采用水热法制备 Bi2 WO6-NiFe2 O4磁性可见光催化剂。利用X射线衍射(XRD)、紫外-可见漫反射光谱(DRS)、扫描电子显微镜(SEM)和磁学性质测量系统(MPMS)对所合成材料进行分析和表征。最后以罗丹明B(RhB)为目标污染物,考察不同p H 值条件下,Bi2 WO6-NiFe2 O4复合可见光催化剂对污染物的降解效率。结果表明,罗丹明 B 溶液 pH 值为5时, Bi2 WO6-NiFe2 O4具有最大降解效率2 h 达98％。 Bi2 WO6-NiFe2 O4在外加磁场下能快速的从溶液中分离。
Magnetic Bi2 WO6-NiFe2 O4 visible-light photocatalyst was successfully synthesized by a simple hydro-thermal method.The as-prepared photocatalysts were characterized by X-ray diffraction (XRD),UV-Visible diffuse reflectance spectra (UV-Vis DRS),scanning electron microscopy (SEM)and magnetic property meas-urement system(MPMS).The photocatalytic activities of the photocatalyst were evaluated by degradation of Rhodamine B (RhB)in aqueous solution under visible light at different pH value.The results demonstrated that the highest RhB degradation rate (>98%)was achieved by Bi2 WO6-NiFe2 O4 photocatalyst when the pH was 5. Bi2 WO6-NiFe2 O4 photocatalyst can be easily separated from solution using an external magnetic field.
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