄铜片作为基底制备碳纳米管。分别以氯化钴、硝酸钴和硫酸钴作为催化剂先体,研究了不同催化剂先体对碳纳米管生长的影响;利用扫描电镜,透射电镜对碳纳米材料的形貌和结构进行了表征,研究了不同钴盐的催化剂先体对碳纳米管形态与结构的影响,讨论了碳纳米管的生长机制。实验发现,其他制备条件相同,当催化剂先体为氯化钴时,碳纳米管与大量絮状杂质缠绕在一起;当催化剂先体为硝酸钴时,碳纳米管容易形成弯曲、不规则的波浪形结构;而当催化剂先体为硫酸钴时,实验所得的碳纳米材料几乎全为取向规则、直径均一的碳纳米纤维,只观察到少量碳纳米管。
The preparation of carbon nanotubes by ethanol catalytic combustion technique was reported. Cobalt salt was employed as catalyst precursors, copper plate as substrate and ethanol as carbon source. Cobalt chloride,cobalt nitrate and cobalt sulfate were employed as catalyst precursor to study the influence of catalysts on carbon nanotubes growth, respectively. The morphology and microstructure of the obtained carbon nanotubes was examined, the growth mechanism was discussed. Entangled and nonseparated carbon nanotubes are aggregated together when the catalyst precursor is cobalt chloride, while straight and uniform carbon nanotubes are obtained when the catalyst precursor is cobalt sulfate. In the case of using cobalt nitrate as catalyst precursor, the carbon nanotubes tend to form helical and disordered structure.
出处
《微纳电子技术》
CAS
2007年第7期60-62,共3页
Micronanoelectronic Technology
基金
北京市留学归国人员科技活动择优资助项目(66062021)
关键词
碳纳米管
碳纳米纤维
催化剂先体
carbon nanotubes
carbon nanofibers
catalyst precursor
