METHOD FOR PRODUCING POROUS GRAPHENE Russian patent published in 2018 - IPC C01B32/184 B82B3/00 B82Y40/00 

FIELD: nanotechnology.

SUBSTANCE: carbon source obtained from biomass, selected from the cellulose and/or lignin, is dried over a catalyst selected from a group consisting of manganese chlorides, iron compounds, cobalt compounds and nickel compounds, to obtain the first intermediate product. The weight ratio of the catalyst to the carbon source is (0.01-2):1. The obtained first intermediate product is heated in a protective atmosphere from (20-40)°C to (300-400)°C at a speed of (5-20)°C/min and held at this temperature to obtain the second intermediate product. The resulting second intermediate product is heated in a protective atmosphere to (800-900)°C at a speed of (30-40)°C / min and held at this temperature to obtain the third intermediate product. The resulting third intermediate product is heated in a protective atmosphere to (1100-1300)°C at a speed of (50-60)°C/minute and held at this temperature to obtain the fourth intermediate product. The resulting fourth intermediate product is cooled in a protective atmosphere to (900-1000)°C at a speed of (30-50)°C/min. Throughout all stages one or more gases selected from nitrogen and inert gases are used as a protective atmosphere. Agricultural and forestry wastes, for example, corn stalks or cobs, sorghum stalks, beet pulp, oilcake, plant wastes, wastes of corn cobs, wood chips, stalks of cotton and cane are used as a biomass resource at the first stage.

EFFECT: method for producing porous graphene from cheap and affordable raw materials is simple, highly productive and provides improved electrical conductivity of the target product.

23 cl, 5 dwg, 10 ex