EXTRACTION METHOD OF OBTAINING NANODIMENSIONAL CRYSTALS OF METAL OXIDES Russian patent published in 2017 - IPC C01G3/02 C01G9/02 B82B3/00 B82Y30/00 

FIELD: nanotechnology.

SUBSTANCE: heterogeneous system, consisting of a water-soluble polymer and a phase-forming metal salt or an ammonium salt, is prepared in the distilled water to produce nanodimensional crystals of metal oxides by an extraction method. This forms a water-polymer and water-salt phase. An aqueous solution of the extracted metal sulphate, isolated from copper or zinc, is added to one of the phases. An aqueous solution of sodium or ammonia hydroxide is added to the other phase. After this, the prepared heterogeneous system with added additives is kept at a temperature of 25-80°C and atmospheric pressure for 1-24 hours. The precipitate, obtained in the interphase layer, is isolated, washed with distilled water and air dried until the mass change ceases. Nanodimensional copper or zinc oxide crystals are obtained. Polyethylene oxide (polyethylene glycol) with a molecular weight of 1500-20000 is used as the water-soluble polymer. A metal sulfate, selected from the group of Na, Li, Cu, Zn, Mg, Cd, Co, is used as a phase-forming metal salt. Sulfate is used as the ammonium salt.

EFFECT: invention makes it possible to simplify the production of nanocrystals of metal oxides without the use of toxic, flammable and explosive organic solvents.

6 ex, 6 dwg