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A kind of heteroatom-doped carbon nano-microsphere and its preparation method

A nano-microsphere, carbon nano-technology, applied in the direction of nano-carbon, can solve the problems of long time, high reaction temperature, complicated operation, etc., to achieve the effect of fast reaction, simple process, and favorable for popularization and application.

Active Publication Date: 2021-07-16
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The reaction temperature is high, the time is long, and the operation is complicated

Method used

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  • A kind of heteroatom-doped carbon nano-microsphere and its preparation method
  • A kind of heteroatom-doped carbon nano-microsphere and its preparation method
  • A kind of heteroatom-doped carbon nano-microsphere and its preparation method

Examples

Experimental program
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Effect test

Embodiment 1

[0071] Dissolve 10g (0.08mol) of melamine and 3.01g (0.016mol) of 2,4-diaminobenzenesulfonic acid in 2000mL of water, add dropwise 5mL of ammonia water, stir at 25°C and 500rpm until the solution is uniform and transparent. Add 50 mL of formaldehyde solution, and after about 3 minutes, the liquid becomes obviously turbid. Keep at 25°C, stir at 500rpm for 2 hours, centrifuge, wash and dry, and observe with electron microscope, as shown in figure 1 As shown, the nano-microspheres are uniform, and the average particle diameter is 512nm.

Embodiment 2

[0073] Dissolve 0.19g (0.0015mol) of melamine and 0.058g (0.0003mol) of 2,4-diaminobenzenesulfonic acid in 50mL of water, add 0.1mL of ammonia water dropwise, at 5°C, 15°C, 25°C, 35°C, 45°C Next, stir at a stirring speed of 500rpm until the solution is uniform and transparent. Add 1.2 mL of formaldehyde solution, and after about 45 seconds, the liquid turns from clear to cloudy. Keeping the temperature, stir at 500rpm for 2 hours. After the reaction is completed, centrifugation, washing, drying, and electron microscope observation are performed to obtain nitrogen-sulfur-containing polymer nanometer microspheres. Such as figure 2 As shown, the temperature conditions of a to e are 5°C, 15°C, 25°C, 35°C, and 45°C in sequence. The nanospheres are uniform and the average particle diameters are 148nm, 257nm, 513nm, 627nm, and 845nm.

Embodiment 3

[0075] 0.19g (0.0015mol) melamine, 0.0145g (0.000075mol), 0.029g (0.00015mol), 0.058g (0.0003mol), 0.116g (0.0006mol), 0.174g (0.0009mol) 2,4-diaminobenzene Dissolve the sulfonic acid in 50mL of water, add 0.1mL of ammonia water dropwise, and stir at 25°C at a stirring speed of 500rpm until the solution is uniform and transparent. Add 1.2 mL of formaldehyde solution, and after about 45 seconds, the liquid turns from clear to cloudy. Keep at 25°C and stir at 500rpm for 2 hours. After the reaction is completed, centrifugation, washing, drying, and electron microscope observation are performed to obtain nitrogen-sulfur-containing polymer nanometer microspheres. Such as image 3 As shown, the dosage of a~e2,4-diaminobenzenesulfonic acid is 0.0145g (0.000075mol), 0.029g (0.00015mol), 0.058g (0.0003mol), 0.116g (0.0006mol), 0.174g (0.0009mol ), the nanospheres are uniform, and the average particle size is 793nm, 624nm, 496nm, 307nm, 169nm.

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Abstract

The invention discloses a heteroatom-doped carbon nanosphere and a preparation method thereof; the method is to adopt a mild reaction temperature (10-50° C.) under stirring conditions, and use aromatic amine and aldehyde as raw materials in the following In the presence of the compound represented by the general formula I, in the aqueous solution system, the Schiff base is generated through the aldehyde and the compound represented by the general formula I, and the aromatic amine is added to the generated Schiff base to obtain polymer nanospheres, which are centrifuged and dried Finally, it is prepared after firing under an inert gas atmosphere. The process method of the invention has the advantages of simple operation, mild conditions and fast reaction; the size and shape of the nano-microsphere product prepared by the method are controllable, the particle size is uniform, the output is large, and the heteroatom doping is uniform. It has a good application prospect.

Description

technical field [0001] The invention belongs to the technical field of nano new materials, and in particular relates to a heteroatom-doped carbon nano microsphere and a preparation method thereof. Background technique [0002] Heteroatom-doped carbon nanospheres have great application potential in energy conversion and storage, carbon dioxide adsorption and separation, removal of metal ions in water, gas storage and separation, and catalysis, and have received extensive attention in recent years. Doping non-metallic heteroatoms on the carbon atom skeleton, such as sulfur, nitrogen, boron, phosphorus or multiple heteroatoms, can effectively improve its application performance. For example, it has been found that sulfur and nitrogen double-doped graphene materials have Synergistic effect, better oxygen reduction performance than undoped graphene; the presence of heteroatoms can endow carbon materials with good electrical conductivity, chemical stability and catalytic performan...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B32/15
CPCC01B32/15
Inventor 吕荣文刘明辉刘盈岑林华
Owner DALIAN UNIV OF TECH