CO、H_2、He流量对热解焰合成碳纳米管的影响  

Effects of CO,H_2 and He Flow Rate on the Synthesis of Carbon Nanotubes via Pyrolysis Flame

作　　者：丁兆勇[1] 孙保民[1] 刘远超[1] 许秉浩[1] 

机构地区：[1]华北电力大学电站设备状态监测与控制教育部重点实验室,北京102206

出　　处：《人工晶体学报》2010年第3期702-707,共6页Journal of Synthetic Crystals

基　　金：国家自然科学基金(No.50676032);长江学者和创新团队发展计划资助(IRT0720)

摘　　要：在用热解火焰法合成碳纳米管(carbon nanotubes,CNTs)过程中,CO、H2和He流量对产物种类以及CNTs的产量、结构、管径、管长等有显著影响。为了确定CO、H2和He流量的具体影响,通过固定其他实验条件,仅改变CO、H2和He流量,用扫描电子显微镜(SEM)和高分辨率透射电子显微镜(HR-TEM)对合成的产物进行表征,分析得到合成CNTs较好的CO、H2和He流量分别为0.4L/min,0.3L/min和0.2L/min。In the experiment of carbon nanotubes（CNTs） synthesized by pyrolysis flame method,the flow rates of CO,H2 and He have great impact on the products type,the yield,structure,pipe diameter and the length of CNTs.In order to figure out the specific impact of gas flow rate,many different results were observed under the condition that the flow rates of CO,H2,and He were changed only with other parameters fixed.By the means of SEM and HR-TEM characterizing,a more suitable flow rate of CO,H2 and He for the synthesis of carbon nanotubes were 0.4 L/min,0.3 L/min and 0.2 L/min,respectively.

关 键 词：碳纳米管 流量 热解火焰 SEM TEM 

分 类 号：TB383[一般工业技术—材料科学与工程]