X-ray diffraction characterization with monochromatic synchrotron X-rays has demonstrated that xY(2)O(3) center dot (1 - x)TiO2 (x = 0.5-0.58) solid solutions consist of a fluorite-like (Fm3m) disordered phase and a nanoscale (a parts per thousand integral 40-1000 nm) pyrochlore-like (Fd3m) ordered phase of the same composition, coherent with the disordered phase. In the composition range of the solid solutions (0.5 a parts per thousand currency sign x a parts per thousand currency sign 0.58), the lattice parameter of the fluorite-like phase follows Vegard's law. The formation of nanodomains with different degrees of order is shown to be caused by the internal strain due to the high density of structural defects in their unit cells. The materials obtained in this study possess enhanced sorption capacity and can be used as catalysts, catalyst supports, gas sensors, etc.
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Univ Tokyo, Dept Chem, Bunkyo Ku, 7-3-1 Hongo, Tokyo 1130033, JapanUniv Tokyo, Dept Chem, Bunkyo Ku, 7-3-1 Hongo, Tokyo 1130033, Japan
Suzuki, Atsushi
Hirose, Yasushi
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Univ Tokyo, Dept Chem, Bunkyo Ku, 7-3-1 Hongo, Tokyo 1130033, Japan
Kanagawa Acad Sci & Technol, Takatsu Ku, 3-2-1 Sakado, Kawasaki, Kanagawa 2130012, JapanUniv Tokyo, Dept Chem, Bunkyo Ku, 7-3-1 Hongo, Tokyo 1130033, Japan
Hirose, Yasushi
Nakao, Shoichiro
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Kanagawa Acad Sci & Technol, Takatsu Ku, 3-2-1 Sakado, Kawasaki, Kanagawa 2130012, JapanUniv Tokyo, Dept Chem, Bunkyo Ku, 7-3-1 Hongo, Tokyo 1130033, Japan
Nakao, Shoichiro
Hasegawa, Tetsuya
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Univ Tokyo, Dept Chem, Bunkyo Ku, 7-3-1 Hongo, Tokyo 1130033, Japan
Kanagawa Acad Sci & Technol, Takatsu Ku, 3-2-1 Sakado, Kawasaki, Kanagawa 2130012, JapanUniv Tokyo, Dept Chem, Bunkyo Ku, 7-3-1 Hongo, Tokyo 1130033, Japan
机构:
Bulgarian Acad Sci, Cent Lab Solar Energy & New Energy Sources, BU-1784 Sofia, BulgariaBulgarian Acad Sci, Cent Lab Solar Energy & New Energy Sources, BU-1784 Sofia, Bulgaria
Vitanov, P
Harizanova, A
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Bulgarian Acad Sci, Cent Lab Solar Energy & New Energy Sources, BU-1784 Sofia, BulgariaBulgarian Acad Sci, Cent Lab Solar Energy & New Energy Sources, BU-1784 Sofia, Bulgaria
Harizanova, A
Ivanova, T
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Bulgarian Acad Sci, Cent Lab Solar Energy & New Energy Sources, BU-1784 Sofia, BulgariaBulgarian Acad Sci, Cent Lab Solar Energy & New Energy Sources, BU-1784 Sofia, Bulgaria
Ivanova, T
Ivanova, K
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Bulgarian Acad Sci, Cent Lab Solar Energy & New Energy Sources, BU-1784 Sofia, BulgariaBulgarian Acad Sci, Cent Lab Solar Energy & New Energy Sources, BU-1784 Sofia, Bulgaria