▎ 摘　　要

NOVELTY - Butyl titanate is added to anhydrous ethanol, acetylacetone is added and stirred, to obtain mixed solution (A). Water, ethanol and acetic acid are mixed, to obtain solution (B). The solution (B) is dripped in solution (A), dried, ground, added to potassium hydroxide solution and subjected to hydrothermal reaction, to obtain titania nanowires. Graphene oxide solution is prepared, mixed with titania nanowires, subjected to hydrothermal reaction, cooled, washed and dried, to obtain graphene-titania nanowire composite powder material photocatalyst. USE - Preparation of graphene-titania nanowire composite powder material photocatalyst used for photodegradation of organic pollutants (claimed) e.g. methylene blue. ADVANTAGE - The method enables economical preparation of graphene-titania nanowire composite powder material photocatalyst. The obtained photocatalyst enables 100% degradation of methylene blue. DETAILED DESCRIPTION - Butyl titanate is added slowly under stirring to 30 mL anhydrous ethanol in a round bottom flask, stirred for 30 minutes, 0.5 mL acetylacetone is added and stirred for 1 hour, to obtain mixed solution (A). Then, 6 mL water, 15 mL ethanol and 3 mL acetic acid are mixed by stirring, to obtain solution (B). The solution (B) is dripped in solution (A) at rate of 1 drop/second and stirred, to obtain gel. The obtained gel is dried at 80 degrees C and ground, to obtain amorphous titania. Amorphous titania is added to potassium hydroxide solution having concentration of 5-20 mol/L, mixed, transferred to hydrothermal reactor, subjected to hydrothermal reaction at 100-220 degrees C for 5-24 hours, cooled, washed, subjected to pickling, washed using alcohol and dried, to obtain titania nanowires. Graphite powder obtained by Hummers method is provided as raw material, graphite oxide is dissolved in mixture of ethanol and water and ultrasonically treated for 30-90 minutes, to obtain graphene oxide solution having concentration of 0.1-2.5 mg/ml. Graphene oxide and titania nanowires are uniformly mixed, supplied to hydrothermal reactor, subjected to hydrothermal reaction at 120-220 degrees C for 1-10 hours, cooled to room temperature, washed using alcohol to neutral and resultant product is dried at 60 degrees C, to obtain graphene-titania nanowire composite powder material photocatalyst.