2007 Fiscal Year Final Research Report Summary
High-speed growth of carbon nanomaterials in organic liquids
| Project/Area Number |
17350093
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Functional materials/Devices
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| Research Institution | Toyo University |
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Principal Investigator |
NISHITANI-GAMO Mikka (西谷 美香) Toyo University, APPLIED CHEMISTRY, ASSOCIATE PROFESSOR (00323270)
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| Co-Investigator(Kenkyū-buntansha) |
ANDO Toshihiro NATIONAL INSTTTUTE FOR MATERIALS SCIENCE, ADVANCED NANO MATERIALS LABORATORY, GROUPLEADER (80343846)
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| Project Period (FY) |
2005 – 2007
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| Keywords | nanomaterials / nanotubes / materials chemistry / environmental materials / advanced functional materials (6) |
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| Research Abstract |
We have developed the solid-liquid interfacial catalytic synthesis for yielding various nano-structured materials with high selectivity in this study. This novel method bases on surface reaction and deposition on the catalytic substrate with organic compounds at elevated temperatures. The surface temperature of the substrates should be kept at high in the organic liquid, while the temperature of the organic liquid is lower than its boiling point. The catalytic reraction must proceed just at the surface with the elevated temperature and no reaction can proceed in the cold liquid. Very little secondary product was appeared in the whole reaction system. The high temperatured surface of the substrate in the cold liquid can be kept under nonequilibrium condition and give various novel nano-structured materials which can not be produced under normal equibrium conditions. We have studied the reaction conditions and the relation between the reaction conditions and the product structures and de
… More
signed the optimum reactor. We have obserbed the followings :
1) The product structures (macro- and nano-scaled) were affected by the surface temperature. The linear fiber structure was obtained at the temperature arround 600C.
2) The catalyst particles affected the product structures (both macro- and nano-sturacture) and their growth rate.
3) Cabon Nano Tubes (CNT) with long fiber length with high crystallinity were successfully produced by the double step reaction, the initial reaction temperature was 600C with shorter reaction time and the second reaction temperature was kept at 900C with longer reaction time.
4) The catalyst was influenced by its oxidational condition. Catalytic reactivity could be controlled by the pre-oxidation treatment. The product strucrures were also affected the oxidational condition.
5) CNTs with 10 micromerter length were obtained by the 5 min reaction with this method. We have discovered the potential advantages of the solid-liquid interfacial catalytic synthesis under highly nonequibrium condition. That can produce various nano-structured materials with high selectivity and high efficiency and supply the product for several application developments. We study their applications for electrochmistry electrode, electron emission cathod, fuel cell, soller cell, dielectric capacitors. Less
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