SYNTHESIS OF NANO- AND ULTRADISPERSE COPPER POWDERS BY CEMENTATION OF COPPER (II) IONS BY THREE-VALENT TITANIUM IONS

The process of cementation of copper (II) ions by tri-valent titanium ions is considered. The consistent patterns of the formation of nano-and ultra-disperse copper powders as a result of the interaction of copper (II) ions with titanium (III) ions have been established. It was demonstrated that during the reaction atomic copper is formed, the particles of which are combined with the formation of fine aggregates of certain sizes, which are stabilized in the form of spheres. In the course of the research, the possibility of obtaining titanium (III) sulfate, which is necessary for carrying out the cementation of copper (II) ions, is shown in an inexpensive, simplified way and the results of studying the influence of various parameters on this process are presented. The possibility of regeneration of tetra-valent titanium ions formed as a result of the reaction using an electrolyzer equipped with an anion exchange membrane is demonstrated. The effect of the initial concentration of copper ions (II) and titanium ions (III) on the formation of copper powder was studied. The shapes and sizes of the obtained copper powders were determined using an electron microscope. The constant of the reversible oxidation-reduction reaction was calculated and it was established that copper (II) ions contained in the solution are almost completely formed as nano-scale copper powders. A schematic diagram of the technology for the production of fine copper powders, corresponding to the requirements of modernity, is proposed.