Synthesis and Characterization of Fe Containing Imogolite(Soil and Non-Crystalline Clays,Proceedings of the 13^<th> International Clay Conference)
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概要
- 論文の詳細を見る
Imogolite is a tubular clay mineral with a typical chemical composition of (OH)_3Al_2O_3SiOH. This material has been expected as a shape selective catalyst, however, because of its chemical stability, an incorporation of another element is necessary to generate a chemical function. Thus Fe containing imogolite was prepared using NaSiO_4, FeCl_3 and AlCl_3. In the case of the ratio of Fe/(Al+Fe)=0.1 in the starting solution, the product was amorphous. In the case of the sample with the ratio of Fe/(Al+Fe)=0.05 named "Fe-imo", we obtained the XRD profile and the IR spectrum which were similar to those of the imogolite. The state of iron was found to be octahedral Fe^<3+> ion in the sample from the UV-VIS diffuse reflectance spectrum and X-ray absorption spectrum. The EXAFS function of Fe-imo is different from that of Fe^<3+> ion adsorbed on the imogolite (abbrev. Fe/imo). In the catalytic oxidation of cyclohexene, it was found that the catalytic properties were different for Fe-imo and Fe/imo. It is an interesting finding that Fe-imo catalyzed the oxidation of benzene to yield phenol. It is considered that state of Fe^<3+> in Fe-imo is different from that of Fe/imo and has higher potential toward oxidation reaction.
- 日本粘土学会の論文
著者
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Yamaguchi Tsutomu
Department of Agricultural Chemistry, University of Tokyo
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OOKAWA Masashi
Department of Applied Chemistry, Faculty of Engineering, Ehime University
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Ookawa Masashi
Department Of Applied Chemistry Faculty Of Engineering Ehime University
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WATANABE Masako
Department of Biochemistry, Faculty of Pharmaceutical Sciences, Tohoku University
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INOUE Yoshihiko
Department of Biochemistry, Fukui Medical University, Matsuoka
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Watanabe Masako
Department Of Applied Chemistry Faculty Of Engineering Ehime University
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SUZUKI MASAYA
Research Center for Deep Geological Environments, National Institute of Advanced Industrial Science
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Inoue Yoshihiko
Department Of Applied Chemistry Faculty Of Engineering Ehime University
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Suzuki Masaya
Research Center For Deep Geological Environments Aist
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Suzuki Masaya
Research Center For Deep Geological Environments National Institute Of Advanced Industrial Science A
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Yamaguchi Tsutomu
Department Of Applied Chemistry Faculty Of Engineering Ehime University
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Yamaguchi Tsutomu
Department Of Agricultural Chemistry University Of Tokyo
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