Thermal stability and behavior of platelet-shaped SBA-15 containing Zr

Yoshihiro Usami, Teruhisa Hongo, Atsushi Yamazaki

    Research output: Contribution to journalArticle

    9 Citations (Scopus)

    Abstract

    SBA-15 with a platelet shape, containing Zr(IV), (Zr-SBA-15) was prepared to characterize its thermal stability and thermal behavior in comparison with conventional, rod-shaped SBA-15. The small angle X-ray diffraction (SAXRD) lines of Zr-SBA-15 and SBA-15 disappeared at 1,373 and 1,273 K, respectively. The pore diameter of the Zr-SBA-15 was almost constant from 773 to 1,073 K and decreased above 1,173 K, whereas the SBA-15 pore diameter decreased with increasing calcination temperature from 773 to 1,173 K. Therefore, the thermal stability of the Zr-SBA-15 was higher than that of SBA-15. Zr(IV) distributed within the framework prevents the pores from shrinkage by heating, and the Zr(IV) forms a ZrO2 crystalline phase above 1,273 K. When calcined at 1,873 K, the Zr-SBA-15 mesostructure collapsed while maintaining its hexagonal platelet shape. The collapse of the mesostructure at 1,373 K, caused the Zr-SBA-15 to shrink in the width direction by approximately 40% compared with that calcined at 773 K, although the dimension hardly changed in the thickness direction.

    Original languageEnglish
    Pages (from-to)897-902
    Number of pages6
    JournalJournal of Porous Materials
    Volume19
    Issue number5
    DOIs
    Publication statusPublished - 2012 Oct

    Fingerprint

    Platelets
    Thermodynamic stability
    Calcination
    Crystalline materials
    Heating
    X ray diffraction
    Temperature
    SBA-15
    Hot Temperature

    Keywords

    • Mesoporous silica
    • SBA-15
    • Thermal behavior
    • Thermal stability
    • Zr containing

    ASJC Scopus subject areas

    • Mechanical Engineering
    • Mechanics of Materials
    • Materials Science(all)

    Cite this

    Thermal stability and behavior of platelet-shaped SBA-15 containing Zr. / Usami, Yoshihiro; Hongo, Teruhisa; Yamazaki, Atsushi.

    In: Journal of Porous Materials, Vol. 19, No. 5, 10.2012, p. 897-902.

    Research output: Contribution to journalArticle

    Usami, Yoshihiro ; Hongo, Teruhisa ; Yamazaki, Atsushi. / Thermal stability and behavior of platelet-shaped SBA-15 containing Zr. In: Journal of Porous Materials. 2012 ; Vol. 19, No. 5. pp. 897-902.
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