Paramagnetic Centers Created Under Mechanochemical Treatment of Mixed Molybdenum-Vanadium Oxides
- Authors: Kolbanev I.V.1, Degtyarev E.N.1, Streletskii A.N.1, Kokorin A.I.1
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Affiliations:
- N. N. Semenov Institute of Chemical Physics, Russian Academy of Sciences
- Issue: Vol 47, No 6 (2016)
- Pages: 575-588
- Section: Article
- URL: https://journals.rcsi.science/0937-9347/article/view/247470
- DOI: https://doi.org/10.1007/s00723-016-0778-4
- ID: 247470
Cite item
Abstract
Samples of individual and mixed vanadium-molybdenum (V:Mo) oxides xV2O5:(1-x)MoO3, 0 ≤ x ≤ 1, were prepared by the method of mechanochemical activation (MCA). The samples have been characterized by X-ray diffraction (XRD) and X-band electron paramagnetic resonance (EPR) spectroscopy. Prolongation of the treatment duration time in mills led to considerable increase in the V(IV) paramagnetic centers content as well as after additional high temperature annealing at 600 °C. Paramagnetic Mo(V) centers were recorded only in the case of MCA of individual MoO3 oxide. Complexity of the composition of mechanically activated mixed oxides was confirmed with the XRD data. It is shown that in the case of all individual and mixed oxides the content of paramagnetic species increases noticeably with the increase in milling time. The annealing at 600 °C after MCA of mixed oxides forms a new mixed phase of MoV2O8 composition.
About the authors
I. V. Kolbanev
N. N. Semenov Institute of Chemical Physics, Russian Academy of Sciences
Email: kokorin@chph.ras.ru
Russian Federation, Moscow, 119991
E. N. Degtyarev
N. N. Semenov Institute of Chemical Physics, Russian Academy of Sciences
Email: kokorin@chph.ras.ru
Russian Federation, Moscow, 119991
A. N. Streletskii
N. N. Semenov Institute of Chemical Physics, Russian Academy of Sciences
Email: kokorin@chph.ras.ru
Russian Federation, Moscow, 119991
A. I. Kokorin
N. N. Semenov Institute of Chemical Physics, Russian Academy of Sciences
Author for correspondence.
Email: kokorin@chph.ras.ru
Russian Federation, Moscow, 119991