【摘要】 水热法合成了Bi₂WO₆催化剂后,将Ag-Ag₂O负载在Bi₂WO₆上,制备出新型Ag-Ag₂O/Bi₂WO₆异质结光催化剂,通过XRD,SEM,TEM,UV-Vis DRS等一系列测试手段对光催化剂进行了形貌、结构、吸光性能等性质的表征,并以罗丹明B（Rh B）为目标污染物研究催化剂的光催化活性。结果表明制备的Ag-Ag₂O/Bi₂WO₆异质结光催化剂主体为立体花球状结构,直径约2μm,具有较大的比表面积,且对可见光的吸收范围有明显增加（从442红移至594nm）,催化活性亦高于未负载的Bi₂WO₆,反应120min后,Ag-Ag₂O/Bi₂WO₆对罗丹明B（Rh B）的降解率可达96.20%,在重复4次降解实验之后,其光催化活性虽然有一定损失,但光催化性能仍优于其余两组催化剂。更多还原

【Abstract】 Bismuth tungstate（Bi₂WO₆）microcrystalline prepared by a facile hydrothermal method was used to fabricate a new kind of Ag-Ag₂O/Bi₂WO₆ heterojunction catalyst.The structures and morphologies of Ag-Ag₂O/Bi₂WO₆ heterojunction catalysts were characterized by XRD,SEM,TEM and UV-Vis DRS.Photocatalytic performances of Ag-Ag₂O/Bi₂WO₆ were comparatively evaluated from measuring the degradation efficiency of Rhodamine B（RhB）aqueous solution.The results revealed that Ag-Ag₂O/Bi₂WO₆ heterojunction catalyst kept a 3Dflower-like structure with the average size of 2μm and had larger specific surface area as well.The degradation efficiency of Rh B had reached 96.2%in 120 min and the catalyst exhibited some loss of activity after 4cycles,but still had the best photocatalytic performance.更多还原