Synthesis, Characterization and Catalytic Properties of Perovskite LaFeO3 Nanoparticles

4th International Conference on Science & Engineering in Mathematics, Chemistry and Physics 2016

数学;化学;物理学

Afifah, Nur^1,2 ; Saleh, Rosari^1,2

Departemen Fisika, Fakultas MIPA, Universitas Indonesia, Depok

16424, Indonesia^1

Integrated Laboratory of Energy and Environment, Fakultas MIPA, Universitas Indonesia, Depok

16424, Indonesia^2

关键词: Catalytic properties;    Coprecipitation method;    Diffuse reflectance spectroscopy;    Energy dispersive x-ray;    Field emission scanning electron microscopes;    Orthorhombic structures;    Perovskite type oxides;    Vibrating sample magnetometer;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/710/1/012030/pdf
DOI  :  10.1088/1742-6596/710/1/012030

来源: IOP

【 摘 要 】

Orthorhombic structure of rare earth perovskite-type oxide LaFeO3nanoparticles with light absorption properties in the visible range was prepared by co-precipitation method. The prepared nanoparticles was characterized by several measurements such as X-ray diffraction, energy dispersive X-ray, field emission scanning electron microscope, diffuse reflectance spectroscopy, vibrating sample magnetometer and electron spin resonance spectroscopy. Methylene blue was taken as the model pollutant to evaluate its photocatalytic, sonocatalytic, photosonocatalytic degradation in the presence of LaFeO3nanoparticles. The degradation of methylene blue followed the pseudo-first order model in all three processes. The observed rate constants indicate that the photosonocatalytic was faster than the respective individual. Radical scavenger experiments revealed that holes were the predominant oxidative species involved in all three processes.