Characterization and photocatalytic properties of Ni-doped Sr10Bi6O24−y

The compound Sr10Bi6O24−y doped with Ni was prepared by solid-state reaction method. The obtained powders were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), UV-vis diffuse reflectance spectra and X-ray photoemission spectra (XPS). The Ni-doped Sr10Bi6O24−y samples assume a cubic perovskite structure with space group Fm3m (2 2 5). Bi in Sr10Bi6O24−y exists in the valence state of Bi(II). Photocatalytic activities of the prepared samples were evaluated using acid red G as a model organic compound. The results show that doping with 0.5 wt.% Ni can significantly improve the photoactivity of the compound Sr10Bi6O24−y.