Synthesis and characterization of LaMnO3 nanoparticles by a simple modified sol-gel route (Thai)

Abstract

This paper reports the synthesis of LaMnO3 nanoparticles by a simple, modified sol-gel route using
chitosan solution, lanthanum nitrate hexahydrate and manganese (II) nitrate hydrate as starting materials.
The polymeric precursor was characterized by TG-DTA to determine the thermal decomposition and it was
then calcined at different temperatures of 600, 700, 800 and 900 ^oC for 3 h to obtain LaMnO3 nanoparticles.
The calcined samples were characterized by XRD, FT-IR, TEM, SEM and VSM. The synthesized nanoparticles
are spherical with a particle size of ~15-50 nm, as revealed by SEM and TEM. The XRD, FTIR and selected
area electron diffraction results indicate that the synthesized LaMnO3 nanoparticles formed aperovskite structure