Preparation method for N-doped nanometer hollow carbon sphere

A nitrogen-doped, nano-technology, applied in the field of nano-material preparation and electrochemistry, to achieve the effect of simple process

Inactive Publication Date: 2019-01-18
NORTH CHINA ELECTRIC POWER UNIV (BAODING) +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, whether traditional carbon materials are used in supercapaci

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] The preparation of a nitrogen-doped nano-hollow carbon sphere comprises the following steps: (1) first mix 1, 24, and 80 mL of ammonia water, absolute ethanol, and deionized water, and place the mixed solution on a magnetic stirrer to stir for 30 minutes; (2) Add 1 mL of tetraethyl orthosilicate to the mixed solution, and continue to stir on a magnetic stirrer for 15 minutes; (3) Then add dopamine hydrochloride solution with a concentration of 50 mg / mL dropwise into the mixed solution and place it on a magnetic stirrer. Stirring on the stirrer for 36 hours; (4) Centrifuge the completed solution with a high-speed centrifuge, wash it, and dry it at 60°C for 12 hours; (5) Finally, calcinate the dried solid at 800°C for 2 hours under nitrogen atmosphere, The heating rate of the tube furnace is 5° C. / min. After calcination, it is etched with 10% hydrofluoric acid, washed and dried to obtain nitrogen-doped nano-hollow carbon spheres.

Embodiment 2

[0035] (1) First mix 1, 24, and 80 mL of ammonia water, absolute ethanol, and deionized water, and place the mixed solution on a magnetic stirrer to stir for 30 minutes; (2) Add 0.5 mL of ethyl orthosilicate to the mixed solution ester, continue to be placed on a magnetic stirrer and stirred for 15 hours; (3) then the dopamine hydrochloride solution with a concentration of 50mg / mL was added dropwise to the mixed solution and placed on a magnetic stirrer to stir for 36h; (4) the reaction was completed The solution was centrifuged and washed with a high-speed centrifuge, and dried at 60°C for 12 hours; (5) Finally, the dried solid was calcined for 2 hours at 800°C under a nitrogen atmosphere, and the heating rate of the tube furnace was 5°C / min. After calcining, Etching with 10% hydrofluoric acid, washing and drying can obtain nitrogen-doped nano hollow carbon spheres.

[0036] Comparative Example 1:

[0037] This example is one of the comparative examples of Example 2 above. ...

Embodiment 3

[0046] (1) First mix 1, 24, and 80 mL of ammonia water, absolute ethanol, and deionized water, and place the mixed solution on a magnetic stirrer to stir for 30 minutes; (2) Add 0.5 mL of ethyl orthosilicate to the mixed solution ester, continue to be placed on a magnetic stirrer and stirred for 15 hours; (3) then the dopamine hydrochloride solution with a concentration of 20mg / mL was added dropwise to the mixed solution and placed on a magnetic stirrer to stir for 36h; (4) the reaction was completed The solution was centrifuged and washed with a high-speed centrifuge, and dried at 60°C for 12 hours; (5) Finally, the dried solid was calcined for 2 hours at 800°C under a nitrogen atmosphere, and the heating rate of the tube furnace was 5°C / min. After calcining, Etching with 10% hydrofluoric acid, washing and drying can obtain nitrogen-doped nano hollow carbon spheres.

[0047] Comparative Example 1:

[0048]This example is one of the comparative examples of Example 3 above.

...

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PUM

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Abstract

The invention discloses a preparation method for an N-doped nanometer hollow carbon sphere. The method comprises the following steps: firstly, mixing ammonium hydroxide of a certain volume concentration, absolute ethyl alcohol and deionized water; placing the mixed solution onto a magnetic stirrer for stirring; adding a certain volume of ethyl orthosilicate into the mixed solution, continuing to put onto the magnetic stirrer and fully stirring the solution, thereby acquiring the silicon dioxide sphere; preparing dopamine hydrochloride solid into a solution with a certain concentration, dropwise adding the solution into the mixed solution, putting onto the magnetic stirrer and stirring; using a high speed centrifuge for centrifugally separating and cleaning the solution after the ending ofsolution, and then putting the solid into a drying oven for drying; calcining the solid under a nitrogen environment under high temperature and putting into a hydrofluoric acid with a certain concentration for etching; lastly, washing and drying the etched solid, thereby acquiring the N-doped nanometer hollow carbon sphere. The preparation method is simple, high in operability and pollution-free;the material has the advantages of porosity, abundant ducts, large specific surface area, and the like; the N-doped nanometer hollow carbon sphere can be used as an electrode material in a supercapacitor and meanwhile can be used as an adsorbent for absorbing bisphenol A, so that the material is multifunctional.

Description

technical field [0001] The invention relates to a nano-carbon material and a preparation method thereof, in particular to a preparation method of nitrogen-doped nano-hollow carbon spheres, belonging to the technical fields of nano-material preparation and electrochemistry. Background technique [0002] With the rapid development of the economy, people's living standards continue to improve, and their consumption capacity is gradually expanding. For a long time, people have excessively developed the materials and energy on the earth, consumed a lot of energy in the process of production and processing, and at the same time discharged a large amount of "waste" into the environment in the process of consumption. This has led to increasingly acute contradictions between environmental pollution, energy shortage and economic development, and has made it a bottleneck restricting the further development of my country's economic society, and will also become an important limiting fac...

Claims

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Application Information

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IPC IPC(8): B01J20/20B01J20/28B01J20/30C02F1/28C02F101/34
CPCB01J20/02B01J20/205B01J20/28021B01J20/28057B01J20/28095C02F1/281C02F1/283C02F2101/345
Inventor 张一梅欧萍王飞赖毓娴武盼盼
Owner NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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