SYNTHESIS AND STRUCTURE OF NANOCRYSTALLINE COPPER SULFIDES WITH DJURLEITE AND COVELLITE STRUCTURES

Method of chemical deposition from water solutions of copper nitrate and sodium sulphide, and also from water solutions of copper nitrate with use thiocarbonic acid diamide as sulfidizer in the presence of Trilon stabilizer are synthesized nanocrystalline powders of copper sulfides with structures of covellite and diurleite. It is established, that as a result of sulfidization of copper nitrate by sodium sulphide forms powders of copper sulfides with the particle size of 3–6 nanometers having structure of hexagonal covellite and also monoclinic diurleite CuS with small nonstoichiometry of copper sublattice. Deposition from poorly alkaline water solutions of copper nitrate, thiocarbonic acid diamide and Trilon with heating to temperature ~90–100°C would allow to receive nanocrystalline powders CuS with the particle size of 45–55 nanometers having structure of hexagonal covellite.