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Molybdenum disulfide nano-sheet material preparation method

A molybdenum disulfide and nanosheet technology is applied in the field of preparation of molybdenum disulfide nanosheet materials, which can solve the problems that lithium ions are difficult to completely clean, controllable mass production is difficult to achieve, and product quality is not uniform, and it is easy to intelligentize Control, improve the effect of intercalation, promote the effect of intercalation and peeling

Active Publication Date: 2020-02-21
XIAMEN HONGLU TUNGSTEN MOLYBDENUM IND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] CN104310482A proposes a method for preparing molybdenum disulfide nanosheets by ultrasonic-assisted chemical intercalation. The method uses n-butyllithium as an intercalation agent. The preparation environment requires anaerobic and anhydrous, and lithium ions are difficult to completely clean, and are likely to remain in the product become impurity in the medium, resulting in impurity of the product and affecting the application
This method will introduce uncontrollable metal ions into the product, which cannot be completely removed, which will lead to impurity of the product and affect the application
CN106563130A adds self-protein and molybdenum disulfide powder into water, and separates and obtains molybdenum disulfide nanosheets by means of ultrasonic crushing, but the quality of the product obtained by this method is not uniform, the yield is small, and it is difficult to achieve controllable mass production

Method used

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  • Molybdenum disulfide nano-sheet material preparation method
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Examples

Experimental program
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Effect test

Embodiment 1

[0042]Use tetrabutylammonium bisulfate as the electrolyte and deionized water as the solvent to prepare a 5 mg / mL electrolyte solution. Take 10g of molybdenum disulfide powder (800 mesh), add 0.25g of polyvinylpyrrolidone, and then add 5mL of electrolyte solution, stir evenly, and use it as molybdenum disulfide parent material. Titanium plates were used as cathode and anode electrode materials, and the electrode spacing was set to 5 cm. A 36V DC regulated power supply is used, and the positive and negative poles are applied to the anode and cathode respectively. The anode and the cathode are vertically inserted into the electrolyte solution and the molybdenum disulfide parent material, respectively. The anode chamber and the cathode chamber are separated by a homogeneous cation exchange membrane. The liquid level of the electrolyte solution in the anode chamber is slightly higher than the upper surface of the molybdenum disulfide parent material. When the anode is inserted ...

Embodiment 2

[0044] Use tetrabutylammonium bromide as electrolyte and deionized water as solvent to prepare 7.5 mg / kg electrolyte solution. Take 10g of molybdenum disulfide powder (800 mesh), add 0.25g of xanthan gum, and then add 5mL of electrolyte solution, stir evenly, and use it as molybdenum disulfide parent material. Tungsten plates with an anti-oxidation coating are used as the cathode and anode electrode materials, and the electrode spacing is set to 5 cm. A 24V DC regulated power supply is used, and the positive and negative poles are applied to the anode and cathode respectively. The anode and the cathode are vertically inserted into the electrolyte solution and the molybdenum disulfide parent material, respectively. The anode chamber and the cathode chamber are separated by a homogeneous cation exchange membrane. The liquid level of the electrolyte solution in the anode chamber is slightly higher than the upper surface of the molybdenum disulfide parent material. When the ano...

Embodiment 3

[0046] Use dodecyltrimethylammonium bromide as the electrolyte and deionized water as the solvent to prepare a 2 mg / m electrolyte solution. Take 10g of molybdenum disulfide powder (800 mesh), add 0.25g of polyvinylpyrrolidone, and then add 5mL of electrolyte solution, stir evenly, and use it as molybdenum disulfide parent material. A nickel plate with an anti-oxidation coating was used as the cathode and anode electrode materials, and the electrode spacing was set to 5 cm. A 24V DC regulated power supply is used, and the positive and negative poles are applied to the anode and cathode respectively. The anode and the cathode are vertically inserted into the electrolyte solution and the molybdenum disulfide parent material, respectively. The anode chamber and the cathode chamber are separated by a homogeneous cation exchange membrane. The liquid level of the electrolyte solution in the anode chamber is slightly higher than the upper surface of the molybdenum disulfide parent m...

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Abstract

The invention discloses a molybdenum disulfide nano-sheet material preparation method. According to the method, an electrochemical method is used, an inert transition metal is used as an electrode, anexternal circuit device regularly controls the directional reaction time of a cathode and an anode and the electrode conversion time interval, an electrolyte is used as a medium to prepare molybdenumdisulfide into a reaction slurry; and the molybdenum disulfide nano-sheet material is obtained through control of electrolyte cation repeated intercalation-de-intercalation reaction, centrifugation,drying and other post-treatment steps. According to the invention, most of the molybdenum disulfide nano-sheet materials prepared by the method are single-layer molybdenum disulfide two-dimensional materials, belong to direct band-gap nanometer materials, can be used as fluorescent materials, and can further be popularized and applied to the fields of luminescent devices, photoelectric conversion,energy storage, catalysis and the like; and the method is a nanometer material preparation method with characteristics of environmental protection, energy saving and easy intelligent control.

Description

technical field [0001] The invention belongs to the technical field of molybdenum disulfide preparation, and in particular relates to a preparation method of molybdenum disulfide nano sheet material. Background technique [0002] Molybdenum disulfide is one of the transition metal dichalcogenides (TMDs). Metal molybdenum atoms and sulfur atoms are connected by covalent bonds to form a "sandwich"-like interlayer, and the layers are connected by van der Waals force. This structure allows the layers to slide easily like graphite. Molybdenum disulfide is a semiconductor with a certain energy level gap, and the energy level gap increases as the number of layers decreases. Very few layers or single layer molybdenum disulfide changes from an indirect band gap to a direct band gap semiconductor, which is a two-dimensional material with good physical and chemical properties. In recent years, single-layer and few-layer molybdenum disulfide nanosheet materials have attracted extensi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G39/06B82Y40/00
CPCC01G39/06B82Y40/00C01P2004/04C01P2002/84C01P2002/70
Inventor 陈宜波郑艾龙黄丽枚黄志民
Owner XIAMEN HONGLU TUNGSTEN MOLYBDENUM IND CO LTD
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