Fabrication of Bi-Doped TiO2 Spheres with Ultrasonic Spray Pyrolysis and Investigation of Their Visible-Light Photocatalytic Properties

Abstract EN

Bismuth-doped TiO2 submicrospheres were synthesized by ultrasonic spray pyrolysis.

The prepared bismuth-doped titania was characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), UV-visible diffuse reflectance spectroscopy (UV-vis DRS), and X-ray photoelectron spectroscopy (XPS).

Aqueous photocatalytic activity was evaluated by the decomposition of methyl orange under visible-light irradiation.

The results indicate that doping of bismuth remarkably affects the phase composition, crystal structure, and the photocatalytic activity.

The sample with 2% Bi exhibits the optimum photocatalytic activity.