▎ 摘　　要

NOVELTY - Preparing graphene/nano titanium dioxide composite, comprises dispersing 500-10000 parts by weight (pbw) of nano titanium dioxide and 1 pbw of graphene in water/alcohol solution in a volume ratio of 2:1-3:1, and reacting the nano titanium dioxide and graphene in the dispersion solution with pressure of 10-15 MPa and a temperature of 100-200 degrees C to obtain graphene/nano titanium dioxide composite. USE - The method is useful for preparing graphene/nano titanium dioxide composite (claimed). ADVANTAGE - The method is capable of simply and economically preparing the graphene/nano titanium dioxide composite with high efficiency and stability in an environmentally friendly manner. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for: (1) preparing titanium dioxide nanotube comprising adding titanium dioxide powder into 5-15 M of sodium hydroxide water solution to obtain reaction solution in which a weight ratio of the titanium dioxide powder to the sodium hydroxide in the sodium hydroxide water solution is 1:1-1:3, and putting the reaction solution in a high-pressure reactor, reacting the nano titanium dioxide and graphene in the dispersion solution with pressure of 10-15 MPa and temperature of 100-200 degrees C to obtain titanium dioxide nanotube; and (2) a graphene/nano titanium dioxide composite comprising nano titanium dioxide and graphene with a weight ratio of 500:1-10000:1.