采用光沉积法分别将Ag和MnO_x有选择地负载到WO₃/g-C₃N₄复合光催化剂的g-C₃N₄和WO₃表面，制备出双助剂共同改性的Ag-MnO_x/WO₃/g-C₃N₄复合光催化剂，通过XRD、TEM、FT-IR、DRS对样品进行表征，考察了Ag-MnO_x/WO₃/g-C₃N₄在光催化降解罗丹明B （RhB）溶液的光催化活性。结果表明，Ag沉积在g-C₃N₄表面，MnO_x沉积在WO₃表面，有效地促进了光生电子和空穴的分离，在光催化降解测试中，Ag-MnO_x/WO₃/g-C₃N₄的降解速率是WO₃/g-C₃N₄的1.87倍，且比负载单助剂的WO₃/g-C₃N₄ NS和浸渍法制备的复合光催化剂降解速率更高。

Ag-MnO_x/WO₃/g-C₃N₄ composite photocatalyst that are modified by dual-auxiliaries is prepared via photo-deposition method supporting selectively Ag and MnO_x onto the surface of WO₃/g-C₃N₄ NS.The prepared samples are characterized by XRD,TEM,FT-IR and DRS.The photocatalytic activities of Ag-MnO_x/WO₃/g-C₃N₄ are evaluated through photocatalytic degrading Rhodamine B.Results indicate that Ag is deposited on the surface of g-C₃N₄ and MnO_x is deposited on the surface of WO₃ successfully,which promotes effectively the separation of photogenerated electrons and holes.In the experiment of photocatalytic degradation,the degradation rate over Ag-MnO_x/WO₃/g-C₃N₄ NS is 1.87 times that over WO₃/g-C₃N₄ NS.Ag-MnO_x/WO₃/g-C₃N₄ NS derives higher degradation rate than both WO₃/g-C₃N₄ NS that is modified by single auxiliary and the composite photocatalyst prepared by impregnation method.

杨泽斌(1991-),男,硕士研究生,主要从事光催化降解的研究工作,yangzebin@tju.edu.cn