摘要
采用凝胶-燃烧法制备稀土单钙钛矿型LaNiO_3和双钙钛矿型La_2NiFeO_6光催化剂,利用X射线衍射、BET、红外光谱、扫描电镜进行了表征,并在可见光下以亚甲基蓝为模拟降解物进行了光催化研究。结果表明:钙钛矿LaNiO_3的结构是斜方六面体,而双钙钛矿La_2NiFeO_6的结构是立方体;La_2NiFeO_6的光催化活性高于LaNiO_3,这与二者之间的结构和表面性质的差异有关。
Rare-earth perovskite-type oxides LaNiO3 and double perovskite-type oxides La2NiFeO6 were prepared by gel-combustion process and characterized by XRD,BET,FT-IR and SEM.The powders were investigated as photocatalysts for methylene blue degradation under visible light.Experimental results demonstrated that the perovskite structure of LaNiO3 was rhombohedron and the double perovskite structure of La2NiFeO6 was cubic.The photocatalytic activity of La2NiFeO6 was much higher than that of LaNiO3,results from the difference in structure and surface properties between La2NiFeO6 and LaNiO3.
基金
江西省教育厅科学技术研究项目(GJJ14787)
江西省教育厅科学技术研究项目(GJJ13786)
