Quantitative EPR Investigation of Binary Mixed Oxides Containing V2O5 Prepared by Mechanochemical Activation

• Published in: Applied magnetic resonance 2021-08, Vol.52 (8), p.927-944
• Main Authors: Kokorin, A. I., Travin, S. O., Kolbanev, I. V., Degtyarev, E. N., Borunova, A. B., Vorobieva, G. A., Dubinsky, A. A., Streletskii, A. N.
• Format: Article
• Language: English
• Subjects: Atoms and Molecules in Strong Fields; Binary mixtures; Bismuth trioxide; Boron oxides; Gareth Eaton: on the Occasion of His 80th birthday; Indium oxides; Investigations; Laser Matter Interaction; Metal oxides; Mixed oxides; Molybdenum; Organic Chemistry; Original Paper; Phase transitions; Physical Chemistry; Physics; Physics and Astronomy; Rate constants; Solid State Physics; Spectra; Spectroscopy/Spectrometry; Temperature; Titanium dioxide; Vanadium pentoxide
• ISSN: 0937-9347; 1613-7507
• DOI: 10.1007/s00723-021-01314-5

Seven binary mixed oxides of V 2 O 5 , MoO 3 , TiO 2 , B 2 O 3 , Bi 2 O 3 , In 2 O 3 , and Tm 2 O 3 , in which V 2 O 5 is a permanent component, were prepared by the method of mechanochemical activation (MCA). All composites have been investigated using EPR spectroscopy, X-ray diffraction, BET analysis and EPR spectra calculations. The results obtained were compared with those for individual V 2 O 5 powder. The kinetic of structural transformations occurring in these binary mixtures under MCA were quantitatively characterized using a developed program of EPR spectra analysis. These structural rearrangements are fitted well by the first-order rate constants. Influence of the oxide nature mixed with vanadium pentoxide, the ratio of the components and time of milling on these transformations are discussed.