Heteroatom-doped carbon microsphere and preparation method thereof

Abstract

The invention relates to a heteroatom-doped carbon microsphere. The carbon microsphere is composed of a carbon nanoparticle with a hierarchical pore structure. The carbon nanoparticle has micropores with pore sizes of 2 nm, mesopores with pore sizes of 2 to 50 nm and large pores with pore sizes of more than 50 nm; the BET specific surface area of the carbon nanoparticle is 300 to 1000 m2 / g; the content of heteroatoms in the carbon nanoparticle is 2 to 25 wt%; and the heteroatoms are at least one selected from the group consisting of nitrogen, phosphorus, sulfur and boron. The invention also discloses a preparation method for the carbon microsphere.

Description

technical field [0001] The invention belongs to the field of carbon material preparation, and furthermore relates to a heteroatom-doped carbon microsphere with a hierarchical porous structure composed of carbon nanoparticles with a hierarchical porous structure and a preparation method thereof. Background technique [0002] Porous carbon materials usually have excellent properties such as large specific surface area, good thermal and chemical stability, low electrical resistance, and good surface hydrophobicity. They are used in toxic gas adsorption, wastewater treatment, lithium-ion batteries, super capacitors, CO 2 Capture, catalyst and catalyst carrier have good application prospects. Recently, researchers have found that the electronic structure, crystal structure, and hydrophilicity of carbon materials can be changed by heteroatom doping. The specific capacitance of chemically doped carbon materials is generally increased compared to undoped carbon materials. In recen...

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Problems solved by technology

However, the addition of a large amount of strong base KOH requires the use of a large amount of acid for neutralization and washing during post-treatment, which makes the preparation process complicated

It can be seen that it is still a challenge to prepare heteroatom-doped porous carbon materials using simple methods, and it is even more difficult to prepare heteroatom-doped carbon materials with micropores, mesopores, and macropores at the same time.

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