Vanadium Pentoxide Nanowires: Hydrothermal Synthesis, Formation Mechanism, and Phase Control Parameters

Large-scale orthorhombic V2O5 single-crystalline nanowires with diameters of 60–80 nm and lengths of up to hundreds of micrometers, which is by far the longest reported one-dimensional nanostructure of vanadium oxide fabricated, were synthesized by a template-free mild and direct hydrothermal reaction between VOSO4·xH2O and KBrO3. The formation mechanism of the as-obtained orthorhombic V2O5 nanowires is briefly discussed. Several parameters, such as pH value in the solution, reaction temperature, and kinds of oxidants, are believed to play an important role in the phase of the final products.