07.La0.67Sr0.33Mn0.7Fe0.3O3的制备及其光催化性能研究

董 平， 王正德

（内蒙古科技大学化学与化工学院，内蒙古包头，014010）

摘要：采用溶胶—凝胶燃烧法制备了纳米级钙钛矿型复合氧化物La_0.67Sr_0.33Mn_0.7Fe_0.3O₃，通过XRD、SEM对样品的物相和形貌进行表征，结果表明所得La_0.67Sr_0.33Mn_0.7Fe_0.3O₃样品为钙钛矿结构，直径约为50纳米，长度为1微米。以350W氙灯做光源，催化降解亚甲基蓝水溶液，反应6h，降解率达到96%。

关键词：钙钛矿锰氧化物；溶胶凝胶燃烧法；亚甲基蓝；光催化

中图分类号：O643    文献标识码：A

The preparation of La_0.67Sr_0.33Mn_0.7Fe_0.3O₃and the study of its photocatalytic performanceDONG Ping，WANG Zheng-de

（Chemistry and Chemical Engineering School , InnerMongolia University of Science & Technology, Baotou 014010, China）

Abstract：Nano-sized perovskite type composite oxide La_0.67Sr_0.33Mn_0.7Fe_0.3O₃was synthesized by sol-gel combustion method.Morphology andstructure of the prepared powder were characterized by XRD and SEM.The results showthat La_0.67Sr_0.33Mn_0.7Fe_0.3O₃was perovskite structure (ABO₃), with its grain diameter being about50nm at the length of 1 micron. With 350w xenon lamp aslight source, reacting in the catalytically degraded blue solution methylenefor 6 hours, the degradation rate reached 96%.

Keywords：Perovskite manganite; sol-gel combustion method ; methyleneblue ; photocatalysis