磁性Fe3O4/In2S3可见光催化剂的制备及其性能
Preparation，characterization and photocatalytic activity of magnetic visible-light-driven Fe3O4/In2S3 composites

采用简单的油浴法制备出磁性Fe3O4/In2S3可见光催化剂，利用XRD、 SEM、 FTIR、 BET、 UV-Vis DRS以及磁滞回线等手段对其进行表征，以可见光(λ≥ 420nm)为光源，以罗丹明B的光催化降解为模型反应，考察不同Fe3O4/In2S3复合比的磁性Fe3O4/In2S3可见光催化剂的催化性能及循环使用性能. 结果表明，当物质的量n(Fe3O4)与n(In2S3)之比为6∶5时制备的磁性Fe3O4/In2S3可见光催化剂具有最好的光催化活性. 光照90min后，罗丹明B的降解率高达96%；磁性Fe3O4/In2S3可见光催化剂的饱和磁化强度达10.31A·m2·kg-1，在外加磁场作用下，5s内可以快速从水相中分离，具有良好的磁分离效果；样品经3次循环使用后其催化活性基本保持不变.
Magnetic visible-light-driven Fe3O4/In2S3 composites were prepared by an oil-bath method. The synthesized samples were characterized by XRD，SEM，FTIR，BET，UV-Vis DRS and Hysteresis loop. The photocatalytic activity of the Fe3O4/In2S3 composites was evaluated by degradation of Rhodamine B in water under visible light (λ≥ 420nm) irradiation and cycle performance tests were also carried out. The results revealed that the highest Rhodamine B degradation of 96% within 90 min was achieved on Fe3O4/In2S3 sample when n(Fe3O4)∶n(In2S3)was 6∶5. The saturation magnetization value of Fe3O4/In2S3 composite was 10.31A·m2·kg-1. The Fe3O4/In2S3 composites exhibited excellent magnetic separation performance and could be separated from aqueous solution by an external magnetic field within 5 s. In addition，the photocatalytic activity of Fe3O4/In2S3 composites was almost unchanged after three-cycle photocatalytic test