CdS/YFeO3新型磁性可见光催化剂的制备和性能研究

采用共沉淀法,以Cd(NO_3)_2、二甲亚砜、Y_2O_3,HNO_3,Fe(NO_3)_3和柠檬酸为原料合成一系列不同掺杂比例的CdS/YFeO_3复合磁性光催化剂.用差热-热重、紫外可见漫反射、X射线衍射等技术对光催化剂进行了表征.X射线衍射结果表明CdS/YFeO_3复合磁性光催化剂制备成功.由差热-热重结果可知,CdS/YFeO_3复合磁性光催化剂的热稳定性高于纯CdS.紫外可见漫反射结果表明,Cd S/YFeO_3复合磁性光催化剂在紫外和可见光区的吸光度都比纯CdS大.通过罗丹明B的降解反应评价了该类光催化剂的活性.结果表明,CdS/YFeO_3的比例对光催化活性有明显影响.光催化循环实验结果显示,CdS/YFeO_3复合磁性光催化剂具有良好的回收性,首次回收率为92.08%.

Preparation and Photocatalytic Performance of Composite Magnetic Photocatalysts CdS/YFeO3

Using cadmium nitrate, dimethyl sulfoxide, antimony trioxide, nitric acid, ferric nitrate and citric acid as raw materials, a series of CdS/YFeO₃ composite magnetic photocatalysts have been synthetized by co-precipitation method. They are been characterized by TG-DTA, UV-vis diffuse reflection, FL XRD and UV-vis. The TG-DTA results show that thermal stability of CdS/YFeO₃ composite magnetic photocatalyst is higher than of CdS. The uv-vis diffuse reflection tests prove that the absorbance of composite magnetic photocatalysts is increase than of pure CdS. The FL and XRD show that the synthetic catalysts are the target catalyst. The activity of the composite magnetic photocatalysts has been examined by catalytic degrading rhodamine B solution under visible light irradiation, which show that the photocatalysts have good catalytic activity. The material proportion of CdS and YFeO₃ significantly affects the photocatalytic activity of the photocatalysts. By the cycle and recovery experiment, the magnetic photocatalysts reveal a good repeatability and recovery, the recovery rate of catalysts is 92.08%.