一种制备碳纳米管的新方法  

A novel method for synthesizing carbon nanotubes

作　　者：郑举功[1] 陈泉水[1] 杨婷[1] 

机构地区：[1]东华理工大学材料科学与工程系,江西抚州344000

出　　处：《功能材料》2007年第A06期2306-2309,共4页Journal of Functional Materials

基　　金：基金项目：国防基础研究资助项目（A3420061167）

摘　　要：以化学改性的膨润土为催化剂，利用化学气相沉积法催化裂解CH4，在高温条件下成功地制备了碳纳米管，并用透射电镜对其形貌与结构特征进行了表征。结果表明，所得产物形状弯曲，管径为15-20nm，长度达微米级的均匀碳纳米管；膨润土释放的金属铁起到了催化CH4的作用，在800℃条件下生长的碳纳米管质量最好、产率最高，若催化反应温度过高则会降低产品的质量，催化温度低于700℃时不能用来制备碳纳米管，与传统的过渡金属催化剂相比，这种矿物催化剂原料成本低廉，制备工艺简单，有利于碳纳米管的工业化生产。Titanate modification bentonite could catalyze acetylene to synthesis carbon nanotubes at high temperature by thermal chemical vapor deposition. The element iron contained in bentonite acts as the catalytic metal of nanotubes, whose formation was discussed in the note. A conclusion was drawn that the quality and quantity of carbon nanotubes were best and largest, respectively, at 800℃. If the temperature is higher than 900℃, the quality of nanotubes would be bad. The catalytic capacity of modified bentonite would disappear of 〈700℃. The catalyst is cheaper and its treatment is simpler than traditional metal catalyst, which may accelerate industrial synthesis of carbon nanotubes.

关 键 词：化学改性 膨润土 碳纳米管 催化生长 

分 类 号：TB383[一般工业技术—材料科学与工程] TQ127.1[化学工程—无机化工]