Enrichment of Small-Diameter Double-Wall Carbon Nanotubes Synthesized by Catalyst-Supported Chemical Vapor Deposition Using Zeolite Supports
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概要
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A highly efficient enrichment of thin double-wall carbon nanotubes (DWNTs) having an average outer diameter of ca. 1.4 nm by thermal oxidative purification has been reported. Thin DWNTs of ca. 1% with respect to single-wall carbon nanotubes (SWNTs), which are synthesized by catalyst-supported chemical vapor deposition (CCVD) on zeolite supports, are enriched up to ca. 90% (vs SWNTs) by thermal oxidation in air. The present thin DWNTs grown on zeolite are several hundreds of times as resistant as SWNTs toward the oxidation at 700 °C. When oxidative purification is applied for DWNTs with larger diameters, the amount of DWNTs lost during the purification process is large compared to thinner DWNTs lost. The present oxidative purification is much more effective for thin DWNTs with diameters smaller than 2 nm.
- 2007-04-15
著者
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Yoshikawa Masahito
Chemical Research Laboratories Toray Industries Inc.
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RAMESH Palanisamy
CREST, Japan Science and Technology Agency
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KIMURA Junichi
Department of Chemistry, Nagoya University
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SATO Kenichi
Chemical Research Laboratories, Toray Industries Inc.
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Ozeki Yuji
Chemical Research Laboratories Toray Industries Inc.
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Kishi Naoki
Department Of Chemistry And Institute For Advanced Research Nagoya University
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Hiraoka Tatsuki
Department Of Chemistry Nagoya University
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Sugai Toshiki
Department Of Chemistry And Institute For Advanced Research Nagoya University
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Shinohara Hisanori
Department Of Cardiology And Clinical Research
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Ramesh Palanisamy
CREST, Japan Science and Technology Agency, c/o Department of Chemistry, Nagoya University, Nagoya 464-8602, Japan
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Sato Kenichi
Chemical Research Laboratories, Toray Industries Inc., Nagoya 455-8502, Japan
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Kimura Junichi
Department of Chemistry, Nagoya University, Nagoya 464-8602, Japan
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Kishi Naoki
Department of Chemistry, Nagoya University, Nagoya 464-8602, Japan
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Hiraoka Tatsuki
Department of Chemistry, Nagoya University, Nagoya 464-8602, Japan
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