Enlargement of mesopores of 2-D orthorhombic KSW-2 type silica by the addition of poly(oxyethylene) alkyl ether during the mesostructural formation

Nobuyuki Takahashi, Tatsuo Kimura, Kazuyuki Kuroda

    Research output: Contribution to journal › Article

    1 Citation (Scopus)

    Abstract

    The size of mesopores in 2-D orthorhombic KSW-2 type silica, derived from a layered silicate kanemite, can be enlarged by the addition of poly(oxyethylene) alkyl ether (C16EO10) during the mesostructural transformation from a lamellar phase to a 2-D orthorhombic one. Precursors for pore-expanded KSW-2 type silica were prepared by an acid treatment of lamellar hexadecyltrimethylammonium-intercalated kanemite (C16TMA-kanemite) in the presence of C16EO10. The acid treatment induces simultaneous reactions of (1) intercalation of C16EO10, (2) deintercalation of C16TMA cations, and (3) mesostructural transformation into a 2-D orthorhombic phase. Depending on the concentration of C16EO10, the d11 spacing of the products after the acid treatment but before calcination varied from 4.0 to 5.4 nm and that of the calcined products varied from 3.5 nm to 4.8 nm. The method provides a precise control in a certain range of the pore size of KSW-2 type mesoporous silica.

    Original languageEnglish
    Pages (from-to)714-720
    Number of pages7
    JournalSolid State Sciences
    Volume13
    Issue number4
    DOIs
    Publication statusPublished - 2011 Apr

    Fingerprint

    Silicon Dioxide
    Ether
    Ethers
    ethers
    Silica
    silicon dioxide
    acids
    Acids
    porosity
    Silicates
    products
    Intercalation
    intercalation
    Calcination
    roasting
    Pore size
    Cations
    silicates
    Positive ions
    spacing

    Keywords

    • Brij56
    • Hexadecyltrimethylammonium
    • Kanemite
    • KSW-2
    • Mesoporous silica

    ASJC Scopus subject areas

    • Chemistry(all)
    • Materials Science(all)
    • Condensed Matter Physics

    Cite this

    Enlargement of mesopores of 2-D orthorhombic KSW-2 type silica by the addition of poly(oxyethylene) alkyl ether during the mesostructural formation. / Takahashi, Nobuyuki; Kimura, Tatsuo; Kuroda, Kazuyuki.

    In: Solid State Sciences, Vol. 13, No. 4, 04.2011, p. 714-720.

    Research output: Contribution to journal › Article

    Takahashi, N, Kimura, T & Kuroda, K 2011, 'Enlargement of mesopores of 2-D orthorhombic KSW-2 type silica by the addition of poly(oxyethylene) alkyl ether during the mesostructural formation', Solid State Sciences, vol. 13, no. 4, pp. 714-720. https://doi.org/10.1016/j.solidstatesciences.2010.06.023
    Takahashi N, Kimura T, Kuroda K. Enlargement of mesopores of 2-D orthorhombic KSW-2 type silica by the addition of poly(oxyethylene) alkyl ether during the mesostructural formation. Solid State Sciences. 2011 Apr;13(4):714-720. https://doi.org/10.1016/j.solidstatesciences.2010.06.023
    Takahashi, Nobuyuki ; Kimura, Tatsuo ; Kuroda, Kazuyuki. / Enlargement of mesopores of 2-D orthorhombic KSW-2 type silica by the addition of poly(oxyethylene) alkyl ether during the mesostructural formation. In: Solid State Sciences. 2011 ; Vol. 13, No. 4. pp. 714-720.
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    AB - The size of mesopores in 2-D orthorhombic KSW-2 type silica, derived from a layered silicate kanemite, can be enlarged by the addition of poly(oxyethylene) alkyl ether (C16EO10) during the mesostructural transformation from a lamellar phase to a 2-D orthorhombic one. Precursors for pore-expanded KSW-2 type silica were prepared by an acid treatment of lamellar hexadecyltrimethylammonium-intercalated kanemite (C16TMA-kanemite) in the presence of C16EO10. The acid treatment induces simultaneous reactions of (1) intercalation of C16EO10, (2) deintercalation of C16TMA cations, and (3) mesostructural transformation into a 2-D orthorhombic phase. Depending on the concentration of C16EO10, the d11 spacing of the products after the acid treatment but before calcination varied from 4.0 to 5.4 nm and that of the calcined products varied from 3.5 nm to 4.8 nm. The method provides a precise control in a certain range of the pore size of KSW-2 type mesoporous silica.

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