ZnFe_(2)O_(4)/Ag/TiO_(2)复合材料的制备及其光催化性能

Preparation and photocatalytic properties of ZnFe_(2)O_(4)/Ag/TiO_(2)composite

以硝酸银、钛酸四丁酯、无水氯化锌、六水氯化铁为原料,采用溶胶-凝胶法与溶剂热相结合的方法制备了ZnFe_(2)O_(4)/Ag/TiO_(2)复合材料,通过扫描电子显微镜、能谱分析仪、X射线粉末衍射仪、X射线光电子能谱仪、振动样品磁强计、紫外可见分光光度计对样品进行表征及测试。结果表明:ZnFe_(2)O_(4)/Ag/TiO_(2)-10具有最佳的光催化效果,在紫外和可见光下对染料的降解率都能达到90%以上,具有优异的紫外可见光光催化活性。ZnFe_(2)O_(4)/Ag/TiO_(2)具有独特的磁性,能在外部磁场作用下进行回收利用,这使其在实际应用中成为可能。通过磁分离技术重复回收利用5次后仍然保持优良的光催化性能,说明ZnFe_(2)O_(4)/Ag/TiO_(2)-10具有优异的磁性及较高的光催化循环稳定性。

ZnFe_(2)O_(4)/Ag/TiO_(2)composites were prepared with silver nitrate,tetrabutyl titanate,anhydrous zinc chloride,and ferric chloride hexahydrate as raw materials by sol‑gel and solvothermal methods.The samples were characterized and tested by scanning electron microscope,energy spectrum analyzer,X‑ray powder diffractometer,X‑ray photoelectron spectrometer,vibrating sample magnetometer,ultraviolet visible spectrophotometer.The results showed that ZnFe_(2)O_(4)/Ag/TiO_(2)‑10 had the best photocatalytic effect,and the degradation rate of dye can reach more than 90%under both ultraviolet and visible light.It had excellent ultraviolet/visible light photocatalytic activity.And after being compounded with ZnFe_(2)O_(4),ZnFe_(2)O_(4)/Ag/TiO_(2)had unique magnetism,which can be recycled under the action of external magnetic field,which makes it possible in practical application.Through magnetic separation technology,the photocatalysis performance of ZnFe_(2)O_(4)/Ag/TiO_(2)‑10 was still excellent after recycling for five times,which showed excellent magnetism and high photocatalytic cycle stability.