Heteroatom doped starch carbon and preparation method thereof

Abstract

The invention discloses heteroatom-doped starch carbon and a preparation method thereof. The preparation method comprises the following steps: 1, drying modified starch containing heteroatoms, addinginto an organic acid solution to be evenly mixed, standing, and then drying so that a heteroatom-doped starch carbon precursor is obtained, wherein the modified starch is one or more of cationic starch, anionic starch and amphoteric starch, and (2) heating the heteroatom-doped starch carbon precursor to 400-1000 DEG C at a rate of 1-10 DEG C / min under the protection of an inert atmosphere, and roasting at a constant temperature for 0.5-5 h to obtain the heteroatom-doped starch carbon. The preparation method is simple and easy to operate, the production cost is greatly reduced, and the problemsthat an existing heteroatom doped carbon material is low in yield and small in doping amount are solved.

Description

technical field

[0001] The invention relates to the technical field of porous carbon materials, in particular to a heteroatom-doped starch carbon and a preparation method thereof. Background technique

[0002] As a material with high specific surface area and developed pores, porous carbon material has the advantages of acid and alkali corrosion resistance and low price, and is widely used in adsorption, decolorization, refining, separation, catalysis and other fields. At present, activated carbon is the most widely used porous carbon material. However, the pore structure of activated carbon materials is relatively complex and most of them are micropores with a diameter of less than 2 nanometers. In addition, the impurity content of activated carbon is relatively high. These problems limit the application of activated carbon in high-end fields, such as catalysis and analysis.

[0003] After introducing heteroatoms into the porous carbon skeleton, since the electronegativity...

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