Abstract
The δ-Bi2O3-structural Bi11VO19 nanoparticles with the average size of ∼70nm were fabricated through the Pechini method for a possible photocatalytic application. The crystal structure was investigated by X-ray powder diffraction (XRD) and the structural refinement. The as-synthesized sample was also characterized by scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS), energy dispersive X-ray spectroscopy (EDX), UV–vis spectroscopy and photoluminescence measurements. The experimental results demonstrate that Bi11VO19 nanoparticles have an efficient visible light absorption with band-gap energy of 2.23eV. The photocatalytic activity was evaluated by the photodegradation of the methylene blue (MB) under visible light irradiation (λ>420nm) as a function of time. All the results indicate that Bi11VO19 could be a potential photocatalyst driven by visible-light. The effective photocatalytic activity was discussed on the base of the crystal structure characteristic.
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