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A preparation method of microporous nano-carbon spheres with uniform and regular pore size and high specific surface area

A technology of high specific surface area and carbon nanospheres, applied in the fields of nanotechnology, nanotechnology and nanotechnology for materials and surface science, can solve the problems of cumbersome preparation procedures, difficult to popularize and apply, avoid environmental pollution, The effect of easy product separation and strong solvency

Inactive Publication Date: 2015-09-09
EAST EIGHT ENERGY (SHANGHAI) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the above methods can obtain carbon nanospheres to a certain extent, the use of expensive or toxic carbon sources in the synthesis system requires the use of hydrofluoric acid, which is highly corrosive to the human body, and the preparation procedures are cumbersome. The preparation of porous carbon spheres by the above method is limited, making it difficult to promote and apply in industry

Method used

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  • A preparation method of microporous nano-carbon spheres with uniform and regular pore size and high specific surface area
  • A preparation method of microporous nano-carbon spheres with uniform and regular pore size and high specific surface area
  • A preparation method of microporous nano-carbon spheres with uniform and regular pore size and high specific surface area

Examples

Experimental program
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Effect test

Embodiment 1

[0029] (1) Mix urea and choline chloride together in a molar ratio of 2:1, stir vigorously with a glass rod, and then stir on a magnetic stirrer for 12 hours to obtain an ionic liquid;

[0030] (2) The molar ratio of the reaction mixture copper nitrate trihydrate: N-methylimidazole: ionic liquid is 5:0.5:2.5. The specific operation is as follows: take 0.073g of ionic liquid, add 0.014g of N-methylimidazole, put it in a heating mantle at 60°C while stirring and heat, after the N-methylimidazole is dissolved, then add 0.4097g of copper nitrate trihydrate, Continue to stir for 30 minutes, then put it in an oven at 60°C, take it out after 5 hours, let it cool down to room temperature naturally, filter it with suction, rinse it with distilled water for 3 times, and then put it in an oven at 80°C for drying.

[0031] (3) Finally, soak the dried sample in methanol and stir it constantly, changing the methanol every 12 hours, repeat this process twice, and let it dry naturally.

[00...

Embodiment 2

[0036]The preparation process is similar to Example 1, except that the selected metal salts, organic ligands and carbonization procedures are different. The specific differences are as follows:

[0037] The metal salt used in this example is nickel acetate tetrahydrate, the organic ligand is terephthalic acid, and the molar ratio of the reaction mixture nickel acetate, terephthalic acid, and ionic liquid is 5:1:2.5.

[0038] The specific carbonization procedure is: heating from room temperature to 300 °C at a rate of 0.5 °C / min, then heating from 300 °C to 600 °C at a rate of 0.5 °C / min, and keeping it for 5 hours, and finally cooling down to room temperature naturally.

[0039] The size of the porous nano carbon spheres obtained in this example is 70nm, the size is uniform, the pore diameter is 0.8nm, and the specific surface area is 1300m 2 / g.

Embodiment 3

[0041] The preparation process is similar to Example 1, except that the selected metal salts, organic ligands and carbonization procedures are different. The specific differences are as follows:

[0042] The metal salt used in this example is aluminum nitrate nonahydrate, the organic ligand is 2-methylimidazole, and the molar ratio of the reaction mixture aluminum nitrate nonahydrate, 2-methylimidazole, and ionic liquid is 5:0.5:2.

[0043] The specific carbonization procedure is as follows: heating from room temperature to 700 °C at a rate of 1 °C / min, keeping it for 8 hours, and then cooling down to room temperature naturally.

[0044] The size of the porous nano carbon spheres obtained in this example is 200nm, the size is uniform, the pore diameter is 1.3nm, and the specific surface area is 1700m 2 / g.

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Abstract

The invention discloses a preparation method of microporous nanocarbon balls with high specific surface area and uniform and regular aperture. The microporous nanocarbon balls with uniform aperture are obtained by synthesizing ionic liquid, preparing powder, treating the powder, carbonizing, performing aftertreatment and activating. By the mode and according to the preparation method of the microporous nanocarbon balls with high specific surface area and uniform and regular aperture, various metal salts and organic ligands can be selected to synthesize raw materials in the ionic liquid and carbonize in inert gases, and metal oxide is removed by an inorganic acid, so that the production cost is greatly reduced, the production flow is safe and reliable, the practical value is prominent, and industrialized production is promoted.

Description

technical field [0001] The invention relates to the field of preparation of porous carbon materials, in particular to a method for preparing microporous nano-carbon spheres with high specific surface area, different sizes, uniform and regular pore diameters by using metal salts and organic ligands. Background technique [0002] Carbon is one of the important elements that constitute all living organisms, and it is distributed in nature in various forms. Carbon has been regarded as an important inorganic material for a long time, and it widely exists in organic polymer materials such as cotton, silk, rubber, and plastics. The development of carbon materials is changing with each passing day, and porous nanocarbon spheres are one of the typical examples. Porous nanocarbon spheres have the advantages of low density, high specific surface area, and high stability, and have important potential applications in the fields of gas adsorption, catalytic carriers, and solar cells. [...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B31/02B82Y30/00C01B32/318C01B32/348
Inventor 于广莉
Owner EAST EIGHT ENERGY (SHANGHAI) CO LTD
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