▎ 摘　　要

NOVELTY - Preparation of magnetic graphene titanium dioxide nano composite wastewater treatment agent includes dispersing graphene oxide in deionized water, dissolving sodium nitrite in water, cooling, adding p-aminobenzenesulfonic acid and aqueous hydrochloric acid solution, reacting, dissolving sodium borohydride in water, mixing, reacting, cooling, stripping, adding aryl diazonium salt, reacting, dialyzing, adding iron chloride tetrahydrate and iron chloride hexahydrate to deionized water, mixing, reacting, cooling, washing, reacting, mixing, cooling, using anhydrous ethanol and washing. USE - Method of preparing magnetic graphene titanium dioxide nano composite wastewater treatment agent (claimed). ADVANTAGE - The agent degrades organic pollutants such as methylene blue in water, recovers and reuses wastewater treatment agent through an external magnetic field and has excellent photocatalytic degradation performance, good recyclability and regeneration performance. DETAILED DESCRIPTION - Preparation of magnetic graphene titanium dioxide nano composite wastewater treatment agent comprises dispersing 50 mg graphene oxide in 50 mL deionized water, dissolving 36 mg sodium nitrite in 20 g water, cooling at 0-5 degrees C, adding 92 mg p-aminobenzenesulfonic acid and 1 mL 1 M aqueous hydrochloric acid solution, reacting in ice-water bath for 30 minutes, dissolving 300-400 mg sodium borohydride in 15-20 mL water, adjusting pH to 9-10 with 5 wt.% sodium carbonate aqueous solution, mixing, reacting at 75-85 degrees C for 1-2 hours, cooling to room temperature, stripping for 10-30 minutes, adding aryl diazonium salt, placing in ice-water bath, reacting at room temperature for 1-3 hours, dialyzing, adding iron chloride tetrahydrate and iron chloride hexahydrate to deionized water, mixing, reacting, cooling to room temperature, washing, adding graphene to sodium hydroxide, reacting, mixing, cooling to room temperature, using anhydrous ethanol and washing with water.