Heteroatom-doped carbon nanometer microsphere and preparation method thereof

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

Active Publication Date: 2018-11-23
DALIAN UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The reaction temperature is high, the time

Method used

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  • Heteroatom-doped carbon nanometer microsphere and preparation method thereof
  • Heteroatom-doped carbon nanometer microsphere and preparation method thereof
  • Heteroatom-doped carbon nanometer microsphere and preparation method thereof

Examples

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Example Embodiment

[0070] Example 1

[0071] 10g (0.08mol) of melamine and 3.01g (0.016mol) of 2,4-diaminobenzenesulfonic acid were dissolved in 2000mL of water, 5mL of ammonia was added dropwise, and stirred at a temperature of 25°C at 500rpm until the solution became uniform and transparent. After adding 50 mL of aqueous formaldehyde solution, after about 3 minutes, the liquid appeared turbid. Keep at 25°C, stir at 500 rpm for 2 hours, centrifuge, wash, and dry, and conduct electron microscope observation, such as figure 1 As shown, the nano-microspheres are uniform with an average particle size of 512 nm.

Example Embodiment

[0072] Example 2

[0073] Dissolve 0.19g (0.0015mol) melamine and 0.058g (0.0003mol) 2,4-diaminobenzenesulfonic acid in 50mL water, add 0.1mL ammonia water dropwise, 5℃, 15℃, 25℃, 35℃, 45℃ temperature Stir under 500rpm speed stirring until the solution is uniform and transparent. 1.2 mL of aqueous formaldehyde solution was added. After about 45 seconds, the liquid changed from clear to turbid. Keep the temperature and stir at 500 rpm for 2 hours. After the reaction is completed, centrifugation, washing, drying, and electron microscope observation are performed to obtain nitrogen-sulfur polymer nanospheres. 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 nano-microspheres are uniform, and the average particle size is 148nm, 257nm, 513nm, 627nm, 845nm.

Example Embodiment

[0074] Example 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 The sulfonic acid was dissolved in 50 mL of water, 0.1 mL of ammonia was added dropwise, and stirred at a temperature of 25° C. and a stirring speed of 500 rpm until the solution became uniform and transparent. 1.2 mL of aqueous formaldehyde solution was added. After about 45 seconds, the liquid changed from clear to turbid. Keep at 25°C and stir at 500 rpm for 2 hours. After the reaction is completed, centrifugation, washing, drying, and electron microscope observation are performed to obtain nitrogen-sulfur polymer nanospheres. 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 nano-microspheres are uniform, and the average particle size is 793nm, 624nm, 496nm, 307nm...

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Abstract

The invention discloses a heteroatom-doped carbon nanometer microsphere and a preparation method thereof. The preparation method comprises the following steps of under the stirring condition, adoptingthe moderate reaction temperature of 10 to 15 DEG C, and using aromatic amine and formaldehyde as raw materials; under the existence of a compound shown in a formula I, enabling aldehyde and the compound shown in the formula I to generate Schiff base in a water solution system, and performing addition reaction on aromatic amine and the generated Schiff base to obtain polymer nanometer microsphere; centrifuging and drying; roasting under the inert gas atmosphere, so as to obtain the heteroatom-doped carbon nanometer microsphere. The technology method has the advantages that the operation is simple, the conditions are moderate, and the reaction is quick. The prepared heteroatom-doped carbon nanometer microsphere has the advantages that the size and shape are controllable, the granularity isuniform, the output is high, and the heteroatom is uniformly doped; the application prospect is good. The formula I is shown in the attached figure.

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