摘要
本文重点描述了应用Fe/Mo/Al2O3载体载入式催化剂,以CO为碳源,通过氧炔焰形成热解火焰合成单壁、双壁和三壁碳纳米管的实验过程。研究了合成温度,取样时间以及碳源气体CO流量对最终产物的影响。结果表明,830℃的合成温度可以满足合成单壁、双壁和三壁碳纳米管所需要的高温环境,消除载体催化剂聚合物对碳纳米管的包裹,大幅提高合成产物的产量;10 min的取样时间以及0.4 L/min的CO流量可以良好分散载体催化剂聚合物团簇,进而优化产物形态和进一步提高产量。
Single,double and triple-walled carbon nanotubes were synthesized by pyrolysis flame using substrate-support catalyst Fe/Mo/Al2O3 and CO as carbon source via oxyacetylene pyrolysis flame.The effects of synthesis temperatures,sampling time and flow rate of carbon source gas on the synthesized product were studied.It is found that a synthesis temperature of 830 ℃ can provide high temperature environment to synthesize single,double and triple-walled carbn nanotubes and eliminate wrapped substrate-support catalyst polymers on carbon nanotubes,then make a substantial increase in production.When sampling time is 10 min and CO flow rate is 0.4 L/min,substrate-support catalyst polymer clusters can be perfectly smashed,then further optimize products and increase production.
出处
《人工晶体学报》
EI
CAS
CSCD
北大核心
2011年第4期947-952,共6页
Journal of Synthetic Crystals
基金
中央高校基本科研业务费专项资金(10MG15)资助项目
关键词
碳纳米管
热解火焰
合成温度
取样时间
气体流量
carbon nanotubes
pyrolysis flame
synthesis temperature
sampling time
flow rate
