Preparation method of material similar to graphene

Abstract

The invention discloses a method for preparing a material similar to graphene by selectively etching Ti3AlC2. The method comprises the following steps: sieving Ti3AlC2 with a 100-200-mesh sieve, putting Ti3AlC2 into a hydrofluoric acid liquid under magnetic stirring or ultrasonic dispersion to react for 20 hours, repeatedly cleaning a reaction product with ethanol and distilled water, then carrying out ultrasonic dispersion for 1-6 hours, and then carrying out centrifugation or suction filtration and drying the collected product at 50 DEG C for 1-2 hours. The method is low in cost, simple in process and convenient to operate and is suitable to be popularized in industrial production.

Description

technical field [0001] The present invention relates to the field of nano functional materials, specifically, to Ti 3 AlC 2 A method for preparing graphene-like materials by selective etching. Background technique [0002] Graphene is a new type of two-dimensional planar nanomaterial discovered in 2004. Its special monoatomic layer structure determines its rich and novel physical properties. Graphene has become a hot topic since its discovery. International frontiers and hotspots. [0003] Although graphene has won more attention than other two-dimensional materials, the simple chemical bonds and weak van der Waals bonds between layers limit its application; in general, multi-element layered materials have more advantages than single-element materials. More potential properties, because multi-element materials have more synthesis variables and can achieve more special properties. [0004] The MAX phase is hexagonal in layered arrangement (space group P6 3 / mmc), with tw...

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Problems solved by technology

There are about 60 kinds of MAX phases discovered so far; Ti 3 AlC 2 It is the most widely studied and promising category of MAX phases. Ti 3 AlC 2 It is a new type of layered ternary compound, which has many advantages of metal and ceramics, such as excellent electrical conductivity, thermal conductivity, processability, good damage resistance, high melting point, high modulus, high strength and low Advantages such as density; M n+1 x n The chemical properties of the A layer are relatively stable, the bonding bonds of the A layer are relatively weak, and the reactivity is relatively strong; the mechanical deformation of the MAX phase is affected by the dislocation of the substrate, and has anisotropy, and the deformation will cause partial delamination, which will form Flakes of about tens or hundreds of nanometers, that is, easily from Ti 3 AlC 2 Extracting the Al layer from the medium forms a new type of two-dimensional material, which has potential application values ​​similar to graphene and also retains some excellent properties of the MAX phase; currently there is no research on Ti in China. 3 AlC 2 According to relevant reports on selective corrosion into graphene-like structures, the foreign Naguib team reacted with a hydrothermal method to obtain a two-dimensional structure, but standing still makes the particles easy to agglomerate, and the corrosion effect of the particles deposited below is not complete. It is more suitable to be extended to industrial production, and the concentration of acid used is lower. In order to solve the shortcomings of uneven corrosion, stirring or ultrasonic methods are used during the reaction to make the reaction more uniform and thorough.

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