Conclusion:
LaCoO3 perovskite nanoparticles can be produced by sol-gel auto-combustion, using a single step method. This method is low-cost, time-efficient and does not require advanced equipment for the production process. Investigation of the lattice structure, morphology, particle size by XRD, SEM and PSA analysis methods show that particles are uniform in shape and size and these characteristics play important roles in the application of nanoparticles as the catalyst and cause uniformity in the properties of the catalyst. The production of uniform size nanoparticles using this method is the result of the use of surfactants in the synthesis process. The results confirm the successful synthesis of LaCoO3 nanoparticles which are in a spherical shape and below 100 nm in size.