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利用水热法合成了新型磁性γ-Fe_2O_3/BiOI纳米复合材料,并用X射线衍射(XRD)、扫描电子显微镜(SEM)、紫外可见漫反射(UV-Vis DRS)、能谱元素分析(EDS)、磁性表征(VSM)对其结构进行表征。通过在可见光下降解亚甲基蓝(MB),对其光催化性能进行评价,结果表明,5%γ-Fe_2O_3/BiOI磁性复合材料的光催化活性较好,60 min对MB的降解率达到97%。可在外加磁场的作用下实现快速分离与回收。光催化剂的回收循环实验表明,3次循环利用后对MB的光催化降解率仅小幅下降,说明其具有很好的重复稳定性。
A novel magnetic γ-Fe 2 O 3 / BiOI nanocomposite was synthesized by hydrothermal method and characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), UV-Vis DRS, EDS, , Magnetic characterization (VSM) to characterize its structure. The photocatalytic activity of 5% γ-Fe_2O_3 / BiOI magnetic composites was evaluated by degradation of methylene blue (MB) in visible light. The results showed that the photocatalytic activity of 5% γ-Fe_2O_3 / BiOI magnetic composites was good, and the degradation rate of MB was 97% after 60 min. Can be quickly separated and recovered under the action of an applied magnetic field. Photocatalyst recovery cycle experiments show that after three cycles of MB photocatalytic degradation rate decreased only slightly, indicating that it has good reproducibility.