采用微波溶剂热法制备了α-Bi2Mo3O12和γ-Bi2Mo O6可见光催化剂,并用XRD、SEM、和UV-Vis等测试手段表征了试样的结构和性能,最后以氯胺磷为目标降解物考察了它们的可见光催化降解性能.结果显示,在p H值较低时产物为α-Bi2Mo3O12,p H较高时产物为γ-Bi2Mo O6,并探讨了不同产物的形成机理.光催化实验结果表明,γ-Bi2Mo O6的可见光催化活性优于α-Bi2Mo3O12;在氯胺磷初始浓度较低时,γ-Bi2Mo O6光催化降解过程符合零级动力学反应模型.在酸性或碱性条件下γ-Bi2Mo O6对氯胺磷的降解效果优于中性条件. The α-Bi2Mo3O12 and γ-Bi2MoO6 visible light catalysts were prepared by microwave solvothermal method. The structure and properties of the samples were characterized by XRD, SEM and UV-Vis. Finally, The results show that the product is α-Bi2Mo3O12 when the value of p H is lower and γ-Bi2Mo O6 is the product when p H is higher, and the formation mechanism of different products is discussed.The photocatalytic results show that, The catalytic activity of γ-Bi2Mo O6 is better than that of α-Bi2Mo3O12. When the initial concentration of chloramphenicol is low, the photocatalytic degradation of γ-Bi2MoO6 accords with the zero-order kinetic model. Under acidic or alkaline conditions, γ-Bi2Mo O6 degradation of chloramphenin than the neutral conditions.