▎ 摘　　要

NOVELTY - Preparing graphene coated magnesium hydroxide nano composite material, comprises (a) adding 0.1-0.5 g graphite oxide to 150 ml sodium-phosphorus-tungsten vanadium oxides complex (Na4PW11VO40) (0.1-0.3 M) solution, and stirring at room temperature under speed of 200 revolutions/minute for 10 minutes, (b) adding 1-2 g magnesium acetate and 1 g polystyrene-polyethylene glycol (PS-PEG) resin to the solution prepared in the step (a), adjusting pH to 9-11 with sodium hydroxide, heating, (c) cooling the solution of step (b) to room temperature, introducing into photoreactor, and reacting by irradiating with YLS-2000 laser for 6 hours to obtain black emulsion, (d) placing the black emulsion in 150 ml mixture containing 1:1 deionized water and n-butanol, treating with ultrasonic, filtering, and washing with deionized water until quality is unchanged, and (e) vacuum drying the filter cake at 50-80 degrees C for 8-10 hours, and grinding. USE - The method is useful for preparing graphene coated magnesium hydroxide nano composite material. ADVANTAGE - The method is economical, simple, fast, and environmentally friendly, improves productivity, and does not need any optical catalyst or reducing agent. DETAILED DESCRIPTION - Preparing graphene coated magnesium hydroxide nano composite material, comprises (a) adding 0.1-0.5 g graphite oxide to 150 ml sodium-phosphorus-tungsten vanadium oxides complex (Na4PW11VO40) (0.1-0.3 M) solution, and stirring at room temperature under speed of 200 revolutions/minute for 10 minutes, (b) adding 1-2 g magnesium acetate and 1 g polystyrene-polyethylene glycol (PS-PEG) resin to the solution prepared in the step (a), adjusting pH to 9-11 with sodium hydroxide, heating at 60-80 degrees C under stirring speed of 300 revolutions/minute for 3 hours, (c) cooling the solution of step (b) to room temperature, introducing into a photoreactor, and reacting by irradiating with YLS-2000 laser for 6 hours to obtain black emulsion, (d) placing the black emulsion in 150 ml mixture containing 1:1 deionized water and n-butanol, treating with ultrasonic waves of 30-50 KHz and power of 80-120 W for 2-3 hours, filtering, and washing filter cake with deionized water until quality is unchanged, and (e) vacuum drying the filter cake at 50-80 degrees C for 8-10 hours, and grinding the dried filter cake to obtain graphene-coated magnesium hydroxide nanocomposite.