Method for preparing nitrogen doped porous carbon material by using biologic proteins

Abstract

The invention provides a method for preparing a nitrogen doped porous carbon material by using biologic proteins. The method mainly comprises the following steps: 1, mixing the biologic proteins with an acid or alkali or salt solution; 2, carbonizing the above obtained dried mixture under the protection of inert gas; and 3, carrying out distilled water addition, pumping filtration and washing until the pH value is 6.4-7, and drying to obtain solid powder which is the nitrogen doped porous carbon material. The widely and easily available biologic proteins are adopted as raw materials, and the raw materials comprise silk fibroin, albumen and soybean proteins, so the method has the advantages of simple operating technology, convenient control, cleanness, environmental protection, and easy industrial realization. The prepared nitrogen doped porous carbon material has the advantages of large specific surface area, low ash content and good conductivity. The nitrogen doped porous carbon material can be used in lithium ion batteries, lithium sulfur batteries, super capacitors and other electrode materials, and fields of carbon dioxide capture, hydrogen storage, catalyst carriers, active carbon adsorbents and biologic applications.

Description

technical field [0001] The invention provides a method for preparing a nitrogen-doped porous carbon material by using biological protein, and belongs to the field of porous carbon material preparation. Background technique [0002] Porous carbon is mainly made of high-carbon substances such as various fruit shells (coconut shells, apricot shells, walnut shells, etc.), bamboo sawdust, and coal, which are obtained through pyrolysis and have strong adsorption capacity, complex pore structure, Porous carbon materials with good chemical inertness and other advantages are widely used in 1. Gas phase adsorption, such as storage of methane, hydrogen and natural gas; 2. Electrode materials for energy storage devices, such as positive electrode materials for lithium-sulfur batteries , electrode materials for supercapacitors, anode materials for lithium-ion batteries, cathode materials for lithium-air batteries, etc.; 3. Applications as catalysts and catalyst supports, such as hydrolys...

AI Technical Summary

Problems solved by technology

More importantly, the content of nitrogen in biological protein is about 16%, which is a good nitrogen source. It is not only rich in resources, but also cheap and renewable. As a functional porous material, nitrogen-doped porous carbon materials have specific surface area, Pore ​​size distribution has an important impact on performance. At present, there are problems in the production of activated carbon in my country, such as lack of pore size distribution control means, low nitrogen content, and weak specific application.

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