▎ 摘　　要

NOVELTY - Preparing graphene-platinum-titanium dioxide composite nano-tube material involves mixing the nano particles of titanium dioxide and sodium hydroxide according to mass ratio of 8:1 into corundum crucible, then adding 0.01-10.0 wt.% graphene powder and compound of platinum in the corundum crucible and mixing uniformly, where the metal ion in the compound of platinum is platinum (III) ion in 0.01-5.0 wt.%. The corundum crucible filled with mixed raw material is placed in the vacuum high temperature furnace for isolating air at room temperature, the furnace door is closed. USE - Method for preparing graphene-platinum-titanium dioxide composite nano-tube material (claimed). ADVANTAGE - The method enables to prepare graphene-platinum-titanium dioxide composite nano-tube material which is easy to process in a time-saving and cost-effective manner. It has stable property, greatly improves the length of the nano tube, and effectively improves the light catalytic characteristic of the composite nano material. DETAILED DESCRIPTION - Preparing graphene-platinum-titanium dioxide composite nano-tube material involves mixing the nano particles of titanium dioxide and sodium hydroxide according to mass ratio of 8:1 into corundum crucible, then adding 0.01-10.0 wt.% graphene powder and compound of platinum in the corundum crucible and mixing uniformly, where the metal ion in the compound of platinum is platinum (III) ion in 0.01-5.0 wt.%. The corundum crucible filled with mixed raw material is placed in the vacuum high temperature furnace for isolating air at room temperature, the furnace door is closed, the argon gas flow valve is opened and argon gas is introduced fir 30-120 minutes to remove air in furnace, then heated at 400-500 degrees C from room temperature at heating speed of 5 degrees C/minute to melt the mixed raw material for 30-60 minutes. The high temperature furnace is cooled to room temperature, the corundum crucible is taken out and the argon gas valve is closed to obtain the graphene platinum ion titanate mixed alkali melting block. The obtained melting block is put into polyfluortetraethylene plastic beaker, proper amount of boiling distilled water is added to dissolve it, where adding amount of distilled water needs to ensure that the concentration of sodium chloride in solution is not less than 10 mole/L. The hydrothermal treatment operation is performed by mixing the melting block into titanate precipitate, the polytetrafluoroethylene plastic beaker is covered with cup cover and put into a dryer at 110-130 degrees C for 2-5 days to perform hydrothermal reaction to obtain the composite titanate nanotubes. The plastic beaker is cooled to room temperature, washed with tap water to neutrality, then washed with 2% nitric acid to substitute the sodium ions by hydrogen ions, and again washing with distilled water to neutral. The obtained mixed titanate nanotube precipitate is transferred to a glass beaker and glass beaker is put in the vacuum high temperature furnace with argon gas device. The high temperature furnace door is closed, argon gas is introduced for 60-120 minutes to remove the air in furnace, and heated from room temperature to 500 degrees C for calcining for 2 hours with heating speed of 5 degrees C/minute. The temperature is raised, the door is not opened and the argon gas is not closed to ensure the furnace in isolating oxygen to avoid the oxidation of elemental carbon atoms of graphene to form graphene oxide, or to generate carbon monoxide and carbon dioxide. The obtained composite titania nano tubes are put into vacuum high temperature furnace in argon gas, then naturally cooled to room temperature, the argon gas flow valve is closed, and the product is ground to obtain the desired product.