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A nitrogen-doped porous carbon fiber material and its preparation method and application

A technology of nitrogen-doped porous carbon and fiber materials, applied in the fields of fiber chemical characteristics, textiles and papermaking, electrical components, etc., can solve the problems of not being widely used in the fields of energy and environment, complex synthesis methods, and incapable of large-scale preparation. The effect of low price, high specific surface area and good electrochemical performance

Active Publication Date: 2015-09-30
赤峰福纳康生物技术有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Nitrogen-doped carbon-based materials are widely used in various fields as a new type of carbon material, but the main problems are: (1) The cost of raw materials is high, and it cannot be widely used in the fields of energy and environment; (2) The synthesis method is complicated , and cannot be produced in large quantities

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  • A nitrogen-doped porous carbon fiber material and its preparation method and application
  • A nitrogen-doped porous carbon fiber material and its preparation method and application
  • A nitrogen-doped porous carbon fiber material and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Example 1. Preparation of nitrogen-doped porous carbon fiber material and its electrochemical performance test

[0033] Heat 1000mL of an aqueous solution containing 0.64g citric acid and 1.26g melamine (the molar ratio of melamine to citric acid is 3:1) and stir (80°C) until the melamine is completely dissolved; then cool to 4°C for standing precipitation, and white crystals are precipitated. After filtering and drying, it is the precursor of the combination of melamine and citric acid. Put 5g of the above precursor into a quartz tank, spread it evenly, put it into a tube furnace, first pass Ar gas for 10 minutes, the Ar gas flow rate is 50ml / min, and then increase the temperature to 900 °C at a rate of 2 °C / min. Keep calcining for 4 hours; then cool to room temperature under the condition of Ar gas to obtain nitrogen-doped porous carbon fiber material.

[0034] 1) Characterization of nitrogen-doped porous carbon fiber materials:

[0035] The morphology of the nitrog...

Embodiment 2

[0041] Example 2, Preparation of nitrogen-doped porous carbon fiber material and its electrochemical performance test

[0042] Heat 1000mL of an aqueous solution containing 0.64g citric acid and 1.29g cyanuric acid (the molar ratio of cyanuric acid to citric acid is 3:1) and stir (60°C) until the cyanuric acid is completely dissolved; then cool to 4°C After static precipitation, white crystals are precipitated, filtered and dried, which is the precursor of the combination of cyanuric acid and citric acid. Put 5g of the above precursor into a quartz tank, spread it evenly, put it into a tube furnace, first pass Ar gas for 10 minutes, the Ar gas flow rate is 50ml / min, and then increase the temperature to 800°C at a rate of 4°C / min. Calcined for 2 hours; then cooled to room temperature under Ar gas conditions to obtain a nitrogen-doped porous carbon fiber material.

[0043] Electrochemical performance characterization of nitrogen-doped porous carbon fiber material: The positive ...

Embodiment 3

[0044] Example 3, Preparation of nitrogen-doped porous carbon fiber material and its electrochemical performance test

[0045] Heat 1000mL of an aqueous solution containing 0.90g oxalic acid and 1.26g melamine (the molar ratio of melamine to oxalic acid is 1:1) and stir (100°C) until the melamine is completely dissolved; then cool to 4°C for standing precipitation, and white crystals are precipitated, filtered and dried , which is the precursor of the combination of cyanuric acid and oxalic acid. Put 5g of the above-mentioned precursor into a quartz tank, spread it evenly, put it into a tube furnace, first pass Ar gas for 10 minutes, the Ar gas flow rate is 50ml / min, and then increase the temperature to 900 °C at a rate of 4 °C / min. Calcined for 2 hours; then cooled to room temperature under Ar gas conditions to obtain a nitrogen-doped porous carbon fiber material.

[0046] Electrochemical performance characterization of nitrogen-doped porous carbon fiber material: The positi...

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Abstract

The invention discloses a nitrogen-doped porous carbon fiber material and a preparation method and application thereof. The preparation method comprises the following steps: (1) dissolving a nitrogen source and a carbon source in water, standing, precipitating and filtering to obtain a precursor formed by combining the nitrogen source and the carbon source, wherein the nitrogen source is melamine and / or cyanuric acid, and the carbon source is an organic acid and / or organic amine; (2) calcining the precursor in a tube furnace, thus obtaining the nitrogen-doped porous carbon fiber material. The melamine provided by the invention can be dissolved in a hot aqueous solution and can be assembled with the organic acid through the acting force between amino and carboxyl and the acting force of the hydrogen bond, a white precipitate is separated out through cooling treatment and serves as the precursor, the precursor is calcined at high temperature under inert gas conditions after filtering and drying, and thus the black nitrogen-doped porous carbon fiber material is obtained. The material is mild, simple and convenient in synthesis conditions and low in raw material price and has high specific surface area and good electrochemical performance.

Description

technical field [0001] The invention relates to a nitrogen-doped porous carbon fiber material and a preparation method and application thereof. Background technique [0002] By doping heteroatoms in carbon-based materials, the properties of the material itself, such as electrical conductivity, optical properties, and surface chemical characteristics, can be adjusted. Since the electronegativity (3.5) of nitrogen atoms is higher than that of carbon atoms (3.0), and has comparable atomic size and electronic valence states that can form bonds with carbon atoms, in recent years, nitrogen-doped carbon-based materials been constantly reported. Nitrogen-doped carbon-based materials are widely used in various fields as a new type of carbon material. The main problems currently facing are: (1) The cost of raw materials is high, and it cannot be widely used in the fields of energy and environment; (2) The synthesis method is complicated. , and cannot be produced in large quantities....

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D01F9/12H01M4/583H01M4/96
CPCY02E60/50Y02E60/10
Inventor 舒春英栗瑞敏王春儒
Owner 赤峰福纳康生物技术有限公司
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