单壁纳米碳管制备的新进展

综述了成熟的且能大量合成纯度较好的单壁纳米碳管(SWCNTS)的制备方法,分析不同的制备方法的特点以及关键的工艺参数,并在同一制备方法中讨论工艺条件的改变对合成SWCNTS产物的影响.催化剂及碳源种类以及它们的配比在制备SWCNTS中起决定重要作用.此外,电弧电流及电压、惰性气体种类及压力、电极的冷却速度等因素是电弧法制备SWCNTS的重要参数.激光束的强度、环境温度、惰性气体的种类及流速、脉冲的频率及间隔时间等工艺参数决定激光蒸发法制备SWCNTS的产物.而碳源的流量,催化剂粒度大小、反应温度,气体压强以及基体材料等在有机气体催化热解法合成SWCNTS中发挥重要作用.

Recent Advances in Synthesizing Single-walled Carbon Nanotubes

The main synthesis of single-walled carbon nanotubes (SWCNTS) on a large scale and in higher purity is investigated. To analyse the characteristic of different synthesis and the major parameters whose variety influence the product. The kinds and ratio of carbon source and catalyst influence the preparation of SWCNTS obviously.The factors such as current and voltage,the kind of inert gases and pressure and the cooling rate of electrodes play important roles in synthesis of SWCNTS by arc discharges. The intensity of laser bean,environmental temperature,the kind and the velocity of flow of catalyst and the frequency and interval of impulse act important parts in SWCNTS produced by laser evaporation. The flow rate of carbon resource, the grain sizes of catalyst,reaction temperature,the gases pressure and flux and matrix materials etc play key parts in SWCNTS synthesized by chemical vapor deposition.