Preparation method of a novel three-dimensional nitrogen-doped graphene composite material system

Abstract

The invention discloses a preparation method of a novel three-dimensional nitrogen doped graphene composite material system. The method comprises the following steps: 1, uniformly dispersing graphene oxide in a solvent at room temperature, adding a selected material and a nitrogen-containing compound, and uniformly mixing to form a mixed solution; 2, reacting the mixed solution at a temperature from room temperature to 150DEG C for 0-8h; and 3, cooling the above obtained product to room temperature, centrifuging, collecting the obtained product, washing, and drying to obtain the nitrogen doped graphene composite material. The three-dimensional nitrogen doped graphene composite material system with the nitrogen content of 8-19% can be efficiently and controllably prepared through the method, and the nitrogen content of the system can be controlled by changing the kind and the amount of the added nitrogen-containing compound, the reaction temperature and the reaction time; and the method is simple, is easy to enforce, allows the yield to be greater than 98.9%, and can be widely used in fields of water treatment, biomedicines, energy generation, conversion and storage devices, electrostatic prevention, heat management, heat conduction and dissipation, sensors, electromagnetic shielding, wave absorption and catalysis.

Description

technical field [0001] The invention relates to a preparation process of a graphene-based composite material system, in particular to a preparation method of a novel three-dimensional nitrogen-doped graphene composite material system, and belongs to the field of material science. Background technique [0002] At present, a lot of research has been done on the doping of graphene. Dopants include boron, nitrogen, gases, metals and organic molecules, etc., and the chemical activity and electrical properties of the doped graphene have been greatly improved. Among the many dopants, nitrogen-doped graphene has received the most attention. Compared with undoped graphene, nitrogen-doped graphene has more active areas, which is more conducive to the lithium intercalation / intercalation of its surface. delithiation occurs. In the field of lithium-ion batteries, reduced graphene oxide is the most common substrate used as a composite material, but its weak conductivity limits its appli...

AI Technical Summary

Problems solved by technology

In the field of lithium-ion batteries, reduced graphene oxide is the most common substrate used as a composite material, but its weak conductivity limits its application as a conductive network, and the nitrogen atoms in nitrogen-doped graphene can provide more Electron cloud density to increase conductivity

[0003] At present, the methods for synthesizing nitrogen-doped materials are generally arc discharge or chemical vapor deposition. The preparation process of these methods is complex, high cost, and polluting, and it is difficult to prepare in large quantities.

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