Template-free synthesis of tannic acid-based porous polymer and derived carbon material thereof under mild condition

Abstract

The invention discloses a template-free synthesis method of tannic acid-based porous polymers and derived carbon materials thereof under mild conditions. The template-free synthesis method of the tannic acid-based porous polymers and the derived carbon materials thereof under the mild conditions includes the steps of: (1) adding a compound containing a bisamino functional group, concentrated hydrochloric acid and deionized water to a round bottom flask, using an ice bath to control the temperature between 0-5 DEG C, and adding a sodium nitrite aqueous solution after stirring evenly and continuing stirring to completely convert amino groups into diazonium salt; (2) maintaining the ice bath state, adding a tannic acid and sodium carbonate aqueous solution after neutralizing with a sodium carbonate solution, conducting filtering separation of generated solid precipitate after 12 hours, washing with deionized water, methanol, tetrahydrofuran, methanol and water in sequence, and then conducting freeze drying to obtain the tannic acid-based porous polymers; (3) calcining the tannic acid-based porous polymers in a tube furnace at the temperature of 900 DEG C for 3 hours, and then coolingdown naturally to obtain target products. The template-free synthesis method of the tannic acid-based porous polymers and the derived carbon materials thereof under the mild conditions has the advantages of being simple, needing mild conditions and no template, and producing the final products that have excellent carbon dioxide capture capability.

Description

technical field [0001] The invention belongs to the field of porous material preparation, and in particular relates to a template-free method for synthesizing a tannic acid-based porous polymer precursor and porous carbon material under mild conditions and an application thereof. Background technique [0002] Porous carbon materials have been widely used in gas capture, electrochemical energy storage, catalyst immobilization and other fields due to their superior performance and low cost. It is necessary to properly select a suitable carbon material for a specific application, and its performance mainly depends on the pore size, pore connectivity, specific surface area, and material morphology. Traditionally commercialized activated carbon is obtained by incomplete combustion of petrochemical raw materials at high temperatures (usually above 1200 °C), which is generally considered to be harsh and energy-intensive. However, some schemes for preparing porous carbon materials ...

AI Technical Summary

Problems solved by technology

Traditionally, commercial activated carbon is obtained by incomplete combustion of petrochemical raw materials at high temperatures (usually above 1200 °C), which is generally considered to be harsh and energy-intensive.

However, some schemes for preparing porous carbon materials by the template method usually require complicated steps or harsh conditions to ensure that the template can be completely removed.

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