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A kind of preparation method of tungsten disulfide nanosheet

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 easy availability of raw materials

Active Publication Date: 2019-08-23
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.

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  • A kind of preparation method of tungsten disulfide nanosheet

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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 method for preparing tungsten disulfide nanosheets. The steps include: (1) mixing and stirring tungsten disulfide and strong acid, fully infiltrating them, and then adding ferrate or metal peroxide to react; (2) reacting The reactants obtained are slowly added dropwise to deionized water for dilution; (3) the diluted liquid is ultrasonically treated in an ultrasonic dispersing device; (4) the dispersed liquid is allowed to stand to remove the precipitate that has not been peeled off or Tungsten disulfide with low peeling degree; (5) The upper liquid after standing is subjected to suction filtration, and the obtained material is first washed with hydrochloric acid, and then washed with deionized water until neutral; (6) Finally, the obtained product is dried Process to obtain tungsten disulfide nanosheets. The method of the present invention prepares tungsten disulfide nanosheets through the reaction of strong acid and ferrate or metal peroxide and ultrasonic peeling, which is safe, stable, pollution-free, easy to obtain raw materials, easy to operate, simple equipment, high yield, and high product quality. 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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Patent Type & Authority Patents(China)
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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