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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%.
A series of CdS / YFeO_3 composite magnetic photocatalysts with different doping ratios were synthesized by coprecipitation method using Cd (NO_3) _2, dimethylsulfoxide, Y_2O_3, HNO_3, Fe (NO_3) _3 and citric acid as raw materials. The results of XRD show that the CdS / YFeO 3 composite magnetic photocatalyst has been successfully prepared. The results of differential thermal-thermogravimetric analysis show that the photocatalyst of CdS / YFeO 3 composite magnetic The thermal stability of photocatalyst is higher than that of pure CdS. The results of UV-Vis diffuse reflectance show that the absorbance of CdS / YFeO_3 composite magnetic photocatalyst is higher than pure CdS in the UV and visible region. The results showed that the ratio of CdS / YFeO_3 significantly affected the photocatalytic activity.The results of photocatalytic cycling showed that CdS / YFeO_3 composite magnetic photocatalyst has good recovery, the first recovery was 92.08%.