Preparation method of graphite alkene like tungsten disulfide nanometer sheet

A technology of tungsten disulfide and graphene, applied in chemical instruments and methods, nanotechnology, nanotechnology, etc., can solve problems such as weak van der Waals force, achieve low cost, high product output rate, and simple and easy-to-control production process Effect

Inactive Publication Date: 2014-03-19
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Graphene-like tungsten disulfide is a two-dimensional crystal material with a "sandwich sandwich" layered structure composed of a single or multiple layers of hexagonal tungsten disulfide: a single layer of tungsten disulfide consists of three atomic layers, and the middle one The upper and lower layers are sulfur atomic layers, and the tungsten atomic layer is sandwiched by two sulfur atomic layers to form a "sandwich" structure. Tungsten atoms and sulfur atoms are covalently bonded to form a two-dimensional atomic crystal; Layered tungsten disulfide is composed of several single-layer tungsten disulfide, generally no more than five layers, with weak van der Waals force between layers; this unique "sandwich" layered structure makes graphene-like tungsten disulfide nanosheets in lubricants , catalysis, energy storage, sensors, electroluminescence and many other fields have broad application prospects; in addition, unlike graphene with a two-dimensional layered structure, graphene-like tungsten disulfide also has a special energy band structure; although graphite Graphene has high conductivity in a two-dimensional plane, but because pure graphene materials have no band gap, it brings disadvantages to its application in electronic devices such as transistors; however, graphe...

Method used

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  • Preparation method of graphite alkene like tungsten disulfide nanometer sheet
  • Preparation method of graphite alkene like tungsten disulfide nanometer sheet
  • Preparation method of graphite alkene like tungsten disulfide nanometer sheet

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Put 0.5gWO 3 Mix with 4.92g of thiourea and grind it with a mortar for 45 minutes, put the ground powder into a porcelain boat for later use; increase the temperature of the tube furnace to 850℃, and pour nitrogen into the tube furnace; in the tube furnace When the temperature is stable at 850℃, open the flange at the outlet end of the tube furnace, and quickly push the porcelain boat into the central hot zone of the tube furnace for 1 hour; then, after the tube furnace is naturally cooled to room temperature, remove the tube furnace Flanges at both ends, take out the porcelain boat to obtain black powder, that is, graphene-like tungsten disulfide nanosheets.

Embodiment 2

[0019] Put 0.5gWO 3 Mix with 3.3g of thiourea and grind with a mortar for 30 minutes, put the ground powder into a porcelain boat for later use; increase the temperature of the tube furnace to 800°C, and let in nitrogen; the temperature in the tube furnace is stable at 800°C Open the flange at the outlet end of the tube furnace, and quickly push the porcelain boat into the central hot zone of the tube furnace for 30 minutes; then, after the tube furnace is naturally cooled to room temperature, black powder, ie, graphene-like disulfide, is obtained Tungsten nanosheets.

Embodiment 3

[0021] Put 0.5gWO 3 After mixing with 6.6g of thiourea, grind it with a mortar for 60 minutes, put the ground powder into a porcelain boat for later use; increase the temperature of the tube furnace to 900°C, and blow in nitrogen; the temperature in the tube furnace is stable at 900°C Open the flange at the outlet end of the tube furnace, and quickly push the porcelain boat into the central hot zone of the tube furnace for 60 minutes; then, after the tube furnace is naturally cooled to room temperature, black powder is obtained, that is, graphene-like disulfide Tungsten nanosheets.

[0022] figure 1 XRD pattern of the prepared product, the product is pure WS 2 Hexagonal crystal figure 2 For the SEM photo of the prepared product, it can be clearly seen that a large number of ultra-thin nanosheets are formed without agglomeration, and the thickness of the nanosheets is 3-5 nm; image 3 In the TEM photograph of the prepared product, many graphene-like nanosheets can be seen, and th...

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Abstract

The invention discloses a preparation method of graphite alkene like tungsten disulfide nanometer sheet, which employs a high temperature solid phase synthesis method, and the method comprises the following steps: mixing thiourea and WO3 according to mol ratio 20:1-41:1 and fully grinding, and containing the grinded powder into a porcelain boat; heating a tubular furnace to 800-900 DEG C and letting nitrogen in; quickly pushing the porcelain boat into a central heat zone position of the tubular furnace and processing for 30-60 min at constant temperature; then, the mixture is naturally cooled to room temperature, and the graphite alkene like tungsten disulfide nanometer sheet is obtained. The invention has the advantages of simple technology and low cost, and the obtained product has high purity and yield, and is hopeful to be used in large scale industrial production.

Description

Technical field [0001] The present invention relates to the inorganic material tungsten disulfide (WS 2 ), specifically the preparation method of graphene-like tungsten disulfide nanosheets. Background technique [0002] Graphene, as a two-dimensional nanomaterial with only a single layer of carbon atoms in thickness and a hexagonal honeycomb lattice, is a two-dimensional nanomaterial. Because of its unique electrical behavior and extremely high specific surface area, it has become the next fullerene and carbon nanotube. Later, a member of the elemental carbon family that has been widely concerned; graphene is a typical two-dimensional nanostructure system, its thickness is on the atomic scale, but the plane diameter can reach sub-millimeter and above, and its two-dimensional scale is highly anisotropic. The confinement effect and surface effect make this single-layer elemental carbon material exhibit completely different electrical behavior, mechanical properties, optical and th...

Claims

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Application Information

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IPC IPC(8): C01G41/00B82Y40/00B82Y30/00
Inventor 唐华张向华李磊李长生
Owner JIANGSU UNIV
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