BiPO4/Ag3PO4/CNTs复合光催化剂的制备、表征及其光催化性能（英文）

Preparation, characterization and photocatalytic performance of BiPO4/Ag3PO4/CNTs composite photocatalysts

采用超声共沉淀法制备了一种新型BiPO4/Ag3PO4/CNT复合光催化剂。用SEM、DRS和PL对材料的形貌和表面缺陷进行了表征。结果表明,随着BiPO4和CNT含量的增加,Ag3PO4样品的吸收边带发生红移,吸收强度在450~700nm范围内增加。用亚甲蓝(MB)溶液模拟污染源,评价催化剂的活性。实验结果表明,当BiPO4和Ag3PO4的最佳摩尔比为5%时,光催化性能最佳。与Ag3PO4催化剂相比,cal-5-0.5-350具有更高的光催化活性。这可以归因于适当的Bi和CNT加入到Ag3PO4中可以增强材料的比表面积,增加材料对可见光的吸收,提高光生电子和空穴的分离效率,降低电子-空穴对的复合速率。

A novel composite BiPO4/Ag3PO4/CNTs photocatalyst was successfully prepared by ultrasonic assisted coprecipitation.The morphology and surface defects of the materials were characterized by SEM,DRS and PL.The results show that with the increase of BiPO4 and CNTs content,the absorption sideband of Ag3PO4 sample is red-shifted,and the intensity increases in the range of 450-700 nm.The catalyst activity was evaluated by simulating a source of pollution with a methylene blue(MB)solution.The test results reveal that the best photocatalytic performance is best when the optimum molar ratio of BiPO4 and Ag3PO4 is 5%.Cal-5-0.5-350 showed higher photocatalytic activity than the Ag3PO4 catalyst.It can be attributed to the fact that suitable Bi and CNTs incorporated into Ag3PO4 enhance materials specific surface area,increase the absorption of visible light by the material,promote the separation efficiency of photogenerated electrons and holes,and reduce the recombination rate of electron-hole pairs.