METHOD FOR PRODUCING A PHOTOCATALYST FOR WATER DECOMPOSITION REACTION BASED ON MOLECULAR DOPED CARBON NITRIDE Russian patent published in 2023 - IPC B01J27/20 B01J27/24 B01J31/02 B01J37/04 B01J37/08 

FIELD: chemical industry.

SUBSTANCE: invention relates to photocatalysts for the reaction of water decomposition in chemical enterprises specializing in fine and basic organic synthesis, as well as in enterprises in the field of hydrogen energy. A method for producing a photocatalyst for the reaction of water decomposition based on molecular doped carbon nitride, in which the weight of melamine and 4-aminobenzo[c][1,2,5]thiadiazole or 4-aminobenzo[c][1,2,5]selenadiazole is preliminarily determined in accordance with the given mass of the photocatalyst and the degree of doping, the samples are ground until a homogenized mixture is obtained, then the mixture in a crucible closed with a lid is placed in a muffle furnace with an inert atmosphere, heated at a rate of 3°C/min up to a temperature of 550°C, kept for one hour, cooled to room temperature, then the resulting material is removed from the oven, ground, poured into an open crucible, placed in a furnace and reheated in atmospheric air at a rate of 3°C/min up to a temperature of 550°C with exposure for eight hours.

EFFECT: obtaining a water decomposition photocatalyst based on molecularly doped graphite-like carbon nitride (polyheptazinimide) synthesized from commercially available compounds (melamine, (thio)urea, benzo[c][1,2,5]chalcogendiazole amines, carbazole amines and its derivatives), characterized by a particle size of about 40 nm, a specific surface of 50…60 m²/g, hydrogen evolution rate during photocatalytic water decomposition of 650…1000 mcmol/(h⋅g).

1 cl, 4 dwg., 1 ex