中文摘要：

以Bi（NO3）3·5H2O和NH4VO3为原料，采用水热法合成了BiVO4纳米颗粒，X射线衍射（XRD）表征结果显示所制备的BiVO4颗粒为单斜晶结构。紫外一可见漫反射（DRS）测定结果表明，BiVO4的禁带宽度为2．46eV。以罗丹明B为目标降解物，研究了样品在可见光下的光催化性能，最佳反应条件为：罗丹明B的初始质量浓度为10mg／L，催化剂投加量为3g／L。在最佳条件下，反应5h后，罗丹明B的脱色率为92．2％。动力学研究证明，该反应符合拟一级反应，动力学常数为0．497h-1。

英文摘要：

Nanometer BiVO4 particles were synthesized by hydrothermal method using Bi（NOa）a · 5H2O and NH4VO3 as raw materials. The BiVO4 was characterized by UV-vis DRS, XRD. The XRD pattern revealed that the BiVO4 shows monoclinic scheelite structure. UV-visible diffuse reflection spectra （DRS） indicated that the band gap of BiVO4 was 2.46 eV. The optimum condition is as follows：the original concentration of RhB, 10 mg/L; catalyst quantity, 3 g/L. The removal rate of RhB with BiVO4 in photocatalytic process for 5 h was 92.2 % under visible light. The reaction followed the preudo-first level kinetics model and the reaction rate constant was 0. 497 h-1.