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提出了气相形核生长(VPN)机理解释浮动催化体系中碳纳米管的生长过程。浮动催化系统中生长碳纳米管的活性碳原子是由苯热解产生的,被硫原子部分覆盖的液态铁颗粒是单壁碳纳米管的形核中心,生成的单壁碳纳米管继续径向生长、逐渐石墨化后,得到多壁碳纳米管。气相形核生长机理能够解释浮动催化系统生长碳纳米管的结构特征。
A gas phase nucleation (VPN) mechanism is proposed to explain the growth of carbon nanotubes in a floating catalyst system. The active carbon atoms that grow carbon nanotubes in a floating catalytic system are produced by benzene pyrolysis, and the liquid iron particles partially covered by sulfur atoms are the nucleation centers of single-walled carbon nanotubes. The generated single-walled carbon nanotubes continue to be radially After growth and gradual graphitization, multi-walled carbon nanotubes were obtained. The mechanism of gas phase nucleation and growth can explain the structural characteristics of carbon nanotubes grown in a floating catalytic system.