摘要
以甲烷为碳源、Fe/Mo/Al2O3为载体催化剂,应用热解火焰法制备碳纳米管。研究了氧炔焰温度和取样高度对碳纳米管合成的影响。取样高度为80 mm时,以外围氧炔焰温度940℃、1010℃、1100℃进行了3组实验。结果表明:随氧炔焰温度升高,碳纳米管产量增加且管径明显变细。氧炔焰温度为1100℃时最适宜碳纳米管的生长。当氧炔焰温度为1100℃时,取样高度为80 mm时产量相对于取样高度60 mm时更大。但取样高度为60 mm时合成的碳纳米管更加笔直。不同取样高度下均制得了双壁碳纳米管。
Carbon nanotubes were synthesized by pyrolysis flame method,using methane as carbon,Fe /Mo /Al2O3 as catalyst. The effect of oxy-acetylene flame temperature and sampling height on the carbon nanotubes was studied. The results show that when sampling height is 80 mm,with an oxygen-acetylene flame temperature increasing,the yield increased and the morphology of the carbon nanotubes changed greatly. 1100 ℃ is the most suitable flame temperature for synthesis of carbon nanotubes. The sampling height was studied with the oxy-acetylene flame temperature of 1100 ℃. It is found that the yield with sample height 80 mm is greater than sampling height 60 mm. However,when the sampling height is 60 mm,carbon nanotubes synthesis is more straight. In the experiment double-walled carbon nanotubes were synthesized with different sampling height.
出处
《人工晶体学报》
EI
CAS
CSCD
北大核心
2014年第8期2011-2015,共5页
Journal of Synthetic Crystals
基金
中央高校基本科研业务费专项资金资助(13MS07)
关键词
碳纳米管
甲烷
热解火焰
氧炔焰温度
取样高度
carbon nanotube
methane
flame pyrolysis
oxy-acetylene flame temperature
sampling height
