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Method for preparing tungsten disulfide nano sheet

A technology of nano-flakes and tungsten disulfide, applied in chemical instruments and methods, nanotechnology, nanotechnology, etc., can solve problems such as high temperature, vacuum degree, and complicated operation process, and achieve easy operation, simple experimental methods, and environmental pollution small effect

Inactive Publication Date: 2014-05-07
XINJIANG UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] It can be seen from the above reports that the reaction requires higher temperature and vacuum, and the operation process is complicated.

Method used

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  • Method for preparing tungsten disulfide nano sheet
  • Method for preparing tungsten disulfide nano sheet
  • Method for preparing tungsten disulfide nano sheet

Examples

Experimental program
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Effect test

Embodiment 1

[0016] In a high-pressure reactor with a volume of 50mL, add a certain amount of Li 2 CO 3 Powder, direct commercially purchased WS 2 Powder and 40mL organic solvent benzyl alcohol solution, put the autoclave at 200 o The solvothermal reaction was maintained for 48 hours at C temperature; the reaction product was washed with deionized water, acetone, and absolute ethanol, and collected by vacuum drying, and the resulting product was added to deionized water and NN-dimethylformaldehyde at a volume ratio of 1:1. In the mixed solution of methyl formamide, continuous ultrasonic oscillation for 12 hours, the solution was centrifuged at a speed of 600 revolutions per minute (r / min) for 30 minutes (min), the supernatant was taken, and the obtained supernatant was centrifuged at a speed of 6000 r / min The precipitate was collected for 10 min; then, the precipitate was washed with 3% HCl, deionized water, and absolute ethanol, dried in vacuum and the final product was collected. Scan...

Embodiment 2

[0018] In a high-pressure reactor with a volume of 50mL, add a certain amount of Li 2 CO 3 Powder, direct commercially purchased WS 2 Powder and 40mL organic solvent benzyl alcohol solution, put the autoclave at 200 o C for 24 hours of solvothermal reaction; the reaction product was washed with deionized water, acetone, and absolute ethanol, dried and collected in vacuum, and the resulting product was added to deionized water and NN-dimethylformaldehyde at a volume ratio of 1:1. In the mixed solution of methyl formamide, continuous ultrasonic oscillation for 12 hours, the solution was centrifuged at a speed of 600 revolutions per minute (r / min) for 30 minutes (min), the supernatant was taken, and the obtained supernatant was centrifuged at a speed of 6000 r / min The precipitate was collected for 10 min; then, the precipitate was washed with 3% HCl, deionized water, and absolute ethanol, dried in vacuum and the final product was collected.

Embodiment 3

[0020] In a high-pressure reactor with a volume of 50mL, add a certain amount of Li 2 CO 3 Powder, direct commercially purchased WS 2 Powder and 40mL organic solvent benzyl alcohol solution, put the autoclave at 200 o C for 72 hours of solvothermal reaction; the reaction product was washed with deionized water, acetone, and absolute ethanol, dried and collected under vacuum, and the resulting product was added to deionized water and NN-dimethyl In the formamide mixed solution, continuously ultrasonically oscillate for 12 hours, centrifuge the solution at a speed of 600 revolutions per minute (r / min) for 30 minutes (min), take the supernatant, and then centrifuge the obtained supernatant at a speed of 6000 r / min for 10 minutes The precipitate was collected; then, the precipitate was washed with 3% HCl, deionized water, and absolute ethanol, dried in vacuum and the final product was collected.

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Abstract

The invention discloses a method for preparing a tungsten disulfide nano sheet. The method is achieved by the following technological processes: adding a certain amount of Li2CO3 powder, directly commercially purchased WS2 powder and 40mL of organic solvent phenylcarbinol solution to a high-pressure reaction kettle of which the volume is 50mL; keeping the high-pressure reaction kettle at 200 DEG C for 24-72 hours; carrying out solvothermal reaction; drying in vacuum and collecting a reaction product; adding to a mixed solution of deionized water and NN-dimethylformamide with volume ratio is 1:1; continuously and ultrasonically vibrating for 12-24 hours; and drying in vacuum and collecting the final product to obtain finally layered tungsten disulfide nano sheet. The product has the characteristics of being good in crystallinity, good in dispersibility, small in environmental pollution, simple in experiment method, and easy to operate and popularize.

Description

technical field [0001] The invention belongs to the technical field of semiconductor nanomaterials and their preparation, and is a 2 A method for directly layering and preparing tungsten disulfide nanoflakes. Background technique [0002] Tungsten disulfide, as a transition metal disulfide, is a semiconductor material with a layered structure, showing good semiconductor, metal and even superconducting properties. Monolayer tungsten disulfide is a two-dimensional direct band gap semiconductor material, which is very different from the indirect band structure of its corresponding bulk material, and can perform well due to its electronic properties and high specific surface area. Its electrical, optical and mechanical properties are widely used in sensing, catalysis, energy storage and many other aspects. [0003] Scientific research in recent years has shown that nanomaterials can display some excellent physical and chemical properties, and have important application value i...

Claims

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Application Information

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IPC IPC(8): C01G41/00B82Y30/00B82Y40/00
Inventor 简基康黄凤吴荣
Owner XINJIANG UNIVERSITY
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