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Method for preparing high-nitrogen-doped graphitized porous carbon material by metal nitrate catalytic carbonization method

A nitrate-catalyzed carbon and porous carbon material technology, applied in chemical instruments and methods, carbon compounds, non-metallic elements, etc., can solve the problems of limiting the application of nitrogen-doped carbon materials, low nitrogen doping content, and complicated preparation steps, etc. Achieve the effects of excellent supercapacitor performance, high nitrogen doping content, and low fabrication cost

Pending Publication Date: 2021-12-17
ANHUI UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This method can increase the amount of nitrogen doping in the product, but the preparation steps are cumbersome, the preparation cost is high, and the nitrogen in the product is easy to decompose at high temperature, the nitrogen doping content is low, and the degree of graphitization is low, which greatly limits the use of nitrogen-doped carbon materials. Applications in the Energy Field

Method used

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  • Method for preparing high-nitrogen-doped graphitized porous carbon material by metal nitrate catalytic carbonization method
  • Method for preparing high-nitrogen-doped graphitized porous carbon material by metal nitrate catalytic carbonization method
  • Method for preparing high-nitrogen-doped graphitized porous carbon material by metal nitrate catalytic carbonization method

Examples

Experimental program
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Effect test

Embodiment 1

[0020] Example 1: Weigh 10g of dicyandiamide and dissolve it in 100ml of 70°C constant temperature distilled water, then weigh 5g of zinc nitrate hexahydrate and dissolve it in the above constant temperature solution of dicyanodiamine and stir it dynamically. After stirring for 5min, place the solution Dynamically stir and evaporate in a constant temperature oil bath at 70°C until the water is evaporated and dried to obtain a solid substance. After the solid is fully ground to powder, put it into a porcelain boat and place it in a tube furnace, and feed it at a rate of 10ml / min Nitrogen, while raising the temperature of the tube furnace to 250°C at a heating rate of 10°C / min, and keeping it at 250°C for 0.5h, then continuing to heat up to 900°C and constant temperature carbonization for 1 hour to obtain a solid product, and finally washing, After drying and grinding, a nitrogen-doped graphitized porous carbon material is obtained. The prepared nitrogen-doped porous carbon mate...

Embodiment 2

[0022] Example 2: Weigh 10g of dicyandiamide and dissolve it in 100ml of 70°C constant temperature distilled water, then weigh 5g of nickel nitrate hexahydrate and dissolve it in the above constant temperature solution of dicyanodiamine and stir it dynamically. After stirring for 5min, place the solution Dynamically stir and evaporate in a constant temperature oil bath at 70°C until the water is evaporated and dried to obtain a solid substance. After the solid is fully ground to powder, put it into a porcelain boat and place it in a tube furnace, and feed it at a rate of 10ml / min Nitrogen, while raising the temperature of the tube furnace to 250°C at a heating rate of 10°C / min, and keeping it at 250°C for 0.5h, then continuing to heat up to 900°C and constant temperature carbonization for 2 hours to obtain a solid product, and finally washing, After drying and grinding, a nitrogen-doped graphitized porous carbon material is obtained.

[0023] Figure 5 It is the SEM picture o...

Embodiment 3

[0024] Example 3: Weigh 10g of dicyandiamide and dissolve it in 100ml of 70°C constant-temperature distilled water, then weigh 5g of ferric nitrate nonahydrate and dissolve it in the above-mentioned constant temperature solution of dicyanodiamine and stir dynamically. After stirring for 5min, place the solution Dynamically stir and evaporate in a constant temperature oil bath at 70°C until the water is evaporated and dried to obtain a solid substance. After the solid is fully ground to powder, put it into a porcelain boat and place it in a tube furnace, and feed it at a rate of 10ml / min Nitrogen, while raising the temperature of the tube furnace to 250°C at a heating rate of 10°C / min, and keeping it at 250°C for 0.5h, then continuing to heat up to 900°C and constant temperature carbonization for 1 hour to obtain a solid product, and finally washing, After drying and grinding, a nitrogen-doped graphitized porous carbon material is obtained.

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Abstract

The invention discloses a method for preparing a high-nitrogen-doped graphitized porous carbon material through a metal nitrate catalytic carbonization method, and belongs to the technical field of nitrogen-doped porous carbon material preparation. The preparation method comprises the following specific steps: sequentially adding dicyandiamide and metal nitrate into constant-temperature distilled water according to a certain proportion, carrying out dissolving and stirring, then heating the solution, carrying out evaporating to dryness, and carrying out grinding to obtain a solid powdery mixture, and then putting the powdery mixture into a tubular furnace for high-temperature treatment; and carrying out acid treatment, drying and grinding on the carbonized product to obtain the high-nitrogen-doped graphitized porous carbon material. The synthesis route is simple and convenient, the morphology, the structure and the composition of the carbon material can be regulated and controlled by regulating and controlling the type and the use amount of nitrate, and the prepared carbon product is high in nitrogen doping content, good in thermal stability at high temperature, high in graphitization degree and very good in hydrophilicity, shows excellent supercapacitor performance, and has the good industrial application prospects.

Description

Technical field: [0001] The invention belongs to the technical field of preparation of nitrogen-doped porous carbon materials, and in particular relates to a method for preparing high-nitrogen-doped graphitized porous carbon materials by catalytic carbonization of metal nitrates. Background technique: [0002] Carbon-based materials have a large specific surface area, good mechanical properties, thermal stability, etc., and are widely used in the fields of catalysis, adsorption, and energy. Doping heteroatoms B, N, P, S, etc. into carbon nanomaterials can change the elemental composition of carbon materials and modulate the charge structure of materials, which has important applications in the field of energy storage and conversion. Doping N atoms into carbon materials can increase the reactive functional groups in the carbon materials, enhance the wettability and chemical adsorption of the carbon material surface, enhance the interaction between the carbon material surface ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/205H01G11/42H01G11/44H01G11/24
CPCC01B32/205H01G11/42H01G11/44H01G11/24Y02E60/13
Inventor 顾敬乔雨晴赵门丁飞郜安然刘媛媛高灿李玉艳李英杰
Owner ANHUI UNIVERSITY OF TECHNOLOGY
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