PRELIMINARY STUDY OF PEROVSKITE-TYPE LaFeO3 AS SUPPORTING GOLD METALLIC PARTICLES

LaFeO3 study has contributed to the advancement of new materials, because they are considered important for its technological and their eventual use physicochemical properties. Likewise, the use of gold particles supported on this kind of solid to modify these properties, generating potential applications. In this work we synthesized and characterized LaFeO3 type oxides for use as supports for gold particles. The materials were prepared by the sol-gel method (Pechini route), the microstructure was analyzed by X-ray diffraction (XRD) and found using BET surface area by N-2 fisiadsorcion, infrared spectroscopy and determined anion cations. The gold particles were deposited on the solid by deposition-precipitation method. Five samples were obtained LaFeO3 calcined at 700 degrees C, 750 degrees C, 800 degrees C, 850 degrees C and 900 degrees C. According to their characterization, it was found that the crystallinity and surface area of the materials showed an inverse relationship, which allowed to pick LaFeO3 (700 degrees C) and three support loads of gold (0,1 %; 0,3 %, 0,5%), and using XRD and chemical analysis for the presence of the noble metal. Finally, this study contributes to solid state research, highlighting the perovskite oxides as materials useful and versatile considering its property, which can be controlled by heat treatment. Thus the LaFeO3 treated at 700 degrees C, it draws attention as support metallic particles with heterogeneous catalytic interest.