| Abstract: | Zr~(4+) doped Bi_2WO_6 was prepared by a fast microwave-assisted hydrothermal method and used for photocatalytic degradation of organic dyes. The as-prepared samples were characterized by X-ray diffraction(XRD), transmission electron microscopy(TEM) and UV-Vis spectroscopy. The results indicate that cell volume of Bi_2WO_6 has a slight increase dependent on the substitution of W6+ by Zr~(4+) with increasing the Zr doping amount. The photocatalytic performance of Zr~(4+) doped Bi_2WO_6 was evaluated by the photodegradation of MO under visible light irradiation. Compared with samples obtained with traditional hydrothermal method as well as pure Bi_2WO_6, an obviously improved photocatalytic efficiency of Zr~(4+) doped Bi_2WO_6 is achieved by this microwave-assisted hydrothermal way. The 3% Zr doped Bi_2WO_6 sample exhibited the best photocatalytic activity, which is probably because of the appropriate proportion of components and optimum amount of oxygen vacancies of the sample. |
