Effect of hydrogen on the growth and morphology of single wall carbon nanotubes synthesized on a Fe-Mo/MgO catalytic system

被引：42

作者：

Biris, Alexandru R. ^{[1
]}

Li, Zhongrui ^{[2
,3
]}

Dervishi, Enkeleda ^{[2
,3
]}

Dan Lupu ^{[1
]}

Xu, Yang ^{[2
,3
]}

Saini, Viney ^{[2
,3
]}

Watanabe, Fumiya ^{[3
]}

Biris, Alexandru S. ^{[2
,3
]}

机构：

[1] Natl Inst Res & Dev Isotop & Mol Technol, RO-3400 Cluj Napoca, Romania

[2] Univ Arkansas, Dept Appl Sci, Little Rock, AR 72204 USA

[3] Univ Arkansas, Nanotechnol Ctr, Little Rock, AR 72204 USA

来源：

PHYSICS LETTERS A | 2008年 / 372卷 / 17期

关键词：

single wall carbon nanotubes; chemical vapor deposition; catalysis;

D O I：

10.1016/j.physleta.2008.01.023

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Single wall carbon nanotubes were synthesized from thermal pyrolysis of methane on a Fe-Mo/MgO catalyst by radio frequency catalytic chemical vapor deposition (RF-CVD) using argon as a carrier gas. Controlled amounts of hydrogen (H-2/CH4 = 0-1 v/v) were introduced in separate experiments along with the carbon source. The properties and morphology of the synthesized single wall carbon nanotubes were monitored by transmission electron microscopy, Raman scattering, and thermogravimetric analysis. The nanotubes with the highest crystallinity were obtained with H-2/CH4 = 0.6. By monitoring the Radial Breathing Modes present in the Raman spectra of the single-wall carbon nanotube samples, the variation of the structural and morphological properties of the carbon nanotubes with the flow level of hydrogen, reflect changes of the catalyst systems induced by the presence of hydrogen. (c) 2008 Elsevier B.V. All rights reserved.

引用

页码：3051 / 3057

页数：7

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