Preparation of a nanocomposite consisting of a siloxane network and perovskite-related nanosheets via a sol-gel process

Seiichi Tahara, Takafumi Okamoto, Yoshiyuki Sugahara

    研究成果: Article

    11 引用 (Scopus)

    抄録

    A nanocomposite possessing perovskite-related nanosheets dispersed in a siloxane network was prepared by cohydrolysis of the n-decoxy derivative of an ion-exchangeable layered perovskite, HCa2Nb3O10·xH2O (HCaNb), and tetramethoxysilane (TMOS) via a sol-gel process involving exfoliation. In the X-ray diffraction (XRD) pattern of the product after drying for 1 d, the (0 0 l) reflections disappeared. The transmission electron microscopy (TEM) image of the product after drying for 1 d showed dark lines with a thickness of 1.5 nm, which was consistent with the thickness of an individual nanosheet, indicating exfoliation of HCaNb. In the XRD patterns of the reaction products of the n-decoxy derivative of HCaNb and TMOS before drying and after drying for 60 min, (0 0 l) reflections were detected. After drying for 80 min, the intensity of the (0 0 l) reflections decreased. The intensity decreased with an increase in the drying time, indicating that the exfoliation of HCaNb occurred during the drying process.

    元の言語English
    ページ(範囲)446-450
    ページ数5
    ジャーナルScience and Technology of Advanced Materials
    7
    発行部数5
    DOI
    出版物ステータスPublished - 2006 7

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    Siloxanes
    Nanosheets
    Perovskite
    Sol-gel process
    Nanocomposites
    Drying
    Diffraction patterns
    Derivatives
    X ray diffraction
    perovskite
    Reaction products
    Ions
    Transmission electron microscopy

    ASJC Scopus subject areas

    • Materials Science(all)

    これを引用

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    abstract = "A nanocomposite possessing perovskite-related nanosheets dispersed in a siloxane network was prepared by cohydrolysis of the n-decoxy derivative of an ion-exchangeable layered perovskite, HCa2Nb3O10·xH2O (HCaNb), and tetramethoxysilane (TMOS) via a sol-gel process involving exfoliation. In the X-ray diffraction (XRD) pattern of the product after drying for 1 d, the (0 0 l) reflections disappeared. The transmission electron microscopy (TEM) image of the product after drying for 1 d showed dark lines with a thickness of 1.5 nm, which was consistent with the thickness of an individual nanosheet, indicating exfoliation of HCaNb. In the XRD patterns of the reaction products of the n-decoxy derivative of HCaNb and TMOS before drying and after drying for 60 min, (0 0 l) reflections were detected. After drying for 80 min, the intensity of the (0 0 l) reflections decreased. The intensity decreased with an increase in the drying time, indicating that the exfoliation of HCaNb occurred during the drying process.",
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