▎ 摘　　要

NOVELTY - A graphene oxide/titanium dioxide nano needle composite material is prepared using graphene oxide as carrier, and loading titanium dioxide nanocomposites on the graphene oxide surface. USE - Graphene oxide/titanium dioxide nano needle composite material for degradation of methylene blue wastewater (claimed). ADVANTAGE - The graphene oxide/titanium dioxide nano needle composite material has stable multi-level nanostructure, light capture ability, high photocatalytic efficiency, high degradation efficiency and excellent photocatalytic degradation effect, and prepared by simple operation at low cost. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for the following: (i) a preparation of graphene oxide/titanium dioxide nano needle composite material, which involves adding oxidized graphene to ethylene glycol solution to obtain oxidized graphene dispersion, adding isopropyl titanate to concentrated hydrochloric acid, dripping ultrapure water and stirring (I) to obtain mixed solution, adding mixed solution to oxidized graphene dispersion, stirring (II) and carrying out solvothermal reaction to obtain final product; and (ii) an application of graphene oxide/titanium dioxide nano needle composite material, which involves graphene oxide/titanium dioxide nano needle composite material to methylene blue wastewater for photocatalytic degradation to complete the treatment of methylene blue wastewater. The additive amount of graphene oxide/titanium dioxide nano needle composite material is 20-40 mg per 100 mL of methylene blue wastewater.