S 98 Synthesis and Magnetic Properties of M0.08Ti0.91V0.09O2 + δ . nH2O (M = Cr, Mn, Fe, Co, Ni) Nanopowders / G. S. Zakharova, V. L. Volkov, M. A. Uimin, A. A. Mysik, A. E. Ermakov // Inorganic Materials. - 2010. - Vol. 46, № 10. - P. 1115-1120 : il. - Bibliogr. : p. 1120 (20 ref.) Рубрики: ХИМИЧЕСКИЕ НАУКИ Кл.слова (ненормированные): ЗОЛЬ-ГЕЛЬ МЕТОД -- НАНОПОРОШКИ -- СВОЙСТВА МАГНИТНЫЕ -- ОКСИДЫ ТИТАНО-ВАНАДИЕВЫЕ Аннотация: Using sol–gel synthesis and ion exchange, we have prepared titanium vanadium oxide nanopowders doped with transition-metal ions: M0.08Ti0.91V0.09O2 + δ . nH2O with M = Cr, Mn, Fe, Co, and Ni. The valence state of the ions in the nanopowders and their morphology and structure have been studied by scanning electron microscopy, X-ray diffraction, IR spectroscopy, and X-ray photoelectron spectroscopy. The MxTi0.91V0.09O2 + δ . nH2O oxides dried in air or calcined at 400°C in air are shown to be paramagnets. Vacuum annealing of Co0.08Ti0.91V0.09O2 + δ . nH2O at 700°C gives rise to a significant ferromagnetic contribution Полный текст |