Preparation method of nanosheet nitrogen-containing porous carbon material

摘要

A preparation method of a nanosheet nitrogen-containing porous carbon material includes steps of: dissolving alkali and water-soluble amine-containing compound in water, forming an aqueous solution; adding cellulose or a derivative thereof into the aqueous solution; after mixing and drying, obtaining a crystal composite of the alkali and the water-soluble amine-containing compound, wrapped by the cellulose or the derivative thereof; carbonizing the crystal composite under nitrogen gas flow; washing a crabonized product; and obtaining the nanosheet nitrogen-containing porous carbon material. Through changing a proportion among the alkali, the water-soluble amine-containing compound and the cellulose or the derivative thereof, a specific surface area, pore structure, nitrogen content and thickness of the nanosheet nitrogen-containing porous carbon material are adjusted. The nanosheet nitrogen-containing porous carbon material has the thickness of 10-100 nm, the specific surface area of 800-2000 m2/g, pore volume of 0.50-1.50 cm3/g, and the nitrogen content of 1-8 wt %.

主权项

1. A preparation method of a nanosheet nitrogen-containing porous carbon material, wherein: a cellulose or a derivative thereof is adopted as a raw material; a sheet-structured template is formed through a self-assembly of a crystal composite of an alkali and a water-soluble amine-containing compound; and after carbonization, the nanosheet nitrogen-containing porous carbon material is obtained; comprising steps of:
(1) dissolving the alkali and the water-soluble amine-containing compound in water, forming an aqueous solution; adding the cellulose or the derivative thereof into the aqueous solution; uniformly mixing and drying the aqueous solution; and obtaining the crystal composite of the alkali and the water-soluble amine-containing compound, which is wrapped by the cellulose or the derivative thereof; (2) under nitrogen gas flow, carbonizing the crystal composite of the alkali and the water-soluble amine-containing compound, which is wrapped by the cellulose or the derivative thereof, at 600-900° C. for 60-180 min, so as to obtain a carbonized product; and (3) washing the carbonized product with water or dilute acid and obtaining the nanosheet nitrogen-containing porous carbon material.