Hits:

Indexed by:期刊论文

Date of Publication:2011-03-01

Journal:CARBON

Included Journals:SCIE、EI

Volume:49

Issue:3

Page Number:854-861

ISSN No.:0008-6223

Abstract:An improved model of C(2)H(2) deposition for the growth of carbon nanotubes (CNT) in a horizontal tube reactor has been developed. This includes detailed gas-phase reactions of acetylene pyrolysis, and surface catalytic reactions for CNT growth. Based on this model, the mechanism of CNT growth has been studied by analyzing the change of the CNT growth rate for different growth conditions such as pressure, temperature, number of catalyst nanoparticles per unit area, and diameters of catalyst nanoparticles. The influence of gas-phase reactions and their products on CNT growth has also been evaluated. It is found that although C(2)H(2) is the main contributor to the growth of CNTs, the contribution from the gas-phase products could not be ignored, especially at high temperature. Crown Copyright (C) 2010 Published by Elsevier Ltd. All rights reserved.