Effect of the Synthesis Method, Complexing Agent and Solvent on the Physicochemical Properties of LaNiO3 Nanopowders

LaNiO3 nanopowders are synthesized by sol–gel and sol-gel combustion methods using citric acid, ascorbic acid and sucrose as chelating agents, and ethanol and water as solvents. The precursor thermal decomposition towards the final solid was analyzed by X-ray diffraction, differential thermal analysis and thermogravimetric techniques which were also used to provide the adequate temperature of calcination (800and#176;C) for achievement of the final perovskite. After calcination, the nanocomposites were characterized by powder size distribution, Fourier transform infrared spectroscopy and X-ray diffraction.