Preparation of TiO2 thin films using water-soluble titanium complexes and their photoinduced properties

Ken Ichi Katsumata, Yukiaki Ohno, Koji Tomita, Munetoshi Sakai, Akira Nakajima, Masato Kakihana, Akira Fujishima, Nobuhiro Matsushita, Kiyoshi Okada

    Research output: Contribution to journalArticlepeer-review

    8 Citations (Scopus)

    Abstract

    Titanium dioxide thin films were prepared by using four water-soluble titanium complexes of titanium-lactate, tartalate, malate and salicylate complex solutions. The crystalline phases detected in the films were anatase. The surface microstructures of the four film samples were different in their grain sizes. Photocatalytic decomposition activity of the four films was almost the same, but their photoinduced hydrophilicities were different. The film prepared using titanium-salicylate complex exhibited lower hydrophilic conversion rate than the other films. Grain size and stress yielded to the film are considered to be important factors on the photoinduced hydrophilicity. Titanium dioxide (TiO2) films prepared by using water-soluble titanium complexes had different surface microstructures with the kind of the complexes. The contact angle on the samples decreased with UV irradiation time, but the hydrophilic conversion rate seems to be different from each other. With increasing the grain size on the film surface, the rate was slow. It is considered that grain size and stress yielded to the film surface are important factors on the photoinduced hydrophilicity.

    Original languageEnglish
    Pages (from-to)988-994
    Number of pages7
    JournalPhotochemistry and Photobiology
    Volume87
    Issue number5
    DOIs
    Publication statusPublished - 2011 Sep

    ASJC Scopus subject areas

    • Biochemistry
    • Physical and Theoretical Chemistry

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