▎ 摘　　要

NOVELTY - A photocatalytic material is prepared using titanium dioxide, graphene oxide and graphitic carbon nitride by electrostatic assembly adsorption method. The mass ratio of graphene oxide and graphitic carbon nitride is (0:1)-(1:4). USE - Photocatalytic material for degrading ammoniacal nitrogen in sewage under simulated sunlight conditions (claimed). ADVANTAGE - The photocatalytic material has reduced electron-hole recombination rate, which improves the degradation efficiency of ammoniacal nitrogen and increases the conversion rate of nitrogen, and is prepared by a simple and economical method. The photocatalytic material enables simple and feasible degradation of ammoniacal nitrogen. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for the following: (1) preparation of the photocatalytic material, which involves putting urea into crucible, covering, calcining in muffle furnace at 520 degrees C for 4 hours at heating rate of 5 degrees C/minute, naturally cooling, grinding into powder, drying to obtain graphitic carbon nitride powder, adding 1 g graphite powder to 23 mL concentrated sulfuric acid, stirring overnight in ice water bath, adding 3 g potassium permanganate, ultrasonically processing for 8-10 hours, adding 46 mL high purity water, adding 140 mL high purity water and 10 mL 30 %mass hydrogen peroxide to stop reaction, washing precipitate 3 times with 5% hydrochloric acid and water, centrifuging at 12000 rpm for 20 minutes, freeze-drying at 40 degrees C to obtain graphene oxide, mixing 1 g graphitic carbon nitride sample with 200 mL 37 %mass concentrated hydrochloric acid, ball milling for 3 hours, washing with water, drying at 105 degrees C to obtain protonated graphitic carbon nitride material, assembling protonated graphitic carbon nitride material and graphene oxide by electrostatic adsorption method, ultrasonically dispersing in 25 mL deionized water separately, ultrasonically processing for 15 minutes to ensure uniform dispersion, dripping protonated graphitic carbon nitride to graphene oxide aqueous solution under stirring conditions, forming graphitic carbon nitride/graphene oxide structure material through electrostatic interaction, washing material 3 times with deionized water, drying at 40 degrees C, dispersing structural material in 1:1 mixed solution of deionized water and ethanol, ultrasonically dispersing titanium dioxide powder in water, dripping titanium dioxide powder dispersion liquid to graphitic carbon nitride/graphene oxide material dispersion liquid, stirring for 2 hours, transferring to 100 mL reactor, reacting at 100 degrees C for 24 hours, washing 3 times with deionized water, and drying at 40 degrees C; and (2) use of photocatalytic material for degrading ammoniacal nitrogen, which involves dispersing photocatalytic material in ammoniacal nitrogen solution in ratio of 1 g/L, stirring for 30 minutes, irradiating under simulated sunlight for 4.5 hours, and measuring degradation rate with ammoniacal nitrogen analyzer, where intensity of simulated illumination is 100 mW/cm2.