Method for preparing tungsten disulfide/graphene heterostructure

Abstract

The invention discloses a method for preparing a tungsten disulfide / graphene heterostructureby a liquid-phase ultrasonic method. The method comprises the following steps: by using a tungsten disulfide nanosheet ethanol dispersion solution and a graphene ethanol dispersion solution as raw materials, respectively proportionally measuring certain volumes of the tungsten disulfide nanosheet dispersion solution and graphene dispersion solution, and carrying out ultrasonic treatment at normal temperature for 30 minutes by using a probe-type ultrasonic facility with the ultrasonic power of 100-200W; mixing the two obtained dispersion solutions, and carrying out ultrasonic treatment at 50 DEG C for 6 hours by using a tank-type ultrasonic facility with the ultrasonic power of 200-600W, thereby obtaining a mixed dispersion solution; carrying out vacuum filtration on the mixed dispersion solution through a microporous filter membrane, and collecting the filter cake; and carrying out vacuum drying on the collected filter cake at 80 DEG C for 2 hours to obtain the black tungsten disulfide / graphene heterostructure. The preparation method is simple and controllable; and the prepared tungsten disulfide / graphene heterostructure has potential application value in the fields of semiconductor electronic devices, lithium ion batteries, catalytic hydrogen production, electromagnetic wave absorption and the like.

Description

technical field [0001] The invention relates to a preparation method of a tungsten disulfide / graphene heterostructure. Background technique [0002] Graphene is the thinnest and strongest material known in nature. It is a two-dimensional planar crystal structure. Its lattice is composed of six carbon atoms forming a hexagon, and the carbon atoms are sp 2 hybridization. Graphene has a high light transmittance, only about 2.3% light absorption, and has a very high electron mobility (15000cm 2 / v s), extremely low resistivity, is a new generation of transparent conductive materials. Tungsten disulfide is an inorganic compound with a layered structure similar to graphite. It can be stripped into a single-atom-thick nanoscale film by physical and chemical means. It exhibits unique properties in optics and mechanics, and is an important functional material, which has potential application value in semiconductor electronic devices, lithium-ion batteries, and catalytic hydrogen p...

AI Technical Summary

Problems solved by technology

Chen et al. used a hydrothermal method to combine tungsten disulfide nanosheets and graphene oxide to prepare tungsten disulfide nanosheets / reduced graphene oxide composite materials, which improved its performance in lithium-ion batteries, but the process was complicated and difficult to control.

Tungsten disulfide nanosheets and graphene are both two-dimensional planar nanomaterials, but the conductivity of nano-tungsten disulfide is low. The patent of this invention provides a simple method for preparing tungsten disulfide nanosheets / graphene heterostructures, directly Using graphene and ultra-thin tungsten disulfide nanosheet dispersion liquid as raw materials, using liquid phase ultrasonic technology to superimpose graphene and tungsten disulfide nanosheets to form a two-dimensional heterogeneous structure, introducing a new charge conduction mechanism, which can further improve The application performance of tungsten disulfide nanosheets in semiconductor electronic devices, lithium-ion batteries, catalytic hydrogen production, electromagnetic wave absorption, etc., while simplifying the preparation process of ultra-thin tungsten disulfide nanosheets / graphene heterostructures