An oxides-hydrothermal approach from bulky V2O5 powder to V3O7.H2O nanoribbons or V3O7 nanoflowers in various ethanol/water mixed solvent

V3O7.H2O nanoribbons and V3O7 nanoflowers are firstly obtained via facile oxides-hydrothermal (O-HT) route. V2O5 bulk-phase powder is directly used as precursor. The 1:1 ethanol/water and absolute ethanol are made as solvent for obtaining nanomaterials of vanadium oxides with different morphologies and structures. Characterizations of the samples are carried out using XRD, TG, FTIR, Raman-Spectra, SEM, TEM, HRTEM, SAED, and UV-vis. The large-scale fine ribbon-like V3O7.H2O nanobelts with thickness ca. 20 nm and length ca. 20-40 μm are obtained in 1:1 (v/v) ethanol/water mixed solvent. The V3O7 nanoflowers are constructed by numerous whisker-like nanocrystal or petal-like are obtained in absolute ethanol solvent with the thickness about 20 nm and the size ca. 2-3 μm. The formation mechanism of the sample is discussed