Self-assembly of Sb2O3 nanowires into microspheres: Synthesis and characterization

Sb2O3 nanowires with diameters of ∼233 nm and microspheres assembled by these nanowires were successfully synthesized by a simple poly-(vinylpyrrolidone) (PVP) assisted hydrothermal method. The morphologies, nano/microstructures and optical properties of the as-grown nanowires and microspheres were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM) and UV-vis diffuse reflection spectrum. It has been found that the experimental parameters, such as mineralizers, played crucial roles in the morphological control of Sb2O3 nanowires. The possible growth mechanism of microspheres has been proposed. -- Research highlights: → Sb2O3 nanowires and microspheres were successfully synthesized using a hydrothermal method. → Morphologies and properties of the as-grown nanowires and microspheres were characterized. → Possible growth mechanism of microspheres has been proposed.