▎ 摘　　要

NOVELTY - Preparing titanium dioxide-graphene composite photo catalyst involves taking graphite as raw material, preparing graphene oxide using Hummer method, dispersing prepared graphene oxide into alcohol solution to obtain oxidized graphene suspension. The titanium source is dispersed in graphene oxide suspension to obtain titanium-containing source of graphene oxide suspension. The alcohol aqueous solution of precipitator is prepared. The alcohol aqueous solution of precipitator is added to oxidize graphene suspension. USE - Method for preparing titanium dioxide-graphene composite photo catalyst used for preparing carbon nano graphene composite carbon material (claimed). ADVANTAGE - The method enables to prepare titanium dioxide-graphene composite photo catalyst that is rich in defective bit, avoids the use of the noble metal, and in cost effective manner. DETAILED DESCRIPTION - Preparing titanium dioxide-graphene composite photo catalyst involves taking graphite as raw material, preparing graphene oxide using Hummer method, dispersing prepared graphene oxide into alcohol solution to obtain oxidized graphene suspension. The titanium source is dispersed in graphene oxide suspension to obtain titanium-containing source of graphene oxide suspension. The alcohol aqueous solution of precipitator is prepared. The alcohol aqueous solution of precipitator is added to oxidize graphene suspension with titanium source under stirring to obtain suspension. The obtained suspension is added to polytetrafluoroethylene in container, sealed and heated at 120-220 degrees C for 3-24 hours, cooled to room temperature and centrifuged. The mixed centrifuged is removed, filtered, washed and dried for 24-36 hours to obtain titanium dioxide-graphene composite photo catalyst. An INDEPENDENT CLAIM is included for a method for preparing carbon nano graphene composite carbon material, which involves: (A) paving obtained titanium dioxide-graphene composite photo catalyst uniformly on bottom of the boat; (B) placing boat in tubular atmosphere furnace; (C) introducing nitrogen with 200-700 milliliter per minute speed at 50 degrees C, 750 degrees C and 1000 degrees C; and (D) introducing methane gas with 100-400 milliliter per minute speed for 10-15 minutes to obtain carbon nano graphene composite carbon material.