▎ 摘　　要

NOVELTY - Preparing titanium dioxide graphene photocatalytic material comprises e.g. (1) adding graphene oxide to deionized water, ultrasonically processing for 30-60 minutes to obtain a graphene oxide dispersion, (2) adding chitosan to 2 wt.% acetic acid solution, stirring for 15-30 minutes to obtain a chitosan acetic acid solution, (3) adding titanium dioxide to anhydrous ethanol for 30-60 minutes to obtain a titanium dioxide solution having a concentration of 2-10 wt.%; (4) adding zinc sulfide to the sodium hydroxide solution to dissolve the zinc sulfide solution,; and (5) adding the titanium dioxide solution to the zinc sulfide solution, stirring and mixing uniformly, then adding the graphene oxide dispersion and the chitosan acetic acid solution, mixing and ultrasonically processing for 1-2 hours, transferring to a polytetrafluoroethylene liner hydrothermal reaction vessel, hydrothermally reacting at 210 degrees C for 12 hours, cooling to room temperature, and washing with water. USE - The method is useful for preparing titanium dioxide graphene photocatalytic material. ADVANTAGE - The method can utilizes the high conductivity of graphene to prolong the life of photogenerated electrons and photogenerated holes, thus improving the photocatalytic activity of titanium dioxide and zinc sulfide, and simultaneous introduction of the natural polymer chitosan can effectively improve the strength and photocatalytic performance of the material. The photocatalytic material is novel, non-toxic and harmless, is non-toxic and harmless, and the simple whole preparation process and low cost. DETAILED DESCRIPTION - Preparing titanium dioxide graphene photocatalytic material comprises (1) adding graphene oxide to deionized water, ultrasonically processing for 30-60 minutes to obtain a graphene oxide dispersion, (2) adding chitosan to 2 wt.% acetic acid solution, stirring for 15-30 minutes to obtain a chitosan acetic acid solution having a concentration of 2-4 wt.%, (3) adding titanium dioxide to anhydrous ethanol for 30-60 minutes to obtain a titanium dioxide solution having a concentration of 2-10 wt.%; (4) adding zinc sulfide to the sodium hydroxide solution to dissolve the zinc sulfide solution, the concentration of zinc sulfide is 1-4 wt.%; and (5) adding the titanium dioxide solution to the zinc sulfide solution, stirring and mixing uniformly, then adding the graphene oxide dispersion and the chitosan acetic acid solution, mixing and ultrasonically processing for 1-2 hours, transferring the mixture to a polytetrafluoroethylene liner hydrothermal reaction vessel, hydrothermally reacting at 210 degrees C for 12 hours, cooling to room temperature, and washing for three times with water to obtain a photocatalytic material.