WO_3/Bi_4V_2O_(11)复合光催化剂的制备及其光催化性能研究

Preparation and catalytic performance of WO_3/Bi_4V_2O_(11) compositephotocatalysts

WO_3/Bi_4V_2O_(11)复合光催化剂通过简单的溶剂热法成功制备.随后,复合材料的形貌、晶相结构和孔径分布等通过SEM、XRD和BET等技术进行表征分析.实验结果显示,WO_3/Bi_4V_2O_(11)复合材料的光催化性能均比纯的WO_3和Bi_4V_2O_(11)光催化活性好,此外,当WO_3和Bi_4V_2O_(11)的物质的量之比为1∶4时,光催化活性最佳,在70 min可见光照条件下能够将RhB降解完全.另外,WO_3/Bi_4V_2O_(11)表现出较高的稳定性,在三次循环实验后,复合光催化剂对RhB的降解率依然能够高达94%.我们还对WO_3/Bi_4V_2O_(11)光催化降解RhB的机理进行了研究.

WO_3/Bi_4V_2O_(11) composite photocatalystswere prepared via a simplesolvothermal method. Subsequently,the morphology,crystal structure and pore size distribution of the composites were characterized by SEM,XRD and BET techniques. The experimental results showthat the photocatalytic activity of WO_3/Bi_4V_2O_(11) composite is better than that of pure WO_3 and Bi_4V_2O_(11) photocatalysts. In addition,when the ratio of WO_3 and Bi_4V_2O_(11) is 1: 4,the photocatalytic activity was the best,and the degradation of RhB was complete at almost 70 min under visible light irradiation. Moreover,WO_3/Bi_4V_2O_(11) showed high stability,after three cycling experiments,the degradation rate of RhB could still reach as high as 94%. We also studied the photocatalyticmechanism of WO_3/Bi_4V_2O_(11) composite.