以V2O5, AgNO3和Y(NO3)3×6H2O为原料、十二烷基苯磺酸钠为辅助剂，采用直接沉淀法和浸渍法制备单斜晶相Ag3VO4和Y2O3/Ag3VO4复合催化剂，表征了产物的结构和形貌，并分析了其形成机理；在可见光下研究了其催化可见光降解罗丹明B(RhB)的性能. 结果表明，所得Y2O3/Ag3VO4复合催化剂吸收边相对纯相Ag3VO4发生红移，禁带宽度减小至1.83 eV，电子-空穴对复合几率降低，对RhB有较好的可见光催化活性和稳定性，可见光照射15 min后，0.08 g 3% Y2O3/Ag3VO4催化200 mL 8 mg/L RhB溶液的降解率达94.2%.

Ag3VO4 and Y2O3/Ag3VO4 photocatalysts were synthesized by precipitation and impregnation with the assistant of sodium dodecylbenzene sulfonate (SDBS), and V2O5, AgNO3 and Y(NO3)3×6H2O as raw materials, their structure and morphology characterized, and the synthesis mechanism was analyzed. The results showed that the absorption edge of Y2O3/Ag3VO4 was red-shifting, and the energy gap was 1.83 eV with SDBS assistance. The synthesized Y2O3/Ag3VO4 showed excellent photocatalytic activity and stability for degradation of rhodamine B (RhB) because of the adsorption enrichment of benzene and effective separation of photogenerated electron-hole pair. The degradation rate of 8 mg/L RhB in 200 mL solution was 94.2% by 0.08 g 3%Y2O3/Ag3VO4 in 15 min illumination.