Method for preparing pyridine nitrogen element-enriched carbon material and application thereof

Abstract

The invention provides a method for preparing a pyridine nitrogen element-enriched carbon material. The method for preparing the pyridine nitrogen element-enriched carbon material comprises a synthesis step and an activation step. The synthesis step is that high-pressure hydrothermal carbonization synthesis is carried out on a mixed solution formed by a carbon source and a solvent to obtain a carbide, wherein the carbon source is aquatic plant Enteromorpha; the activation step is that the carbide, melamine and potassium hydroxide are warmed up under a nitrogen atmosphere according to a certainratio, andcooled, washed and dried to obtain the pyridine nitrogen element-enriched carbon material. The carbon material obtained by the method has the advantages that the carbon source is abundant and renewable, and has a pore structure and nitrogen elements, and is favorable for the synthesis of the pyridine nitrogen element-enriched carbon material; the preparation process is simple and suitable for industrial application, and the process parameters are easy to control; and the carbon material has high nitrogen content, micron aperture and high specific surface area. The invention also discloses the application of the carbon material. The carbon material has a very broad application scope in the fields of carbon dioxide adsorption, electrocatalytic reaction and electrode material production.

Description

technical field [0001] The invention relates to the field of material technology, in particular to a preparation method and application of a carbon material rich in pyridinic nitrogen. Background technique [0002] Porous carbon materials are widely used in the separation / purification of substances, catalyst supports, and electrode materials due to their high specific surface area, well-developed pore structure, good electrical conductivity, strong acid and alkali resistance, and stable structure within a certain temperature range. , pharmaceutical carriers and other fields. [0003] At present, the methods for preparing porous carbon materials at home and abroad mainly include the traditional carbonization activation method and the template method: [0004] 1. The activation method is often a disordered porous carbon material, and it is difficult to control its pore shape and pore size. [0005] 2. The template method must first synthesize a soft template (polymer) or a h...

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Problems solved by technology

[0004] 1. The activation method is often a disordered porous carbon material, and it is difficult to control its pore shape and pore size

[0005] 2. The template method must first synthesize a soft template (polymer) or a hard template metal-organic framework (MOF) as a template.

[0006] The preparation of carbon materials by the above two methods has the following defects: (1) raw materials are not easy to obtain and expensive; (2) the pore size distribution is poor (some pore sizes are too large); (3) the steps are cumbersome and the process parameters are difficult to control; (4) the surface area Low, some surfaces are not loaded with heteroatoms resulting in poor conductivity and wettability

In addition, the nitrogen-doped porous carbon materials prepared by the current research rarely report the structure of pyridinic nitrogen, and pyridinic nitrogen can greatly promote the electrochemical performance.

Therefore, the existing technology makes its electrochemical performance as a supercapacitor poor, or its adsorption performance as an adsorption material is not high, or it is difficult to produce in large quantities in the actual industry

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