Titanium dioxide doped carbon nitride, and preparation method and application thereof
A technology of titanium dioxide and carbon nitride, applied in electrical components, non-aqueous electrolyte batteries, circuits, etc., can solve the problems of low coulombic efficiency and poor cycle stability of lithium-sulfur batteries
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[0037] See figure 1 , The preparation method of titanium dioxide doped carbon nitride in one embodiment includes the following steps:
[0038] S110, preparing carbon nitride.
[0039] In one of the embodiments, the step of preparing carbon nitride specifically includes the following steps:
[0040] S111: Disperse melamine in methanol to obtain a methanol dispersion of melamine.
[0041] In one of the embodiments, the mass ratio of melamine to methanol is 1:5 to 1:20.
[0042] In one of the embodiments, the melamine is added to methanol and then subjected to stirring treatment, the stirring treatment time is 1 h to 4 h, and the rotation speed of the stirring treatment is 80 r / min to 200 r / min.
[0043] S112, adding concentrated hydrochloric acid to the methanol dispersion of melamine to obtain a mixed solution.
[0044] In one of the embodiments, the mass concentration of concentrated hydrochloric acid is 20% to 37%.
[0045] In one of the embodiments, the dosage ratio of melamine to concen...
Example Embodiment
[0112] Example 1
[0113] Disperse 5 g of melamine in 75 g of methanol and stir for 1 hour to obtain a methanol dispersion of melamine, then add 5 mL of concentrated hydrochloric acid with a mass concentration of 37% to the methanol dispersion of melamine, and continue stirring for 1 hour to obtain a mixed solution. Place the mixed solution in a vacuum drying box, evaporate methanol and the like to obtain an intermediate product, and then heat the intermediate product at 600° C. to obtain carbon nitride under a nitrogen atmosphere. Add 1g of carbon nitride to 50mL of concentrated nitric acid with a mass concentration of 95% for ultrasonic treatment. The power of the ultrasonic treatment is 100W and the time of ultrasonic treatment is 15h; then the carbon nitride is washed alternately with water and alcohol to Neutral to obtain stripped carbon nitride, the specific surface area of stripped carbon nitride is 160m 2 / g.
[0114] 0.2g of stripped carbon nitride was added to 40 mL of...
Example Embodiment
[0116] Example 2
[0117] Disperse 10 g of melamine in 100 g of methanol and stir for 1 hour to obtain a methanol dispersion of melamine, then add 200 mL of concentrated hydrochloric acid with a mass concentration of 20% to the methanol dispersion of melamine, and continue stirring for 4 hours to obtain a mixed solution. Place the mixed solution in a vacuum drying box, evaporate methanol and the like to obtain an intermediate product, and then heat the intermediate product at 550° C. under a nitrogen atmosphere to obtain a carbon nitride initial product. Add 1g of the initial carbon nitride product to 50mL of concentrated nitric acid with a mass concentration of 95% for ultrasonic treatment. The power of ultrasonic treatment is 100W and the time of ultrasonic treatment is 10h; The product is washed to neutrality to obtain carbon nitride, the specific surface area of carbon nitride is 180m 2 / g.
[0118] 0.2g of stripped carbon nitride was added to 120 mL of sodium hydroxide aque...
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