Preparation of Ultra Fine TiO2 Particles Dispersible in Organic Solvents and Their Photocatalytic Properties

Tadahiro Murakata; Ryoich Yamamoto; Yuichi Yoshida; Masanobu Hinohara; Tateaki Ogata; Shimio Sato

doi:10.1252/jcej.31.21

Catalysis, Kinetics and Reactor Design

Preparation of Ultra Fine TiO₂ Particles Dispersible in Organic Solvents and Their Photocatalytic Properties

Tadahiro Murakata, Ryoich Yamamoto, Yuichi Yoshida, Masanobu Hinohara, Tateaki Ogata, Shimio Sato

著者情報

キーワード: Titanium Oxide, Organic Colloidal Solution, Absorption Spectrum, ESR Spectrum, Photocatalytic Reaction

ジャーナル認証あり

1998 年 31 巻 1 号 p. 21-28

DOI https://doi.org/10.1252/jcej.31.21

詳細

抄録

Ultra fine TiO₂ particles which dispersed in various organic solvents were synthesized through hydrolysis of a titanium alkoxide to form colloidal TiO₂ particles, followed by modification of the colloidal particles with a hydrophobic coupling agent. The organic solvent solutions of the synthesized TiO₂ particles were transparent and had high colloidal stability. Photochemical properties of the TiO₂ particles in organic solvents were studied: namely how Ti³⁺ species were formed in the particles and accumulated in them; and how the particles were photocatalytically active for oxidation of I^– and reduction of methylene blue and Ag⁺. From comparative studies of the photocatalytic reactions, the TiO₂ particles are found to have higher photocatalytic activity than commercially available anatase and rutile powders.

責任著者(Corresponding author)

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