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

Large-scale orthorhombic V 2 O 5 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 VOSO 4 · x H 2 O and KBrO 3 . The formation mechanism of the as-obtained orthorhombic V 2 O 5 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.