Synthesis and characterization of V3O7H2O nanobelts
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G.S. Zakharovaa, , , V.L. Volkova, , Ch. Täschnerb, I. Hellmannb, A. Leonhardtb, R. Klingelerb and B. Büchnerb
aInstitute of Solid State Chemistry, Ural Division, Russian Academy of Sciences, Pervomaiskaya ul. 91, Yekaterinburg, 620041, Russia
bLeibniz-Institut für Festkörper- und Werkstoffforschung Dresden, Helmholtzstr. 20, D-01069 Dresden, Germany
Received 23 July 2008;
revised 19 January 2009;
accepted 1 February 2009.
by E.L. Ivchenko.
Available online 10 February 2009.
V 3O7H2O nanobelts were prepared by a hydrothermal method at 190 C using V 2O5nH2O gel and H2C2O42H2O as starting agents. The nanobelts obtained have diameters ranging from 40 to 70 nm with lengths of up to several micrometers. Their morphology and structure have been characterized by XRD, SEM, TEM and IR spectroscopy. The effect of the annealing temperature on the morphology of the resulting product has been investigated. XRD and SEM showed that thermal annealing of the V 3O7H2O sample in air led to the collapse of the V 3O7H2O nanobelt structure and the convert into V 2O5 nanobelts. For the first time V 2O5 nanobelts with an ultrahigh aspect-ratio have been obtained in air. Furthermore, electrical conductivity and static magnetic susceptibility measurements have been carried out.
Keywords: A. Nanostructures; B. Chemical synthesis; C. Scanning and transmission electron microscopy