标题：Photocatalytic degradation of methylene blue by magnetically recoverable Fe3O4/Ag6Si2O7under simulated visible light
作者：Chen, Huiping ;Chen, Nan ;Gao, Yu ;Feng, Chuanping
作者机构：[Chen, Huiping ;Chen, Nan ;Feng, Chuanping ] School of Water Resources and Environment, China University of Geosciences (Beijing), Beijing; 100083, Ch 更多
摘要：Methylene blue (MB), a typical industrial dye, causes undesirable water pollution and is a serious concern in aquaculture industries. In this study, Fe3O4/Ag6Si2O7photocatalyst was prepared to remove MB from water under simulated visible light. The Fe3O4/Ag6Si2O7composites were fabricated via anchoring Ag6Si2O7nanoparticles on the surface of spherical Fe3O4by precipitation process. Various parameters of reaction were tested in batch experiments, including mass ratio of Fe3O4, catalyst dosage, initial MB concentration and solution pH. It can be observed that 98% of MB could be degraded under optimum conditions and the Fe3O4/Ag6Si2O7composite performed commendably from pH 2.0 to 10.0. Reactive species trapping experiments revealed that the superoxide radical (·O2−) played a prominent part in the photo-degradation mechanism. Some intermediate products produced during the degradation process were also detected. The magnetic properties and high photocatalytic activity of Fe3O4/Ag6Si2O7particles make it promising employed for practical application in water treatment.
© 2017 Elsevier B.V.