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Preparation method of tungsten disulfide nano sheet

A technology of tungsten disulfide and nanosheets, which is applied in the field of preparing tungsten disulfide nanosheets to achieve the effects of improved stability and safety, optimized process parameters, and simple equipment

Active Publication Date: 2018-07-17
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] However, in the existing technology, under the premise of ensuring the structural integrity and yield of tungsten disulfide nanosheets, it is still a difficult point in this field to develop a preparation method with low cost, simple equipment, convenient operation, safety and stability.

Method used

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  • Preparation method of tungsten disulfide nano sheet

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preparation example Construction

[0040] A method for preparing stable tungsten disulfide nanosheets, comprising the steps of:

[0041] (1) After mixing and stirring tungsten disulfide and strong acid, after fully infiltrating, add ferrate or metal peroxide to react;

[0042] (2) The product after the reaction of step (1) is slowly added dropwise to deionized water for dilution;

[0043] (3) ultrasonically treating the diluted liquid in step (2) in an ultrasonic dispersion device;

[0044] (4) The liquid after the ultrasonic treatment in step (3) is left to stand, and the tungsten disulfide that has not been stripped or has a low stripping degree in the sediment is removed;

[0045] (5) Suction filtration is performed on the upper layer liquid after step (4) treatment, and the obtained substance is washed with hydrochloric acid first, and then washed to neutrality with deionized water;

[0046] (6) Drying the product obtained in step (5) to obtain tungsten disulfide nanosheets.

[0047] The possible princip...

Embodiment 1

[0063] (1) Weigh 1g of tungsten disulfide powder, stir and mix with 60ml of 98.3% concentrated sulfuric acid in a water bath at 20°C for 4 hours, then slowly add 3g of potassium ferrate, and continue to stir for 10 hours to fully react;

[0064] (2) The reactant is slowly added dropwise to deionized water for dilution;

[0065] (3) ultrasonically treat the diluted liquid at 300W for 8h;

[0066] (4) Leave the liquid after ultrasonic treatment for 12 hours to remove tungsten disulfide that has not been stripped or has a low stripping degree in the sediment;

[0067] (5) The treated upper layer liquid is subjected to suction filtration, and the obtained substance is first washed with hydrochloric acid for 2-3 times, and then washed with deionized water to neutrality;

[0068] (6) drying the obtained product at 60° C. for 10 h to obtain tungsten disulfide nanosheets.

[0069] The scanning electron micrograph of the tungsten disulfide nanosheet prepared in the present embodiment...

Embodiment 2

[0071] (1) Weigh 1g of tungsten disulfide powder, stir and mix with 80ml of 68% concentrated nitric acid in a water bath at 20°C for 4 hours, then slowly add 6g of potassium ferrate, and continue to stir for 10 hours to fully react;

[0072] (2) The reactant is slowly added dropwise to deionized water for dilution;

[0073] (3) ultrasonically treat the diluted liquid at 300W for 8h;

[0074] (4) Leave the liquid after ultrasonic treatment for 12 hours to remove tungsten disulfide that has not been stripped or has a low stripping degree in the sediment;

[0075] (5) The treated upper layer liquid is subjected to suction filtration, and the obtained substance is first washed with hydrochloric acid for 2-3 times, and then washed with deionized water to neutrality;

[0076] (6) drying the obtained product at 60° C. for 10 h to obtain tungsten disulfide nanosheets.

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Abstract

The invention provides a preparation method of a tungsten disulfide nano sheet. The preparation method comprises the following steps: (1) mixing tungsten disulfide with a strong acid, carrying out full infiltration, and adding a ferrate or a metal peroxide for carrying out a reaction; (2) slowly and dropwise adding the reactant obtained after the reaction into deionized water for dilution; (3) carrying out ultrasonic treatment on the diluted liquid in an ultrasonic dispersion device; (4) carrying out standing on the dispersed liquid, and removing tungsten disulfide which is not stripped or hasa low stripping degree in the obtained precipitate; (5) carrying out suction filtration treatment on the supernatant liquid obtained after standing, washing the obtained material with hydrochloric acid, and then carrying out washing to neutrality by using deionized water; and (6) finally drying the obtained product to obtain the tungsten disulfide nano sheet. According to the method provided by the invention, the tungsten disulfide nano sheet is prepared by stripping through the reaction of the strong acid with the ferrate or the metal peroxide and through the ultrasonic action; the method issafe and stable, is free of pollution, and has easily available raw materials; the operation is easy; the equipment is simple; the yield is high; and the product quality is good.

Description

technical field [0001] The invention belongs to the technical field of preparation methods of inorganic non-metallic materials, and specifically relates to a method for preparing tungsten disulfide nanosheets that is safe, stable, pollution-free, simple to operate, high in yield and good in product quality. Background technique [0002] In 2004, Andre Geim and Konstantin Novoselov, physicists at the University of Manchester, successfully separated graphene from graphite by micromechanical exfoliation. A wave of research on the synthesis and properties of 2D layered structure materials has started. Tungsten disulfide (WS 2 ) is a 2D layered material that has attracted much attention from researchers. Tungsten disulfide is a compound of tungsten and sulfur. It has a hexagonal layered structure similar to graphite. The layers are connected by weak van der Waals force. The powder is dark gray, slightly soluble in cold water, soluble in hot water, at room temperature It does n...

Claims

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Application Information

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IPC IPC(8): C01G41/00B82Y30/00B01J27/047C10M125/22
CPCC10M125/22B82Y30/00C01G41/00B01J27/047C10M2201/065C01P2004/03B01J35/23
Inventor 毕见强高希成王伟礼孙晓宁陈亚飞孙国勋冷明哲郝旭霞王璐颜伟康
Owner SHANDONG UNIV
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