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タイトル: | Preparation of nanosized metal (oxides) by gas phase hydrolysis using mesoporous materials as nanoreactors |
著者: | Ingmar, Gerlach Kawase, Motoaki https://orcid.org/0000-0003-1850-0030 (unconfirmed) Miura, Kouichi |
著者名の別形: | 河瀬, 元明 |
キーワード: | Alkoxide Hydrolysis Metal nanoparticles Metal oxide nanoparticles Nanoreactor |
発行日: | Nov-2009 |
出版者: | Springer Verlag |
誌名: | Journal of Nanoparticle Research |
巻: | 11 |
号: | 8 |
開始ページ: | 2049 |
終了ページ: | 2059 |
抄録: | Immobilized nanosized metal (oxides) on carbonaceous carriers were prepared by hydrolysis under mild conditions by using the carrier pores as a kind of nanoreactor. Metal alkoxide vapor was adsorbed on the carrier and then formed the product upon exposure to water vapor. With this facile method, Titania, Vanadia, Rhodium (oxide), and Platinum (oxide) nanostructures were prepared at high yields, high loadings, and good dispersion in the carrier material. High number concentrations of spheroidal nanoparticles of uniform size (diameter ca. 5 nm) were obtained from less reactive precursors, whereas with highly reactive precursors, such nanoparticles occurred only after subsequent calcination. Nanoparticles appeared to be the thermodynamically stable form of the metal (oxide) produced in the pores. Highly reactive precursors formed metastable seeds, which nucleated and restructured into nanoparticles upon subsequent exposure to heat. The presented method allows for preparation of metal (oxide) nanostructures and effective control of their size and shape. |
著作権等: | c 2008 Springer Science+Business Media B.V. この論文は出版社版でありません。引用の際には出版社版をご確認ご利用ください。 This is not the published version. Please cite only the published version. |
URI: | http://hdl.handle.net/2433/87732 |
DOI(出版社版): | 10.1007/s11051-008-9570-1 |
出現コレクション: | 学術雑誌掲載論文等 |
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