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Synthesis of Nanostructured Reduced Titanium Oxide: Crystal Structure Transformation Maintaining Nanomorphology

Authors

  • Dr. Satoshi Tominaka,

    Corresponding author
    1. International Center for Materials Nanoarchitectonics (MANA), National Institute for Materials Science (NIMS), Namiki 1-1, Tsukuba, Ibaraki 305-0044 (Japan), Fax: (+81) 29-851-3362
    • International Center for Materials Nanoarchitectonics (MANA), National Institute for Materials Science (NIMS), Namiki 1-1, Tsukuba, Ibaraki 305-0044 (Japan), Fax: (+81) 29-851-3362
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  • Dr. Yoshihiro Tsujimoto,

    Corresponding author
    1. International Center for Young Scientists (ICYS), NIMS, Namiki 1-1, Tsukuba, Ibaraki 305-0044 (Japan), Fax: (+81) 29-860-4706
    • International Center for Young Scientists (ICYS), NIMS, Namiki 1-1, Tsukuba, Ibaraki 305-0044 (Japan), Fax: (+81) 29-860-4706
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  • Dr. Yoshitaka Matsushita,

    1. NIMS Beamline Station at SPring-8, NIMS, 1-1-1 Kouto, Sayo-cho, Hyogo 679-5148 (Japan)
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  • Dr. Kazunari Yamaura

    1. Superconducting Materials Center, NIMS, Namiki 1-1, Tsukuba, Ibaraki 305-0044 (Japan)
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  • We thank Dr. Y. Nemoto (NIMS) for his experimental support in the TEM observation. This work was supported in part by the World Premier International Research Center Initiative on “Materials Nanoarchitechtonics” from MEXT, and by “FIRST Program” from JSPS (Japan). Y.T. thanks Grants-in-Aid for Research Activity (22850019) from MEXT (Japan).

Abstract

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Reduction without particle growth: Ti2O3 nanoparticles of corundum structure were synthesized by reducing TiO2 nanoparticles of rutile structure with CaH2 powder at a low temperature of 350 °C. The morphology of the reduced oxide was the same as that of the precursor, though the crystal structure was transformed from the tetragonal to the hexagonal system (see picture).

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