Controlling the diameter distribution of carbon nanotubes grown from camphor on a zeolite support

被引：146

作者：

Kumar, M ^{[1
]}

Ando, Y ^{[1
]}

机构：

[1] Meijo Univ, Dept Mat Sci & Engn, 21st Century COE Program Nanofactory, Tempaku Ku, Nagoya, Aichi 4688502, Japan

来源：

CARBON | 2005年 / 43卷 / 03期

关键词：

carbon nanotubes; chemical vapor deposition; catalyst support;

D O I：

10.1016/j.carbon.2004.10.014

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Single-wall and multi-wall carbon nanotubes (SWNTs and MWNTs, respectively) of controlled diameter distribution were selectively grown by thermal decomposition of a botanical hydrocarbon, camphor, on a high-silica zeolite support impregnated with Fe-Co catalyst. Effects of catalyst concentration, growth temperature and camphor vapor pressure were investigated in wide ranges, and diameter distribution statistics of as-grown nanotubes was analyzed. High yields of metal-free MWNTs of fairly uniform diameter (similar to10nm) were grown at 600-700degreesC, whereas significant amounts (similar to30%) of SWNTs were formed at 850-900degreesC within a narrow diameter range of 0.86-1.23 nm. Transmission electron microscopy and micro-Raman spectroscopy reveal that camphor-grown nanotubes are highly graphitized as compared to those grown from conventional CNT precursors used in chemical vapor deposition. (C) 2004 Elsevier Ltd. All rights reserved.

引用

页码：533 / 540

页数：8

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