NITROGEN-SILICON-CODOPED LAYERED CARBON NANOMATERIAL AND METHOD FOR ITS PRODUCTION Russian patent published in 2023 - IPC C01B32/186 B82Y40/00 

FIELD: nanotechnology.

SUBSTANCE: invention can be used in the manufacturing of catalysts, sensors, sorbents, modifying additives in polymers, pharmaceuticals, electrode materials for energy conversion and storage devices. Graphene-like carbon nanomaterial is obtained by pyrolysis of organic precursors at 700-850°C in a tubular quartz reactor in the presence of a mesoporous template, which is magnesium oxide with a lamellar structure, with a mass ratio of precursor to template from 0.64 to 3.25. As organic precursors, a mixture of a hydrocarbon with an organic compound containing silicon and nitrogen is used; or a nitrogen-containing organic compound and its subsequent replacement with a mixture of a hydrocarbon with an organic compound containing silicon; or an organic compound containing silicon, followed by its replacement with a mixture of a hydrocarbon and a nitrogen-containing organic compound. The resulting graphene-like carbon nanomaterial consists of 2-15 graphene layers and simultaneously contains from 0.5 to 4 at.% silicon and 0.5 to 5 at.% nitrogen, graphene particles covalently bonded to carbon with a diameter of 10-30 nm and a thickness of 0 .5 to 5 nm. After pyrolysis, the resulting carbon material is cleaned of SiO₂ impurities by immersion in an aqueous ammonia solution with a concentration of 25 vol.% for 2-24 hours with periodic stirring, subsequent filtration and drying at 80±2°C.

EFFECT: invention makes it possible to obtain the specified material in one stage and increase its adsorption and electrochemical capacity in relation to metal ions.

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