关键词: Eu掺杂, BiVO4 , 水热法, 光催化

Abstract: Eu-doped bismuth vanadate（Eu/BiVO4） micro-nano material was synthesized by one step hydrothermal method. XRD，SEM，EDS，XPS，UV-Vis，DRS，and PL were employed to characterize the structures of the prepared products.The photocatalytic activities were measured by the degradation of RhB.The influences of main preparation conditions on the crystal phase of the products were studied.Results showed that the optimum prepared conditions were found as follows：amount-of-substance ratio of Bi3+ to V5+ was 1∶1，pH=4 for the precursor solution，hydrothermal temperature was 160 ℃，hydrothermal time was 20 h，the doping amount of Eu was 5%（amount-of-substance fraction）.The obtained product owned the monoclinic scheelite structure.After 1 h irradiation under visible light（200 W tungsten lamp） with the presence of H2O2，the samples showed relatively higher photocatalytic degradation rate of RhB by 89.2%，which was increased by about 30% than that of the pure BiVO4.

Key words: Eu-doping, BiVO4, hydrothermal method, photocatalysis