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Hydrothermal conversion of Mg2TiO4 into brookite-type TiO2 under mild conditions

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Abstract

A simple and mild synthetic route via a hydrothermal treatment of Mg2TiO4 has been developed to prepare brookite-type TiO2. The hydrothermal conversion of Mg2TiO4 to brookite proceeded in 1 M HCl solution even at 100 °C. The converted brookite grains were composed of the angular particles covered on the textured surface, leaving the original morphology of Mg2TiO4 grains. Compared with the commercially available TiO2 catalysts (rutile, anatase, and P25), the brookite obtained in this study showed a good photocatalytic activity toward the oxidation of benzyl alcohol to benzaldehyde under a simulated sunlight irradiation.

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Acknowledgements

The authors thank Prof. K. Yanagisawa of Research Laboratory of Hydrothermal Chemistry, Kochi University, for helpful discussions.

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Author notes

  1. Takahiro Kozawa

    Present address: Joining and Welding of Research Institute, Osaka University, 11-1 Mihogaoka, Ibaraki, Osaka, 567-0047, Japan

Authors and Affiliations

  1. Faculty of Pure and Applied Sciences, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki, 305-8573, Japan

    Takahiro Kozawa & Yoshikazu Suzuki

  2. Department of Applied Chemistry, Graduate School of Engineering, Hiroshima University, 1-4-1 Kagamiyama, Higashi-Hiroshima, Hiroshima, 739-8527, Japan

    Hideya Hattori & Shuhei Ogo

  3. World Premier International (WPI) Research Center for Materials Nanoarchitectonics (WPI-MANA), National Institute for Materials Science (NIMS), 1-1 Namiki, Tsukuba, Ibaraki, 305-0044, Japan

    Yusuke Ide

Authors
  1. Takahiro Kozawa
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  2. Hideya Hattori
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  3. Shuhei Ogo
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  4. Yusuke Ide
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  5. Yoshikazu Suzuki
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Correspondence to Takahiro Kozawa.

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Kozawa, T., Hattori, H., Ogo, S. et al. Hydrothermal conversion of Mg2TiO4 into brookite-type TiO2 under mild conditions. J Mater Sci 48, 7969–7973 (2013). https://doi.org/10.1007/s10853-013-7607-z

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  • DOI: https://doi.org/10.1007/s10853-013-7607-z

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