The influences of synthesis time on the growth of CNTs over Ni/Al catalyst by CVD

摘要：

Carbon nanotubes (CNTs) had been synthesized in different time by catalytic decomposition of methane over Ni/Al catalyst by chemical vapor deposition at 550℃. After 5min decomposition of methane, the CNTs showed less crystallinity and tubular graphite sheets. At the same time, the shape of nickel particle had changed from quasi-sphere to quasi-cone. As synthesis time was prolonged to 30min, the CNTs with better crystallinity and herringbone structure could be achieved and nickel particle became more standard cone-shaped. The interaction between the CNTs and nickel particle might take place during the synthesis. A simple model for the growth of herringbone CNTs and the distortion of nickel particle was hypothesized.

关键词： Carbon nanotubes Chemical vapor deposition Transmission electron microscopy

作者: Haipeng Li Naiqin Zhao Chunsheng Shi Xiwen Du Jianli Kang Qingran Cui

作者单位: School of Materials Science and Engineering, Tianjin University, Tianjin 300072, China;School of Mat School of Materials Science and Engineering, Tianjin University, Tianjin 300072, China

会议类型: 国际会议

会议名称: The Fifth International Conference on Physical and Numerical Simulation of Materials Processing(第五届材料与热加工物理模拟及数值模拟国际会议)

会议地点: 郑州

会议语种:英文

在线出版日期: 2007-10-23（万方平台首次上网日期，不代表论文的发表时间）