A kind of preparation method of graphene oxide nanometer material

Abstract

The invention discloses a preparation method of a graphene oxide nanomaterial, comprising: S1, performing ultrasonic treatment on GO powder in deionized water for a first preset time to obtain a GO aqueous solution; S2, taking a first preset volume of GO Put the aqueous solution into a round bottom flask, slowly add butanol of the second preset volume in the round bottom flask, and let it stand for 10 minutes; S3, slowly feed nitrogen or carbon dioxide from the bottom of the round bottom flask through a quartz tube, and carry out the second A constant temperature water bath for a preset time, let stand for 2 hours; S4, suck out the third preset volume of the lower layer liquid from the bottom of the round bottom flask through a glass straw; S5, continue shaking the round bottom flask for 5 minutes, and transfer the liquid in the round bottom flask into the beaker. The preparation method provided by the invention can realize the surface modification of the titanium dioxide material on the surface of the GO two-dimensional nanomaterial. During the modification process, GO is not prone to coagulation and precipitation, and will not form multi-layer GO, which inhibits the formation of a large number of titanium dioxide monomer particles.

Description

technical field [0001] The invention relates to the technical field of nanomaterials, in particular to a preparation method of graphene oxide nanomaterials. Background technique [0002] Excellent mechanical properties are the basis and premise for a material to carry out engineering applications. The brittleness of ceramic materials seriously restricts its application: because ceramic materials have polycrystalline structure characteristics of ionic bonds or covalent bonds, they lack a slip system that can promote material deformation, which makes ceramic materials prone to cracks after being loaded, reducing the service life of materials and stability. [0003] Graphene oxide-graphene oxide (GO), as a two-dimensional carbon nanomaterial, has a high specific surface area, excellent mechanical and tribological properties, and is one of the materials with very high strength and toughness. The large contact area with the ceramic substrate is conducive to the transfer of stre...

AI Technical Summary

Problems solved by technology

However, the above method would introduce high-valent cations Ti 4+ , while GO is negatively charged by adsorbing OH- in water, and Ti 4+ GO rapidly coagulates and settles in water to form macroscopic flocculent agglomerates, which makes it impossible to obtain ideal nano-scale flake GO materials, and is not easy to be used for toughening Al 2 o 3 ceramics

[0008] (2) GO is not well dispersed in other solvents

This material is used as a toughening phase in ceramics. When the force is applied, the multi-layer GO is prone to separation and series movement, resulting in cracks and reducing the fracture toughness of ceramics.

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