Carbon Nanotube Formation over Supported Catalysts
作者:
Klara Hernadi,
Patricia Piedigrosso,
Antonio Fonseca,
JonasB. Nagy,
Imre Kiricsi,
期刊:
Molecular Crystals and Liquid Crystals Science and Technology. Section A. Molecular Crystals and Liquid Crystals
(Taylor Available online 1998)
卷期:
Volume 310,
issue 1
页码: 179-184
ISSN:1058-725X
年代: 1998
DOI:10.1080/10587259808045333
出版商: Taylor & Francis Group
关键词: carbon nanotubes;catalytic synthesis;purified nanotubes
数据来源: Taylor
摘要:
Catalytic synthesis and characterization of multi-wall fullerene nanotubes are presented. Supported transition metal catalysts were prepared by different methods and were tested in the decomposition of hydrocarbons. Reactions were carried out in a fixed bed flow reactor at 700°C at atmo-spheric pressure. Both activity and selectivity of catalyst samples depended mainly on the following parameters: catalyst support, transition metal, initial reactant, and reaction temperature. The quality of the product was charac-terized by TEM. Although the ends of these catalytically produced carbon nanotubes are often closed by fullerenic half-onions, they can be opened with ease in a relatively gentle liquid-phase oxidation procedure. Neither drastic purification process with HF nor oxidative treatment destroyed the quality of the tubes. IR and XPS investigations confirmed that carbon nano-tubes having inner diameter larger than 1–2 nm show graphitic feature.
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