Polymorph control of calcium carbonate on the surface of mesoporous silica

Kwang Min Choi, Kazuyuki Kuroda*

*この研究の対応する著者

研究成果: Article査読

20 被引用数 (Scopus)

抄録

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.

本文言語English
ページ(範囲)887-893
ページ数7
ジャーナルCrystal Growth and Design
12
2
DOI
出版ステータスPublished - 2012 2月 1

ASJC Scopus subject areas

  • 化学 (全般)
  • 材料科学(全般)
  • 凝縮系物理学

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