Preparation of titania-silica cryogels with controlled shapes and photocatalysis through unidirectional freezing

Hirotomo Nishihara, Shin R. Mukai, Seiji Shichi, Hajime Tamon

    Research output: Contribution to journalArticlepeer-review

    19 Citations (Scopus)

    Abstract

    Homogeneous titania-silica binary hydrogels were molded into various shapes, microhoneycomb, self-standing bundle, microfibers, and powder, by a unidirectional freezing method. Moreover, by freeze-drying the unidirectionally frozen samples, the honeycomb walls or microfibers obtained were converted into mesoporous cryogels which possessed considerable high surface areas (up to 1057 m2 g- 1) and large mean pore diameters of 2-6 nm. Thanks to the high porosity and well-dispersed titania, the titania-silica binary cryogels exhibited very high photocatalytic activity in the decomposition of salad oil under ultraviolet irradiation.

    Original languageEnglish
    Pages (from-to)959-961
    Number of pages3
    JournalMaterials Letters
    Volume64
    Issue number8
    DOIs
    Publication statusPublished - 2010 Apr 30

    Keywords

    • Aerogels
    • Microstructure
    • Photocatalyst
    • Self-assembly
    • Sol-gel preparation
    • Template synthesis

    ASJC Scopus subject areas

    • Materials Science(all)
    • Condensed Matter Physics
    • Mechanics of Materials
    • Mechanical Engineering

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