Polymorph control of calcium carbonate on the surface of mesoporous silica

Kwang Min Choi, Kazuyuki Kuroda

    Research output: Contribution to journalArticle

    14 Citations (Scopus)

    Abstract

    The influence of mesoporous silica on the polymorph selectivity in CaCO 3 has been investigated. Vaterite is selectively formed from an aqueous solution containing CaCl 2 and Na 2CO 3 by precipitation under the presence of KIT-6-type mesoporous silica. Crystallization time of vaterite from amorphous calcium carbonate (ACC) is much longer on the addition of KIT-6 than that reported previously, indicating the remarkable stabilization of ACC on the surface of mesoporous silica. Other types of silica affect the polymorph selectivity; the addition of amorphous silica gel or assembled silica nanoparticles 12 nm in particle size induced the formation of vaterite as a main phase whereas the presence of assembled silica nanoparticles 30 nm in particle size resulted in the formation of calcite as a main phase with a minor component of vaterite. Therefore, the porous nature of the surfaces of silica greatly influences the polymorph, and a sort of "surface confinement" should play a major role in the selectivity of polymorph.

    Original languageEnglish
    Pages (from-to)887-893
    Number of pages7
    JournalCrystal Growth and Design
    Volume12
    Issue number2
    DOIs
    Publication statusPublished - 2012 Feb 1

    Fingerprint

    Calcium Carbonate
    calcium carbonates
    Calcium carbonate
    Polymorphism
    Silicon Dioxide
    Silica
    silicon dioxide
    selectivity
    Particle size
    Nanoparticles
    nanoparticles
    Silica Gel
    Calcite
    Silica gel
    silica gel
    Crystallization
    calcite
    Stabilization
    stabilization
    crystallization

    ASJC Scopus subject areas

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

    Cite this

    Polymorph control of calcium carbonate on the surface of mesoporous silica. / Choi, Kwang Min; Kuroda, Kazuyuki.

    In: Crystal Growth and Design, Vol. 12, No. 2, 01.02.2012, p. 887-893.

    Research output: Contribution to journalArticle

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