Sol-Gel Synthesis of SrTiO₃Nanoparticles Using Acetic Acid as a Chelating Agent

Abstract

SrTiO3 nanoparticles were synthesized by sol-gel method using acetic acid as a chelating agent. Complete decomposition from thermogravimetric analysis occurred at 650°C. The –OH ligand should be gradually replaced by the acetyl group, slowing down the reactivity between the Ti and Sr cations. X-rays diffraction demonstrated only SrC2O4 with a small trace of anatase TiO2 between 400°C and 500°C. Perovskite peaks were observed starting at 600°C. The crystallite sizes were smaller at higher amount of acetic acid; this could be explained by retardation in the hydrolysis reaction. The nanoparticles were isotropic in shape with agglomeration due to partial sintering.