Preparation method of high-dielectric-constant titanium dioxide/graphene composite material
A technology of high dielectric constant and titanium dioxide, applied in the field of materials, can solve the problem of low dielectric constant and achieve the effect of improving dielectric constant, simple preparation process and low cost
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Embodiment 1
[0025] Mix 1 mL of tetrabutyl titanate with 15 mL of ethanol and 5 mL of glycerin, stir for 10 min to make it uniform, then place the mixed liquid in a 50 mL reaction kettle, and react at 180°C for 12 h. After the reaction, the reaction product was centrifugally washed with water and then with ethanol, and then dried at 60° C. to obtain a titanium glyceride precursor. Using a muffle furnace, the precursor was calcined at 450° C. for 2 h with a heating rate of 1° C. / min to obtain anatase titanium dioxide powder. Then add 5 mg of graphene oxide into 10 mL of water and 5 mL of ethanol, ultrasonically stir for 1 hour to disperse evenly, then add 50 mg of the aforementioned anatase-type titanium dioxide powder, ultrasonically and stir for 30 min to disperse evenly, and place the mixture in a 50 mL reaction Reactor at 120°C for 8h. After the reaction is finished, the reaction product is centrifugally washed with water and then with ethanol, and then dried at 60° C. to obtain a tita...
Embodiment 2
[0029] Mix 2 mL of tetrabutyl titanate with 30 mL of ethanol and 10 mL of glycerin, stir for 10 min to make it uniform, then place the mixed liquid in a 100 mL reactor, and react at 150°C for 24 h. After the reaction, the reaction product was filtered and washed with water and then with ethanol, and then dried at 60° C. to obtain a titanium glyceride precursor. Using a muffle furnace, the precursor was calcined at 450° C. for 4 h with a heating rate of 1.5° C. / min to obtain anatase titanium dioxide powder. Then add 10 mg of graphene oxide into 20 mL of water and 10 mL of ethanol, ultrasonically stir for 1 hour to disperse evenly, then add 100 mg of the aforementioned anatase-type titanium dioxide powder, ultrasonically and stir for 30 min to disperse evenly, and place the mixture in a 100 mL reaction In the kettle, react at 150°C for 5h. After the reaction is finished, the reaction product is suction-filtered and washed with water and then ethanol, and then dried at 60° C. to...
Embodiment 3
[0033] Mix 2mL of tetrabutyl titanate with 30mL of ethanol and 10mL of glycerin, stir for 10min to make it uniform, then put the mixed liquid in a 100mL reactor, and react at 160°C for 18h. After the reaction, the reaction product was filtered and washed with water and then with ethanol, and then dried at 60° C. to obtain a titanium glyceride precursor. Using a muffle furnace, the precursor was calcined at 450° C. for 3 h with a heating rate of 2° C. / min to obtain anatase titanium dioxide powder. Then add 10 mg of graphene oxide into 20 mL of water and 10 mL of ethanol, ultrasonically stir for 1 hour to disperse evenly, then add 100 mg of the aforementioned anatase-type titanium dioxide powder, ultrasonically and stir for 30 min to disperse evenly, and place the mixture in a 100 mL reaction Reactor at 130°C for 10h. After the reaction is finished, the reaction product is suction-filtered and washed with water and then ethanol, and then dried at 60° C. to obtain a titanium dio...
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