METHOD FOR OBTAINING COMPOSITE Co/CoO NANOPARTICLES WITH ANTIMICROBIAL PROPERTIES AND NANOPARTICLES OBTAINED BY THIS METHOD Russian patent published in 2023 - IPC C01G51/00 B22F9/14 B82B3/00 B82Y40/00 A61L2/238 

FIELD: chemistry and nanotechnology.

SUBSTANCE: group of inventions relates to the production of nanoparticles using the electric wire explosion (EWI) method, promising for use as electrocatalysts, electrochemical sensors, supercapacitors, and also antimicrobial agents. A method for producing composite Co/CoO nanoparticles with a core-shell structure, where the core is Co and the shell consists of cobalt oxide CoO, with combined magnetic and antibacterial properties, includes an electric explosion of a cobalt wire in a buffer gas – a gas mixture of argon and oxygen containing from 1 to 3.5 vol.% oxygen. It is also proposed to use the obtained composite Co/CoO nanoparticles with a core-shell structure, where the CoO content is from 6 to 72% by weight of the nanoparticle, as an agent with high antibacterial activity against antibiotic-resistant MRSA.

EFFECT: obtained composite Co/CoO nanoparticles have combined antibacterial and magnetic properties in one particle, which makes them suitable for magnetic separation, for example, in the process of liquid disinfection.

5 cl, 6 dwg, 1 tbl, 5 ex