2007 Fiscal Year Final Research Report Summary
Development of high sensitive gas sensors by using hetero junction of noble metal nanostructures and tin oxide microstructures
| Project/Area Number |
18550077
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Analytical chemistry
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| Research Institution | University of Miyazaki |
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Principal Investigator |
SAKAI Go University of Miyazaki, Department of Applied Chemistry, Faculty of Engineering, Associate Professor (40284567)
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| Co-Investigator(Kenkyū-buntansha) |
KIJIMA Tsuyoshi University of Miyazaki, Department of Applied Chemistry, Faculty of Engineering, Professor (90040451)
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| Project Period (FY) |
2006 – 2007
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| Keywords | Chemical Sensors / Noble metal nanostructures / Tin oxide microstructures / Semiconductor gas sensors / Hetero junction / Hvdrothermal treatment |
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| Research Abstract |
In this study, it was aimed at developing highly sensitive semiconductor gas sensors by using hetero junction of noble metal nanostructures and tin oxide microstructures. Noble metal nanostructures and tin oxide microstructures which were reported to be synthesized from mixed surfactant system are strong candidates for developing highly sensitive semiconductor gas sensors because of their unique structures and physicochemical properties. The main purpose of this study is construction of hierarchical structures of noble-metal-nanostructures/tm-cMde-narmparticles/tinoxide-micropartices. As for the synthesis of tin oxide nanoparticles, it was found that the tin oxide sols containing nanosized tin oxide particles were synthesized by the hydrothermal treatment of tin oxide gels derived from hydrolysis of tin chloride by using ammonium hydrogen carbonate. On the other hand, as for the synthesis of tin oxide microparticles, the spherical microparticles of SnO_2 in average diameter of 1-2 urn
… More
were synthesized successfully by hydrothermal treatment of their precursor consisting of SnCl_4 and mixed surfactants, followed by calcinations at 500℃. Furthermore, it was found that the SnCl_2 gives highly yield for the synthesis of spherical SnO_2 microparticles instead of SnCk It was also found that synthesis processes should be optimized especially for hydrothermal temperatures and treatment time in order to obtain high yield spherical SnO_2 microparticles. The mechanism of the formation of such spherical SnO_2 microparticles can be based on the hydrolysis process of tin chloride in viscous media consisting mixed surfactants as well as calcination process of the precursor. Similar spherical microparticles can be synthesized in the absence of surfactants, but their surface is fairly rough in contrast to those synthesized in the presence of surfactants. The semiconductor gas sensors prepared by using these spherical microparticles showed highly sensitivity to hydrogen gas and their sensitivity was 4 time higher than that of commercially available tin oxides Less
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Research Products
(28 results)
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[Journal Article] Effect of Electron Irradiation on Nanogroove-Networked Single-crystalline and Dendritic Polycrystalline Platinum Nanosheets Prepared from Lyotropic Surfactant Liquid-Crystal Templates2008
Author(s)
T., Yoshimura, M., Uota, T., Kuwahara, D., Fujikawa, H., Kawasaki, G., Sakai, T., Kijima
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Journal Title
Materials Research Bulletin 43
Pages: 1282-1290
Description
「研究成果報告書概要(欧文)」より
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[Journal Article] Synthesis of Nanogroove-Network Structured Platinum Nanosheets and Their Carbon-supported Forms by Mixed Surfactant-Templating Approach2007
Author(s)
Go, Sakai, Takumi, Yoshimura, Shusaku, Isohata, Masafumi, Uota, Hideya, Kawasaki, Takeshi, Kuwahara, Daisuke, Fujikawa, Tsuyoshi, Kijima
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Journal Title
Advanced Materials 19
Pages: 237-241
Description
「研究成果報告書概要(欧文)」より
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[Journal Article] Long-Chain Alcohol Induced Phase Transition in Lyotropic Mixed Polyoxyethylene-type Surfactant Liquid-Crystals2007
Author(s)
T., Kijima, Y., Nishida, D., Fujikawa, M., Uota, T., Yoshimura, G., Sakai
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Journal Title
Journal of Molecular Liquids 133
Pages: 54-60
Description
「研究成果報告書概要(欧文)」より
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[Presentation] Mixed-Surfactant-Templated Synthesis of Nanogroove Network Structured Platinum Nanosheets and Their Electrochemical Char acteriz ation2007
Author(s)
T., Kijima, T., Yoshimura, G., Sakai, S., Isohata, M., Uota, H., Kawasaki, D., Fujikawa
Organizer
MRS Spring Meeting
Year and Date
20070400
Description
「研究成果報告書概要(欧文)」より
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[Presentation] Effect of Electron Irradiation on Nanogroove-networked Single Crystalline and Dendritic Polycrystalline Platinum Nanosheets2007
Author(s)
M., Uota, T., Yoshimura, T., Kuwahara, D., Fujikawa, H., Kawasaki, G., Sakai, T., Kijima
Organizer
MRS Spring Meeting
Year and Date
20070400
Description
「研究成果報告書概要(欧文)」より
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[Presentation] Synthesis and electrochemical properties of carbon-supported spongy platinum nanosheets from mixed-surfactant liquid crystal templates2005
Author(s)
G., Sakai, S., Isohata, T., Kuwahara, T., Yoshimura, M., Uota, H., Kawasaki, T., Kijima
Organizer
The 2005 International Chemical Congress of Pacific Basin Societies
Year and Date
20051200
Description
「研究成果報告書概要(欧文)」より
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[Presentation] Synthesis and characterization of spongy platinum nanosheets from lyotropic mixed surfactant liquid-crystal templates2005
Author(s)
T., Yoshimura, M., Uota, D., Fujikawa, T., Kuwahara, H., Kawasaki, Y., Kamida, G., Sakai, T., Kijima
Organizer
The 2005 International Chemical Congress of Pacific Basin Societies
Year and Date
20051200
Description
「研究成果報告書概要(欧文)」より
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[Presentation] Nanostructurally controlled synthesis of platinum using lyotropic mixed surfactant liquid-crystal templates2005
Author(s)
T., Kijima, T., Yoshimura, M., Uota, D., Fujikawa, T., Kuwahara, Y., Kamida, H., Kawasaki, G., Sakai
Organizer
The 2005 International Chemical Congress of Pacific Basin Societies
Year and Date
20051200
Description
「研究成果報告書概要(欧文)」より
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[Presentation] Oxygen reduction properties of spongy platinum nanosheets loaded carbon2005
Author(s)
G., Sakai, S., Isohata, T., Yoshimura, T., Kuwahara, M., Uota, H., Kawasaki, T., Kijima
Organizer
18th Fall Meeting of The Ceramic Society of Japan & The 1st Oceania Ceramic Federation(AOCF) Conference
Year and Date
20050900
Description
「研究成果報告書概要(欧文)」より
