Paper Title:

Parameters Affecting the Structure and Yield of Carbon Nanotubes in CVD Method

Periodical Materials Science Forum (Volumes 544 - 545)
Main Theme Eco-Materials Processing and Design VIII
Edited by Hyungsun Kim, Junichi Hojo and Soo Wohn Lee
Pages 773-776
DOI 10.4028/www.scientific.net/MSF.544-545.773
Citation Guo Bin Zheng et al., 2007, Materials Science Forum, 544-545, 773
Online since May, 2007
Authors Guo Bin Zheng, Hideaki Sano, Yasuo Uchiyama
Keywords Carbon Nanofiber, Carbon Nanotube (CNT), Catalyst, Chemical Vapor Deposition (CVD)
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Abstract

Carbon nanotubes and nanofibers were synthesized at 400-800˚C by a typical CVD method using SiO2, Al2O3, or MgO supported Ni or Co catalyst, and acetylene as feedstock. The effects of temperature, substrates and catalyst on the yield and structure of carbon nanotubes and nanofibers were investigated in detail. The experimental results showed that Ni based catalysts tended to form carbon nanofibers with “herringbone” structure, though for Ni/Al2O3 catalyst, the products at 800ºC changed to a structure like carbon nanotube. Co based catalysts tended to form carbon nanotubes.