Preparation method of metal-nitrogen-doped porous carbon microspheres

Abstract

The invention discloses a preparation method of metal-nitrogen-doped porous carbon microspheres. According to the preparation method, a 4VP (4-vinyl pyridine) monomer is taken as a carbon and nitrogen source, different metal salts are taken as an initiator, a coordination agent, a catalyst and a template agent, firstly, the 4VP monomer is polymerized at the normal temperature by utilizing the metal salts as the initiating agent, a metal-coordination structure is formed by metal ions and nitrogen atoms in 4VP molecules, and metal-organic matter microspheres are formed; then metal in the microspheres has functions of the catalyst and the template agent at the high temperature, so that organic matter is converted into carbon, a spherical structure is reserved, and the metal-nitrogen-doped porous carbon microspheres are obtained after acid pickling. Selectivity of metal sources is high, steps are simple, and the prepared nitrogen-doped porous carbon material is large in specific surface area and high in nitrogen content. By means of large specific surface area and high nitrogen content, the material has huge application prospect in the fields of energy storage and conversion, catalysis and environment protection.

Description

technical field [0001] The invention belongs to the technical field of functional materials, and in particular relates to a preparation method of metal-nitrogen doped porous carbon microspheres. Background technique [0002] Porous carbon has the characteristics of wide source of raw materials, good physical and chemical stability, large specific surface area, large pore volume, good electrical conductivity, high temperature resistance, acid and alkali resistance, etc. It is widely used in electrode materials, catalysis and catalyst carriers, gas adsorption separation and water Purification and many other fields. Studies have shown that the main factors affecting the performance of porous carbon are pore structure and surface chemical properties. In recent years, the research on the surface chemical properties of porous carbon has become a hot spot, mainly by introducing heteroatoms into the carbon skeleton, such as N, O, B, S, P, etc. The introduction of heteroatoms into ...

AI Technical Summary

Problems solved by technology

Chemical nitrogen doping refers to the existence of nitrogen atoms on the surface of carbon materials in the form of surface functional groups, providing B-base sites for materials, such as amino groups and other surface nitrogen-containing functional groups. Such nitrogen-containing functional groups are highly alkaline and prone to chemical reactions. However, its stability is poor, and it is easy to decompose and fall off at high temperature.

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