Nitrogen-doped graphene-metal nanoparticle film and preparation method thereof

Abstract

The invention discloses a nitrogen-doped graphene-metal nanoparticle film and a preparation method thereof, and the preparation method comprises the following steps: (1) uniformly mixing a graphene oxide solution, metal nanoparticles and a water-soluble amine cross-linking agent to obtain a mixture; wherein the mass ratio of the graphene oxide to the metal nanoparticles is (1: 0.01)-(1: 5); (2) coating the mixture obtained in the step (1) to form a film, and drying at 20-95 DEG C to obtain an amino cross-linked graphene oxide-metal nanoparticle film; and (3) carrying out heat treatment on the amino cross-linked graphene oxide-metal nanoparticle film obtained in the step (2) under the protection of inert gas to obtain the nitrogen-doped graphene-metal nanoparticle film. In the graphene oxide solution, the metal nanoparticles and the water-soluble amine cross-linking agent, a graphene oxide solution coating method is adopted, solidification and self-assembly of the amino cross-linked graphene oxide-metal nanoparticle film can be achieved at the same time in one step, and the method is low in reaction temperature, easy to operate, environmentally friendly, capable of achieving large-scale preparation, simple, controllable and suitable for industrial production. The single condition is easy to operate.

Description

technical field [0001] The invention relates to the field of graphene films, in particular to a nitrogen-doped graphene-metal nanoparticle film and a preparation method thereof. Background technique [0002] As the most basic structural unit of all carbon materials, graphene has a true single atomic layer thickness and strict two-dimensional structure, and has high mechanical strength, elasticity, thermal conductivity, electrical conductivity, and quantum Hall effect. Since British scientists (Andre Geim) Andre Geim and (Konstantin Novoselov) Kostyanovosenov won the Nobel Prize for discovering graphene in 2010, the research on graphene has reached an unprecedented climax, and more and more researches It is found that it has great application prospects in special fields such as energy storage, electrical devices, catalysis and biomedicine. [0003] The macroscopically assembled graphene film is a main form of macroscopic nanoscale graphene sheets. The commonly used methods i...

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Problems solved by technology

[0003]Macroscopically assembled graphene film is a main form of macroscopic nano-scale graphene sheets. Commonly used methods include suction filtration, scraping film, and spin coating and spraying methods, etc., but these methods limit the large-scale and continuous preparation of graphene films

The patent literature with the publication number CN104229784A discloses two methods for preparing graphene membranes: one, by wet spinning, depositing a membrane in a coagulation solution such as an inorganic metal salt solution, drying it, and then reducing it with a reducing agent The two-step method prepares ion-enhanced graphene membranes. Although this method provides a method for continuously preparing graphene membranes by wet spinning, the preparation process is cumbersome, and two-step methods are required to achieve graphene membranes. The defect that the precipitant remains in the film and cannot be removed by heat treatment; second, the graphene solution is used as a raw material, and the film is solidified in a coagulation solution containing coordination ions, and dried to obtain an ion-enhanced graphene film. , although the preparation method is simple, due to the characteristics of graphene itself without special functional groups, it is difficult to disperse in organic solvents or water and coordinate solidification with coordination ions, and the concentration of the solution is also difficult to meet the requirements of solidification and forming. Concentration, so it is basically impossible to solidify and form graphene solution as a raw material in the coagulation solution of coordination ions

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