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Preparation method of magnetic nitrogen-doped carbon materials

A nitrogen-doped carbon and magnetic technology, which is applied in the manufacture of inductors/transformers/magnets, electrical components, circuits, etc., can solve problems such as the difficulty of controlling the amount of nitrogen doping, achieve low cost, mild reaction conditions, and ensure magnetic effects

Active Publication Date: 2013-09-11
合肥碳艺科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, due to the restriction of the nitrogen content in the precursor, the nitrogen doping amount is difficult to control

Method used

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  • Preparation method of magnetic nitrogen-doped carbon materials
  • Preparation method of magnetic nitrogen-doped carbon materials
  • Preparation method of magnetic nitrogen-doped carbon materials

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] (1) Mix absolute ethanol and deionized water at a volume ratio of 1:1 to form a mixed solvent of 40mL, and adjust the pH of the solution to 2 with concentrated hydrochloric acid;

[0028] (2) 0.60g ferric chloride hexahydrate (FeCl 3 ·6H 2 O) and 1.50 g of sucrose were added to the mixed solvent in turn, and stirred for 20 minutes;

[0029] (3) Add 0.033g glycine to the mixed solvent and stir for 0.5 hours;

[0030] (4) Put the mixed system in a blast oven, evaporate the solvent at 60°C, and then carbonize at 80°C for 40 hours to obtain a carbonized product;

[0031] (5) After the primary carbonization product is ground, it is placed in a blast oven and carbonized at 200°C for 4 hours to obtain a magnetic nitrogen-doped carbon material. The nitrogen content of the nitrogen-doped carbon material is 0.93%.

Embodiment 2

[0033] (1) Mix absolute ethanol and deionized water at a volume ratio of 1:1.5 to form a mixed solvent of 40mL, and adjust the pH of the solution to 1 with concentrated hydrochloric acid;

[0034] (2) 0.60g ferric chloride hexahydrate (FeCl 3 ·6H 2 O) and 1.20 g of glucose were added to the mixed solvent in turn, and stirred for 20 minutes;

[0035] (3) Add 0.062g glycine to the mixed solvent and stir for 0.5 hours;

[0036] (4) Put the mixed system in a blast oven, evaporate the solvent at 70°C, and then carbonize at 60°C for 40 hours to obtain a carbonized product;

[0037] (5) After the primary carbonization product is ground, it is placed in a blast oven and carbonized at 190°C for 6 hours to obtain a magnetic nitrogen-doped carbon material. The nitrogen content of the nitrogen-doped carbon material was 2.1%.

Embodiment 3

[0039] (1) Mix absolute ethanol and deionized water at a volume ratio of 1:2 to form a mixed solvent of 40mL, and adjust the pH of the solution to 2 with concentrated hydrochloric acid;

[0040] (2) 0.60g ferric chloride hexahydrate (FeCl 3 ·6H 2 O) and 1.80g cornstarch were added to the mixed solvent in turn, and stirred for 20 minutes;

[0041] (3) Add 0.167g glycine to the mixed solvent and stir for 0.5 hours;

[0042] (4) Put the mixed system in a blast oven, evaporate the solvent at 65°C, and then carbonize at 80°C for 48 hours to obtain a carbonized product;

[0043] (5) After the primary carbonization product is ground, it is placed in a blast oven and carbonized at 190°C for 6 hours to obtain a magnetic nitrogen-doped carbon material. The nitrogen content of the nitrogen-doped carbon material was 3.2%.

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Abstract

The invention provides a preparation method of magnetic nitrogen-doped carbon materials. The method includes: using concentrated hydrochloric acid to adjust pH of mixed solvent of anhydrous ethanol and deionized water to 1-3, sequentially and fully dissolving or dispersing oxidation carbonization agent (ferric chloride hexahydrate), carbon source (saccharides), nitrogen source (glycine or melamine), mixing well, evaporating solvent, carbonizing at 60-80 DEG C for 40-50 hours, grinding carbonized products, and carbonizing the ground carbonized products at 180-200 DEG C for 4-6 hours to obtain the magnetic nitrogen-doped carbon materials which are promising in application prospect in fields such as fuel cell catalysts and super capacitors. The preparation method is mild in reaction condition, low in cost, simple to operate, and easy to control nitrogen contents in the nitrogen-doped carbon materials.

Description

technical field [0001] The invention belongs to the technical field of carbon materials, and relates to a method for preparing a nitrogen-doped carbon material, in particular to a method for preparing a magnetic nitrogen-doped carbon material. Background technique [0002] Carbon is the most important constituent element of all organisms on earth. The different bonding methods between carbon atoms lead to the formation of a variety of carbon materials in different forms, including soft and creamy graphite with a common layered structure, and precious hard diamond with a tetrahedral structure. Carbon materials are widely used in metallurgy, chemical industry, machinery, electricity, aviation and other fields due to their excellent heat resistance, high thermal conductivity, good chemical inertness, and high electrical conductivity. In recent years, carbon materials have also received great attention in the field of electrochemical applications, especially in the application ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01F41/00
Inventor 王荣方康健王辉
Owner 合肥碳艺科技有限公司
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