Background: As a relatively novel and promising method, the bubble electrospinning is to fabricate continuous and uniform nanowires using an aerated polymer solution in an electric field. A large number of oxidized docking nanowires were established on a silicon substrate using the bubble electrospinning, and then using tungsten oxide ammonium (AMT) as an appropriate calcined air with the WO3 sources. WO3 production can enhance its catalytic activity, stability, and can raise its rhodamine B degradation rate as well, its wide applications have prospected.
Method: The high aspect ratio of WO3 nanowires is successfully prepared by a lightweight bubble electrospinning technique using polyoxyethylene (PEO) and ammonium-tungstate(AMT) as the WO3 precursor after annealing in air at 400, 450 and 500°C, respectively. The products were characterized by SEM, FTIR, XRD, and TG analysis.
Results: The results were shown that the diameter of WO3 nanowires ranges from 2μm to 450nm, which varies with the calcination temperature. XRD diffraction and infrared spectroscopy showed that monoclinic crystals were prepared at different calcination temperatures (400, 450 and 500°C). In addition, the UV–vis diffuse reflectance spectroscopy showed that the fiber had a band gap energy of 2.63 eV after calcination at 450 ◦C, showing excellent photocatalytic activity in the degradation of RhB at 245 nm.