▎ 摘　　要

NOVELTY - Preparing graphene-titanium dioxide composite photocatalyst, comprises: (a) adding graphite oxide in deionized water, ultrasonically peeling to obtain a graphene oxide solution; (b) gradually adding titanium compound into a mixed solution, and magnetically stirring to obtain a titanium precursor solution; (c) transferring the oxide solution into the precursor solution, and magnetically stirring to obtain a mixed solution; (d) performing hydrothermal reaction; and (e) washing photo-catalytic material with deionized water, centrifugally separating, drying and grinding. USE - The catalyst is useful in environmental protection fields e.g. sewage treatment. ADVANTAGE - The catalyst prepared by the method has high specific surface area, high adsorption property and high photocatalytic activity. DETAILED DESCRIPTION - Preparing graphene-titanium dioxide composite photocatalyst, comprises: (a) adding graphite oxide (10-100 mg) in deionized water, ultrasonically peeling graphite oxide for 30-60 minutes to obtain a graphene oxide solution; (b) gradually adding titanium compound (1-10 ml) into a mixed solution of reducing alcohol solvent and acid in a volume ratio of 1:1-1:10, and magnetically stirring for 30-60 minutes to obtain a titanium precursor solution; (c) transferring the graphene oxide solution into the titanium precursor solution, adding water to a total volume of 10-40 ml, and magnetically stirring for 30-60 minutes to obtain a mixed solution; (d) introducing the mixed solution into a reaction kettle, performing hydrothermal reaction at 60-200 degrees C for 0.5-24 hours to obtain a graphene and titanium dioxide composite photocatalytic material; and (e) washing the photo-catalytic material with deionized water, centrifugally separating for 2-3 times, drying at 60 degrees C and grinding.