中文摘要：

采用7-Fe2〇3掺杂对La/Bi2W06进行改性。通过超声-水热法合成出粒径在0.2-1.0|jun,表面附着7_Fe203球形颗粒的La/Bi2W06纳米片状的磁性7-Fe203/La/Bi2W06复合光催化剂。结合XRD、SEM等表征手段对复合材料的组成、形貌、光学性质进行表征，通过光催化降解罗丹明B溶液对其光催化性能进行评价。结果表明:7_Fe2〇3/La/Bl2W06复合光催化剂可以通过外磁场作用很容易的与反应溶液分离,且仍具有较高的可见光催化活性和稳定性，其重复使用3次后，对罗丹明B的降解率变化不明显，仍达到95.3%。

英文摘要：

The magnetic7-Fe203/La/Bi2W06composite photocatalysts were successfully synthesized by a simple ultrasound-hydro-thermal route.The crystalline structures,morphologies and optical properties of the7-Fe2〇3/La/Bi2W06composite photocatalysts were characterized by X-ray powder diffraction and scanning electron microscope.The7-Fe203/La/Bi2W06nanosheets with average diameters of0.2-1.0jjim are constructed by La/Bi2W06nanosheets,which are decorated by^/-Fe203nanoparticles.The photocata-lytic activities of the7-Fe2〇3/La/Bi2W06products were evaluated via the photodegradation of rhodamine B solution under visible-light radiation.The results showed that the7-Fe2〇3/La/Bi2W06composite photocatalysts can be easily separated from the reaction solution by external magnetic field,and the composite photocatalyst has high visible light catalytic activity and stability,after the composite photocatalysts were used3times,the degradation rate of rhodamine B change is not obvious,can still be reached95.3%This kind of composite photocatalysts with easiness of separation can have potential applications in water treatment and environmental cleaning.