Physics and chemistry of solution combustion synthesis of zinc oxide nanopowder from zinc nitrate-urea reagents

In this work, the possibility of obtaining ZnO nanopowder based on the use of the process of Solution Combustion Synthesis (SCS) as one of the simplest and most energy-saving methods for the synthesis of nanomaterials by conducting a self-sustaining exothermic redox reaction of a mixture of reagents dissolved in water was studied. A thermodynamic analysis was carried out with a calculated determination of the adiabatic reaction temperatures and the possible equilibrium composition of the synthesis products. Based on the analysis of known data on the mechanism and stages of solution combustion synthesis of various oxides, a scheme for the chemical stages of the formation of zinc oxide in the zinc nitrate-urea system was proposed.