采用流化床反应器的ACCVD法制备单壁碳纳米管  

Synthesizing of Single-walled Carbon Nanotubes by ACCVD Method Using Fluidized-bed

作　　者：刘启鑫[1] 方炎[1] 

机构地区：[1]首都师范大学北京市纳米光电子学重点实验室物理系,北京100037

出　　处：《光电子．激光》2006年第2期143-146,共4页Journal of Optoelectronics·Laser

基　　金：国家自然科学基金资助项目(20275024);北京市自然科学基金资助项目(2982010)

摘　　要：采用流化床反应器,利用MGO作为催化剂载体,通过乙醇为碳源的化学气相沉积(ACCVD)法合成了单壁碳纳米管(SWCNTS)。该方法是让AR气流直接携带乙醇蒸汽进入反应器,用流化床反应器代替石英舟,使乙醇蒸汽与催化剂混合更加均匀,有利于SWCNTS的生成。采用MGO催化剂载体,易于用浓HCL对产物进行提纯。拉曼光谱和透射电镜(TEM)分析结果表明,通过该方法合成的SWCNTS具有无定型碳含量少、管径均匀等特点。A new technique to synthesize single-walled carbon nanotubes（SWONTs） has been developed by means of the alcohol catalytic chemical vapor deposition（ACCVD） method on MgO supported catalyst using fluidized-bed. Ethanol vapor was introduced into the fluidized-bed from a temperature-controlled bubbler by the flow of Ar. With this technique,the reaction conditions can be controlled simply. The fluidized-bed was applied as the reactor instead of quartz boats. Ethanol vapor and the powder of catalyst can be mixed with each other more sufficiently. MgO support can be easily removed from SWCNTs by acid solution, Characteristics of as-grown SWCNTs were presented using Raman spectroscopic analysis and TEM, The experimental results show that the SWCNTs produced by this method possess the significant quality of being free from amorphous carbons and having uniform diameter.

关 键 词：单壁碳纳米管(SWCNTs) 流化床 乙醇为碳源的化学气相沉积(ACCVD) 拉曼光谱 

分 类 号：O443[理学—电磁学]