NANOSYSTEMS: PHYSICS, CHEMISTRY, MATHEMATICS, 2020, 11 (5), P. 572–577
Synthesis of nanostructured hollow microspheres of vanadium (III, V) oxides
E.V. Vladimirova – Institute of Solid State Chemistry, Ural Branch, Russian Academy of Sciences, Pervomayskaya, 91, Yekaterinburg, 620990 Russia; Vladimirova@ihim.uran.ru
O. I. Gyrdasova – Institute of Solid State Chemistry, Ural Branch, Russian Academy of Sciences, Pervomayskaya, 91, Yekaterinburg, 620990 Russia; gyrdasova@ihim.uran.ru
A.V. Dmitriev – Institute of Solid State Chemistry, Ural Branch, Russian Academy of Sciences, Pervomayskaya, 91, Yekaterinburg, 620990 Russia; av.dmit.10.10@gmail.com
Vanadium oxides V2O5 and V2O3 have been synthesized by ultrasonic spray pyrolysis in the form of nanostructured spherical agglomerates with an average diameter of 0.5–1.5 μm. By changing the synthesis conditions, the vanadium oxidation state and microspheres surface morphology can be varied. The microspheres of V2O5 are formed during aerobic synthesis, while V2O3 microspheres are produced under an atmosphere of argon. An increase in the concentration of the initial solution leads to an increase in both size of V2O5 nanoparticles and the diameters of the V2O5 microspheres. Long-term storage of V2O3 in air results in morphological degradation of the microspheres.
Keywords: nanostructured microspheres, ultrasonic spray pyrolysis, solutions, vanadium oxides.
DOI 10.17586/2220-8054-2020-11-5-572-577
