Molybdenum Disulfide in Various Fields of Important Application Value

Structure and Properties of Molybdenum Disulfide:

The crystal structure of molybdenum disulfide

Molybdenum disulfide is a layered material whose crystal structure can be regarded as a unit layer composed of two layers of S atoms and one layer of Mo atoms. Inside the unit layer, Mo atoms and S atoms are bonded together by covalent bonds, forming a stable octahedral structure. This layered structure makes molybdenum disulfide exhibit excellent electrical and mechanical properties in the direction perpendicular to the layer.

Electronic state and band structure of molybdenum disulfide

The electronic state and band structure of molybdenum disulfide is closely related to its electrical and optical properties. Through experimental and theoretical calculation, it is found that the valence band top and conduction band bottom are located near the center of the Brillouin zone and have the properties of a direct band gap semiconductor. In addition, the band structure of molybdenum disulfide shows strong anisotropy; that is, there are significant differences in electrical and optical properties along different directions.

Chemical stability of molybdenum disulfide

Molybdenum disulfide has good chemical stability and can remain stable under high temperatures and strong acid conditions. At room temperature, molybdenum disulfide is not easily oxidized by oxygen in the air, showing excellent antioxidant properties. In addition, molybdenum disulfide is not easily corroded under solid acid conditions, so it can be widely used in chemical reactions in extreme environments.

Electrical properties of molybdenum disulfideMolybdenum disulfide has excellent electrical properties, and its conductivity can reach more than 104 S/m at room temperature. In addition, molybdenum disulfide also has a low dielectric constant and a high carrier mobility, making it a promising electronic material. These excellent electrical properties make molybdenum disulfide widely used in integrated circuits, transistors, and other fields.

Mechanical properties of molybdenum disulfide

Molybdenum disulfide has excellent mechanical properties; its Young's modulus is as high as 140 GPa, and its hardness is as high as 25 GPa. These superior mechanical properties make molybdenum disulfide have a wide range of applications in various high-load and high-strength environments. In addition, molybdenum disulfide also has high thermal and chemical stability, making it a promising structural and functional material.

Synthesis and Preparation of Molybdenum Disulfide:

Chemical method

The chemical method is a preparation method that converts raw materials into target products by chemical reaction. Commonly used chemical methods include hydrogen sulfide or sodium sulfide reduction, ammonium sulfide, and ammonium molybdate or molybdate reaction method.

Hydrogen sulfide or sodium sulfide reduction process

The hydrogen sulfide or sodium sulfide reduction process is a method of reacting hydrogen sulfide or sodium sulfide with molybdate or molybdenum oxide at high temperatures to obtain molybdenum disulfide. The molybdenum disulfide prepared by this method has higher purity and crystallinity but requires higher preparation temperature and strict reaction conditions. In addition, the technique has safety concerns because it involves using dangerous chemicals such as hydrogen.

Ammonium sulfide and ammonium molybdate or molybdate reaction method

The reaction method of ammonium sulfide and ammonium molybdate or molybdate is to precipitate the mixed solution of ammonium sulfide and ammonium molybdate or molybdate at room temperature and to obtain molybdenum disulfide by filtration, washing, and drying. The molybdenum disulfide prepared by this method has a smaller particle size and better dispersion but lower purity and crystallinity. In addition, this method requires a large amount of ammonia and other chemicals, causing particular environmental pollution.

Green synthesis method

With the continuous improvement of environmental awareness, the green synthesis method has attracted more and more attention. The green synthesis method has the advantages of environmental friendliness, low energy consumption, and high safety. In recent years, some new green synthesis methods have been gradually applied to prepare molybdenum disulfide.

Electrochemical synthesis

Electrochemical synthesis is a method of converting raw materials into target products through electrochemical reactions. In the electrochemical synthesis of molybdenum disulfide, the researchers optimize the synthesis conditions by adjusting the current density, electrolyte concentration, and other parameters to improve the purity and crystallinity of molybdenum disulfide.

Photochemical synthesis

Photochemical synthesis is a method of using light energy to stimulate raw materials for chemical reactions. In the photochemical synthesis of molybdenum disulfide, the researchers optimize the synthesis conditions by adjusting the wavelength of the light source, light time, and other parameters to improve the crystallinity and dispersion of molybdenum disulfide.

Application of molybdenum disulfide in energy field

Solar cell

Molybdenum disulfide can be used as a light absorber in solar cells to improve the photoelectric conversion efficiency of the battery. The mechanism of action is that when the light hits the solar cell, molybdenum disulfide can absorb the light energy and convert it into electricity, thus achieving photoelectric conversion. 

Lithium battery

Molybdenum disulfide plays an essential role in lithium batteries. On the one hand, molybdenum disulfide can be used as a positive electrode material, which can store and release a lot of energy. On the other hand, molybdenum disulfide can also be used as a solid electrolyte, which can conduct lithium ions and improve the ionic conductivity of the battery. In addition, molybdenum disulfide can be used as a binder in the mortar to enhance the adhesion between the electrode and the collector.

Application of molybdenum disulfide in the electronic field:

Semiconductor device

Molybdenum disulfide can be used as a channel material in semiconductor devices, which has the advantages of high mobility and low noise. 

By adjusting the band structure of molybdenum disulfide, the performance of semiconductor devices can be precisely regulated. In addition, 

molybdenum disulfide can be used as a gate material in semiconductor devices, with advantages such as a high switching ratio and low power consumption.

Field-effect transistor

Molybdenum disulfide can be used as channel and insulating layer material in FET. As an insulating material, molybdenum disulfide has high resistivity and

thermal stability. As a channel material, molybdenum disulfide has the advantages of increased mobility and low noise. In addition, molybdenum disulfide

can also be used as a source and drain material in field-effect transistors, which have the advantages of high conductivity and low contact resistance.

Logic circuit

Molybdenum disulfide can be used as a switching and transmission device in logic circuits. As a switching device, molybdenum disulfide has the

advantages of high switching ratio and low power consumption. As a transmission device, molybdenum disulfide has the benefits of a high transmission

rate and low noise. In addition, molybdenum disulfide can be used as a material for devices such as storage devices and counters in logic circuits.

Application of molybdenum disulfide in lubrication field:

Molybdenum disulfide can be used as an additive in lubricants, with excellent lubrication properties and wear resistance. Adding molybdenum disulfide

to the oil can improve the adhesion and lubrication properties of the grease. In addition, molybdenum disulfide can be used as a lubricating film material,

with high strength, good thermal stability, and other advantages.

Store Molybdenum Disulfide MoS2 in the following conditions:

Molybdenum Disulfide MoS2 Pulp will be affected by dampness, so it is important to store the powder in a dry and cool room. Molybdenum Disulfide should not be exposed to stress.

Packing & Shipping Molybdenum Disulfide MoS2:

The packaging depends on the amount of Molybdenum Disulfide MoS2 POWDER.

Molybdenum Disulfide MoS2 Poudre packing: 100g, 500g, 1kg or 25kg/barrel vacuum packaging, or your request.

Molybdenum Disulfide MoS2 Pulfide shipping: Could be shipped by sea, air, or by express as quickly as possible after payment receipt.

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