▎ 摘　　要

NOVELTY - Preparation of titanium dioxide (B)-doped reduced graphene oxide aerogel composite material involves: (1) adding a preset amount of titanium trichloride solution and deionized water to ethylene glycol solution, and stirring to obtain a well-mixed lavender solution; (2) transferring the solution to a 50 ml PTFE high-pressure reaction kettle for solvothermal reaction; (3) centrifugally washing, and then drying in an oven to obtain titanium dioxide (B) powder; (4) putting the obtained powder into a tubular furnace for heat treating to remove residual organic molecules on the surface; (5) weighing a preset amount of graphite powder, adding potassium persulfate and phosphorus pentoxide to a 50 ml beaker, slowly adding a preset amount of concentrated sulfuric acid to the beaker, continuously stirring, and drying in a vacuum drying oven to obtain a pre-oxidized graphite powder; and (6) centrifugally washing the pre-oxidized graphite powder to neutral, and drying. USE - The method is useful for preparing titanium dioxide (B)-doped reduced graphene oxide aerogel composite material used as anode material for lithium-ion battery. ADVANTAGE - The method provides titanium dioxide (B)-doped reduced graphene oxide aerogel composite material with excellent specific capacity and rate performance. DETAILED DESCRIPTION - Preparation of titanium dioxide (B)-doped reduced graphene oxide aerogel composite material involves: (1) sequentially adding a preset amount of titanium trichloride solution and deionized water to ethylene glycol solution, and stirring for 2 minutes to obtain a well-mixed lavender solution; (2) transferring the solution to a 50 ml PTFE high-pressure reaction kettle for solvothermal reaction; (3) after the reaction is completed, centrifugally washing, and then drying in an oven to obtain titanium dioxide (B) powder; (4) putting the obtained powder into a tubular furnace for heat treating to remove residual organic molecules on the surface; (5) weighing a preset amount of graphite powder, adding potassium persulfate and phosphorus pentoxide to a 50 ml beaker, slowly adding a preset amount of concentrated sulfuric acid to the beaker, continuously stirring, and drying in a vacuum drying oven to obtain a pre-oxidized graphite powder; (6) centrifugally washing the pre-oxidized graphite powder to neutral, and placing in a drying box for drying treatment; (7) pouring the dried pre-oxidized graphite powder into a 500 ml beaker under ice bath, adding a preset amount of concentrated sulfuric acid to the beaker, and then slowly adding a preset amount of potassium permanganate for low-temperature oxidation; (8) heating the mixture to room temperature, reacting for a preset period of time, and performing moderate temperature oxidation; (9) slowly adding a preset amount of deionized water to the mixture, heating the mixture to high temperature, reacting for a preset period of time, and performing high-temperature oxidation; (10) adding a preset amount of deionized water to the mixture while adding a preset amount of hydrogen peroxide until the solution turns golden yellow; (11) centrifugally washing the golden yellow solution to neutral, and drying to obtain graphene oxide; (12) weighing a preset amount of graphene oxide, placing in a glass bottle, adding a preset amount of deionized water, and ultrasonically processing for 10 minutes to obtain a graphene oxide dispersion; (13) weighing a preset amount of titanium dioxide-(B) powder, placing in the graphene oxide dispersion, and ultrasonically processing for 5 minutes to make it uniformly mixed to obtain a brownish yellow dispersion liquid containing titanium dioxide (B) and graphene oxide; (14) adding a preset amount of ascorbic acid as a reducing agent to the brown-yellow dispersion obtained in step (13), and reacting in a vacuum drying oven to obtain titanium dioxide (B)-reduced graphene oxide aerogel; and (15) freeze-drying the aerogel; and (16) using the aerogel as anode material of lithium-ion battery for electrochemical test.