Preparation method of extreme-micropore-enriched carbon material based on carboxylation anchoring effect

Abstract

The invention provides a preparation method of an extreme-micropore-enriched carbon material based on a carboxylation anchoring effect. The preparation method comprises the following steps: (1) pretreating, cleaning, drying and crushing waste biomass; (2) impregnating biomass particles in a micromolecular organic carboxylic acid solution, performing drying in a blast drying oven, reacting the dried material at 100-200 DEG C for 1-12h, washing the material with water until the material is neutral, and performing drying to obtain a carboxylated material; (3) under the condition that the temperature is 50-150 DEG C, soaking the carboxylated material into an alkali metal hydroxide solution with the concentration of 0.1-2 mol / L, carrying out ion exchange for 1-24 hours, uniformly distributing metal ions on the surface of the material under the anchoring action of carboxyl, performing washing with water to remove excessive alkali until the material is neutral, and performing drying; and (4)finally, putting the obtained material into a tubular furnace, carrying out high-temperature carbonization in an N2 atmosphere, and performing washing with water and drying to obtain a final product,namely the rich-electrode microporous carbon material.

Description

technical field [0001] The invention relates to the field of activated carbon production, in particular to a method for preparing a carbon material rich in extremely microporous carbons based on carboxylation anchoring. Background technique [0002] Porous carbon material is a carbon material with pore structures of different sizes. It has a highly developed specific surface area and pore structure. As a new material, it has excellent physical and chemical properties, such as electrical conductivity, heat conduction, high temperature resistance, and corrosion resistance. It shows excellent application prospects in catalysis, lithium battery electrode materials, adsorption, ammonia storage, hydrogen storage, capacitors and other fields. [0003] Porous carbon adsorption technology has great development and application potential, and the rational design of porous carbon materials is crucial to its adsorption performance. Activated carbon is an effective adsorbent that can be ...

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Problems solved by technology

However, this activated carbon preparation method needs to be physically mixed with 3-4 times the chemical activation reagent of the carbon precursor and calcined at a high temperature to prepare an excellent pore structure, resulting in the consumption of a large amount of chemical reagents during the preparation of activated carbon and causing environmental pollution. ; A large number of strong acids, strong alkalis and alkali metal salts under high temperature conditions not only cause corrosion to instruments and equipment, but also easily cause the collapse of extremely micropores and form mesopores or even macropores, which is not conducive to the adsorption of small molecule pollutants removal, and more importantly, the method of physical impregnation coupled with pyrolysis cannot adjust the pore structure of the activated carbon in an orderly manner, resulting in the pore structure of the prepared activated carbon showing irregular pore size and disorder

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