气体流量对热解火焰法合成碳纳米管的影响

Effect of Gas Flow Rate on the Carbon Nanotubes Synthesized by Flame Pyrolysis Method

采用热解火焰法制备了碳纳米管,研究了不同气体流量对碳纳米管制备的影响。结果表明:He流量变化会对碳纳米管形态产生影响,CH4、H2流量变化对碳纳米管形态影响不大;He、H2、CH4流量变化会影响碳纳米管的产量,当He、H2、CH4流量比2∶3∶6时,碳纳米管产量最高且产物主要是单壁、双壁、三壁碳纳米管。

Carbon nanotubes were synthesized by flame pyrolysis method. The effect of different gas flow rate on synthesis of carbon nanotubes was studied. The results show that He flow rate change will affect the morphology of the carbon nanotubes. CH4,H2 flow rate change does not affect the morphology of the carbon nanotubes. He,H2,CH4 flow rate change affects the yield of carbon nanotubes. When He,H2,CH4 flow rate was 2∶ 3∶ 6,the yield of carbon nanotubes is the highest and the product is mainly single-,double- and triple-wall carbon nanotubes.