▎ 摘　　要

NOVELTY - Boron nitride quantum dot modified nano-cyclic magnetic graphene oxide composite photocatalytic material comprises a magnetic ferroferric oxide nanoring, where the surface of the magnetic ferroferric oxide nanoring is coated with graphene oxide, and the graphene oxide is grafted with boron nitride quantum dots. USE - The catalyst is useful for catalyzing degradation and removal of erythromycin and roxithromycin in water (claimed). ADVANTAGE - The method: is simple and controllable; prepares product which has excellent thermal stability, and high photocatalytic degradation efficiency and dispersibility; and realizes efficient and convenient solid-liquid separation. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are also included for: (1) preparing the boron nitride quantum dot modified nano-cyclic magnetic graphene oxide composite photocatalytic material, comprising (i) adding 2-20 mmol sodium dodecyl sulfonate to 50 plus minus 1 ml toluene, ultrasonically dispersing for 9-11 minutes, adding 0.5-3 mmol ferric chloride tetrahydrate, 1-10 mmol ferric nitrate nonahydrate and 0-5 ml ethanol, transferring the mixed solution to a three-necked flask, vigorously stirring at 55-65 degrees C for 20-40 minutes, programming the microwave to 85-95 degrees C, immediately adding 0.5-10 mmol hydrazine (35 plus minus 1% aqueous solution) and 5-50 mg graphene oxide, refluxing reaction for 6-9 hours, cooling to room temperature, magnetically separating, washing with ultrapure water multiple times to neutral, then washing multiple times with ethanol, and vacuum drying at 55-65 degrees C for 10-14 hours to prepare nano-ring magnetic graphene oxide composite materials, (ii) adding 0.2-2 mmol rigid aromatic amine molecular monomer and 0.5-5 mmol boric acid to 10 plus minus 1 ml ethanol aqueous solution, and ultrasonically dispersing for 9-11 minutes to obtain an emulsion, transferring the emulsion to an autoclave, hydrothermally reacting at 160-250 degrees C for 10-14 hours, cooling to room temperature, and vacuuming the product with a 0.21-0.23 mu m organic phase filter membrane to obtain a rigid aroma amino boron nitride quantum dot solution, and (iii) adding 0.2-2 g nano-cyclic magnetic graphene oxide composite material to the rigid aromatic amino boron nitride quantum dot solution, ultrasonically dispersing for 9-11 minutes until the dispersion is uniform, performing microwave program heating to 60-90 degrees C, performing reflux reaction for 5-10 hours, cooling to room temperature, performing magnetic separation, washing with ultrapure water multiple times to neutral, washing multiple times with ethanol, and vacuum drying at 55-65 degrees C for 10-14 hours; and (2) use method of the boron nitride quantum dot modified nano-cyclic magnetic graphene oxide composite photocatalytic material, comprising using the catalyst to catalyze the degradation and removal of erythromycin and roxithromycin in water.