Topotactic conversion of β-helix-layered silicate into AST-type zeolite through successive interlayer modifications

Yusuke Asakura, Ryosuke Takayama, Toshimichi Shibue, Kazuyuki Kuroda

    Research output: Contribution to journalArticle

    20 Citations (Scopus)

    Abstract

    AST-type zeolite with a plate morphology can be synthesized by topotactic conversion of a layered silicate (β-helix-layered silicate; HLS) by using N,N-dimethylpropionamide (DPA) to control the layer stacking of silicate layers and the subsequent interlayer condensation. Treatment of HLS twice with 1)hydrochloric acid/ethanol and 2)dimethylsulfoxide (DMSO) are needed to remove interlayer hydrated Na ions and tetramethylammonium (TMA) ions in intralayer cup-like cavities (intracavity TMA ions), both of which are introduced during the preparation of HLS. The utilization of an amide molecule is effective for the control of the stacking sequence of silicate layers. This method could be applicable to various layered silicates that cannot be topotactically converted into three-dimensional networks by simple interlayer condensation by judicious choice of amide molecules.

    Original languageEnglish
    Pages (from-to)1893-1900
    Number of pages8
    JournalChemistry - A European Journal
    Volume20
    Issue number7
    DOIs
    Publication statusPublished - 2014 Feb 10

    Fingerprint

    Zeolites
    Silicates
    Ions
    Amides
    Condensation
    Molecules
    Hydrochloric Acid
    Hydrochloric acid
    Dimethyl Sulfoxide
    Ethanol

    Keywords

    • β-helix-layered silicate
    • interlayer condensation
    • octadecasil
    • silicates
    • zeolites

    ASJC Scopus subject areas

    • Chemistry(all)

    Cite this

    Topotactic conversion of β-helix-layered silicate into AST-type zeolite through successive interlayer modifications. / Asakura, Yusuke; Takayama, Ryosuke; Shibue, Toshimichi; Kuroda, Kazuyuki.

    In: Chemistry - A European Journal, Vol. 20, No. 7, 10.02.2014, p. 1893-1900.

    Research output: Contribution to journalArticle

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    AU - Kuroda, Kazuyuki

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