▎ 摘　　要

NOVELTY - Preparing beta -iron oxyhydroxide loaded graphene oxide catalyst comprises (i) dissolving graphene oxide in aqueous solution, and stirring uniformly to obtain graphene oxide uniform dispersing liquid, (ii) adding resulting uniform dispersing liquid to iron(iii) chloride hexahydrate, (iii) subjecting the resulting solution to ultrasonic treatment, reacting in water bath under heating and stirring condition, and (iv) cooling the solution to room temperature, centrifugally separating, using deionized water to washing the supernatant for 3-10 times, clarifying, drying, and grinding into powder. USE - The catalyst is useful for dye visible light catalysis (claimed), and water pollution treatment. ADVANTAGE - The catalyst: removes dye color; decreases biological toxicity; purifies water; does not cause secondary pollution; reduces the biological toxicity of the intermediates produced by the reaction; is simple; utilizes easily available raw materials; and is easy to separate. DETAILED DESCRIPTION - Preparing beta -iron oxyhydroxide loaded graphene oxide catalyst comprises (i) dissolving graphene oxide in aqueous solution, and stirring uniformly to obtain graphene oxide uniform dispersing liquid, where the mass volume ratio of graphene oxide and aqueous solution is (50-200) mg:(40-160) ml, (ii) adding resulting uniform dispersing liquid to iron(iii) chloride hexahydrate, where mol ratio of iron(iii) chloride hexahydrate and graphene oxide is (10-100):1, (iii) subjecting the resulting solution to ultrasonic treatment for 30-150 minutes, reacting in 50-100 degrees C water bath under heating and stirring condition for 3-10 hours, and (iv) cooling the solution to room temperature, centrifugally separating, using deionized water to washing the supernatant for 3-10 times, clarifying, drying in 30-90 degrees C oven for 8-20 hours, and grinding into powder to obtain the catalyst. An INDEPENDENT CLAIM is also included for use of the beta -iron oxyhydroxide loaded graphene oxide catalyst in dye visible light catalysis, comprising placing graphene oxide catalyst into water containing 20-80 mg/l dye, adsorbing for 30 minutes under dark condition to achieve adsorption equilibrium, adding hydrogen peroxide into the reaction solution, at the same time, where water body light intensity is 5-15 mW/cm2 at the center of the liquid surface at 16-20 cm, magnetically stirring at room temperature under rotating condition of 100-500 rotations/minute (rpm), decolorizing the dye to 97.62% within 180 minutes, and purifying the water, where the mol concentration ratio of the catalyst and hydrogen peroxide is (0.1-1) mg/l:(0.5-5 mmol/l).