▎ 摘　　要

NOVELTY - Method for preparing boron-doped graphene-coated ferrous sulfide electro-Fenton catalyst involves (A) adding boric acid and graphene to water to form a mixed solution, transferring the mixed solution to a PTFE reactor, and centrifuging to obtain boron-doped graphene powder, (b) adding boron-doped graphene powder and ferric nitrate nonahydrate to water, stirring to form a uniform solution, and stirring the obtained solution in a water bath, adding a hydrazine hydrate solution, transferring the obtained mixed solution to a PTFE reactor, centrifuging the obtained mixed solution to obtain ferrous oxide powder coated with boron-doped graphene, and (c) placing the ferrous oxide powder coated with boron-doped graphene and sulfur powder in an alumina crucible, placing the crucible in a tube furnace, taking it out after natural cooling, and washing the obtained powder with sulfuric acid and water, placing in a vacuum drying oven to obtain the product. USE - The method is used for preparing boron-doped graphene-coated ferrous sulfide electro-Fenton catalyst which is used in the preparation of organic wastewater purification products (all claimed). DETAILED DESCRIPTION - Method for preparing boron-doped graphene-coated ferrous sulfide electro-Fenton catalyst involves (A) adding boric acid and graphene to water in a mass ratio of 1:2 to form a mixed solution, transferring the mixed solution to a PTFE reactor at 180 degrees C for at least 12 hours, and centrifuging to obtain boron-doped graphene powder, (b) adding boron-doped graphene and ferric nitrate nonahydrate to water in a mass ratio of 1:10, stirring to form a uniform solution, and stirring the obtained solution in a water bath at 70 degrees C, at the same time, adding a hydrazine hydrate solution with a concentration of 60 wt.%, and the volume ratio of the hydrazine hydrate solution to the uniform solution is 6:1, transferring the obtained mixed solution to a PTFE reactor at 150 degrees C and reacting for at least 6 hours, centrifuging the obtained mixed solution to obtain ferrous oxide powder coated with boron-doped graphene, and (c) placing the ferrous oxide powder coated with boron-doped graphene and sulfur powder in an alumina crucible in a mass ratio of 1:10, placing the crucible in a tube furnace at 450 degrees C and reacting for 6 hours, taking it out after natural cooling, and washing the obtained powder with sulfuric acid and water, placing in a vacuum drying oven at a temperature of 80 degrees C for at least 12 hours to obtain the product. INDEPENDENT CLAIMS are included for the following: (1) application of the boron-doped graphene-coated ferrous sulfide electro-Fenton catalyst in the preparation of organic wastewater purification products; and (2) an application method comprising introducing organic wastewater to be treated into the electrochemical reactor, with graphite as anode, using the modified carbon felt as cathode and carrying-out aeration near the cathode, after adding the electric Fenton catalyst, carrying-out mechanical stirring for 0-20 minutes.