Fabrication and characterization of visible-light-induced photocatalyst Gd2O3/Ag3VO4

摘要

Gd2O3/Ag3VO4 photocatalysts are synthesized through the impregnation method and characterized by powder X-ray diffraction (XRD), X-ray photo-electron spectroscopy (XPS), scanning electron microscopy (SEM) and UV-vis diffuse reflectance spectra (DRS). It is shown that Gd~(3+) is dispersed on the surface of Ag3VO4 in the form of Gd2O3. The DRS analysis indicates that the ability of visible-light absorption of Gd2O3/Ag3VO4 catalysts is enhanced greatly. The pho-tocatalytic activities of the samples are evaluated by degradation of Rhodamine B dye under UV and visible-light irradiation, respectively. The experimental results show that the role of Gd2O3 content has a significant impact on the photocatalytic activities of the samples. The mechanism of enhanced photocatalytic activity after the Gd introduction is discussed.