Effect of doping of different rare earth（europium,gadolinium,dysprosium and neodymium） metal ions on structural,optical and photocatalytic properties of LaFeO3 perovskites  

作　　者：Manisha Dhiman Sonal Singhal 

机构地区：[1]Department of Chemistry,Panjab University

出　　处：《Journal of Rare Earths》2019年第12期1279-1287,共9页稀土学报（英文版）

基　　金：Project supported by Council of Scientific and Industrial Research(CSIR)((01(02833)/15/EMR-Ⅱ));DST Purse Grant-Ⅱand University Grants Commission(UGC)

摘　　要：Different rare earth substituted perovskites LaRExFe1-xO3(where RE=Eu3+,Gd3+,Dy3+,Nd3+and x=0.02,0.04,0.06,0.08,0.1)with orthorhombic structure and narrow band gaps were successfully fabricated via sol-gel autocombustion method.All the substituted perovskites are found to exhibit excellent photocatalytic activity towards the oxidative degradation of dye molecules.An excellent increase in the rate constant values of pure perovskite(LaFeO3)photocatalytic reactions is observed with the substitution of rare earth metal ions.Best results are obtained for LaNd0.1Fe0.9O3 which exhibits around 7 times increase in the rate constant values for degradation reaction of SO(1.76×10-1 min-1)and RBY(1.69×10-1 min-1)dyes.Different rare earth substituted perovskites LaRExFe1-xO3(where RE=Eu3+,Gd3+,Dy3+,Nd3+and x=0.02,0.04,0.06,0.08,0.1) with orthorhombic structure and narrow band gaps were successfully fabricated via sol-gel autocombustion method.All the substituted perovskites are found to exhibit excellent photocatalytic activity towards the oxidative degradation of dye molecules.An excellent increase in the rate constant values of pure perovskite（LaFeO3） photocatalytic reactions is observed with the substitution of rare earth metal ions.Best results are obtained for LaNd0.1Fe0.9O3 which exhibits around 7 times increase in the rate constant values for degradation reaction of SO(1.76×10-1 min-1)and RBY(1.69×10-1 min-1) dyes.

关 键 词：Rare earth substitution Perovskites Sol-gel autocombustion STRUCTURAL properties Photocatalysis 

分 类 号：O61[理学—无机化学]