采用溶剂热-沉淀法制备BiOI负载Fe3O4的新型可见光催化剂BiOI/Fe3O4,并通过X射线衍射(XRD)和扫描电镜(SEM)对BiOI/Fe3O4进行表征分析.实验结果表明:金橙Ⅱ的降解率随着初始过硫酸盐(PS)浓度和催化剂浓度的增大而增大.但当PS浓度、催化剂质量浓度分别增大到0.5 mmol/L、0.5 g/L时,降解率随着两者浓度的增大而降低.随着初始pH的增大,金橙Ⅱ的降解速率逐渐降低.此外,自由基淬灭剂异丙醇和叔丁醇的加入,证明了该体系主要的活性自由基是羟基自由基(·OH)和硫酸根自由基(SO4·-).%The new BiOI supported Fe3O4 visible light photo?catalyst,BiOI/Fe3O4,has been synthesized by a solvo?thermal?deposition method,and characterized&analyzed with X?ray diffraction(XRD)and scanning electron mi?croscopy(SEM). The results show that the degradation rate of orangeⅡ increases with the increase of PS initial concentration and catalyst concentration. However ,when the PS concentration and catalyst concentration are in?creased to 0.5 mmol/L and 0.5 g/L,respectively,the degradation rate decreases with the increase of the concentra?tion of both. With the increase of the initial pH,the degradation rate of orangeⅡdecreases gradually. Further?more,the addition of free radical quenching agents isopropanol and tert butyl alcohol has proved that the main ac?tive radicals of the system are ·OH and SO4·-.
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