Flame Synthesis of Carbon Nanotubes and Nanocapsules

被引：3

作者：

Ding Zhao-yong ^{[1
]}

Sun Bao-min ^{[1
]}

Jia Bin ^{[1
]}

Ding Xiao-lian ^{[2
]}

机构：

[1] N China Elect Power Univ, Sch Energy Power & Mech Engn, Beijing, Peoples R China

[2] N China Elect Power Univ, Sch Elect & Elect Engn, Beijing, Peoples R China

来源：

NANO-SCALE AND AMOURPHOUS MATERIALS | 2011年 / 688卷

基金：

美国国家科学基金会;

关键词：

Carbon Nanotubes; Nanocapsules; Pyrolysis flame; Sampling time; Catalyst concentration; FE-SEM; HR-TEM;

D O I：

10.4028/www.scientific.net/MSF.688.116

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Flame synthesis of carbon nanotubes and nanocapsules is demonstrated via a pyramid-shaped pyrolysis flame. The mixture of CO, H-2, and nebulized catalyst raw material reacts in a high temperature environment formed inside the frustum of pyramid-shaped reactor heated by premixed flame of C2H2 and air outside. A sampling substrate inserted into the incomplete combusting flame of central reacting mixtures can gain the samples of carbon nanotubes and nanocapsules. The effect of sampling time and catalyst concentration is revealed via Field emission scanning electron microscope (FE-SEM) and High-resolution transmission electron microscopy (HR-TEM). 5-mins sampling time and 0.5/50 (Fe(CO)(5)/C2H5OH, volume ratio) of catalyst concentration is the most appropriate for carbon nanotubes synthesis. In addition, it is to say that catalyst concentration is the most important one among all the factors that can be used to determine whether the main products are carbon nanotubes or nanocapsules, and the structures of nanocapsules are also analyzed in detail.

引用

页码：116 / +

页数：2

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