CAS 1317-33-5 Molybdenum Disulfide Supplier Coating Grease MoS2 Price 99% Pure Molybdenum Disulfide Additive

Contact us for more information!

Molybdenum disulfide overview

Molybdenum disulfide is an inorganic substance with the chemical formula MoS2, which is the main component of molybdenite. Black solid powder with metallic luster. The melting point is 2375°C, the density is 4.80g/cm³ (14°C), and the Mohs hardness is 1.0~1.5.

Properties of molybdenum disulfide

Molybdenum disulfide is the main component of molybdenite. Black solid powder with metallic luster. The chemical formula is MoS2, the melting point is 2375°C, the density is 4.80g/cm3 (14°C), and the Mohs hardness is 1.0-1.5. It begins to decompose at 1370°C, and decomposes into metal molybdenum and sulfur at 1600°C. It begins to be oxidized when heated to 315°C in the air, and the oxidation reaction is accelerated as the temperature rises. Molybdenum disulfide is insoluble in water, dilute acid and concentrated sulfuric acid, generally insoluble in other acids, alkalis and organic solvents, but soluble in aqua regia and boiled concentrated sulfuric acid. Slow oxidation occurs at 400°C to form molybdenum trioxide.

Molybdenum disulfide has a high content of active sulfur, which is easy to corrode copper. This is discussed in many books and papers on lubricant additives. In addition, when parts made of copper and its alloys need to be lubricated, it is not impossible to use molybdenum disulfide lubricating products, and copper corrosion inhibitors need to be added.

How to Prepare Molybdenum Disulfide

natural law

Molybdenum disulfide has excellent properties and broad application prospects, so a lot of research has been done on the preparation and application of nano-molybdenum disulfide at home and abroad.

MoS2 can be prepared by natural methods, that is, the purification method of molybdenum concentrate. The method is to remove acid insoluble matter, SiO2, Fe, Cu, SiO2, Fe, Cu, SiO2, Fe, Cu, Ca, Pb and other impurities and further refine to obtain nano-MoS2. Climax Molybdenum Company of the United States adopts this method to produce MoS2. The nano molybdenum disulfide prepared by the method can maintain the crystal form of the natural molybdenum disulfide, has good lubricating performance, and is suitable for making lubricants. However, the purity of nano-molybdenum disulfide produced by natural methods is not high, and the purification technology needs to be further improved. When the temperature is below 400°C, when working in normal atmosphere, it is recommended to use lower cost MoS2. It has lubricating ability below 1300°C, and it is recommended to use lower-cost MoS2.

chemical synthesis

The synthetic method can produce sulfides with high purity, less impurities, and fine particle size, and can prepare sulfides that meet different functional requirements. There are many methods for preparing nanomolybdenum disulfide, such as ammonium tetrathiomolybdate thermal decomposition method, hydrogen sulfide or sulfur vapor reduction method, high-energy ball milling method, carbon nanotube space confinement method, hydrothermal synthesis method, high-energy physical method and chemical method and other combinations. There are a lot more. Generally speaking, there are two preparation methods, one is to directly react the tungsten source or molybdenum source with the sulfur source to obtain nano-MoS2, or first react the tungsten source or molybdenum source with the sulfur source to obtain the precursor, and then pass the precursor through appropriate method to decompose or reduce to MoS2.

Application of molybdenum disulfide

Molybdenum disulfide (MoS2) is a two-dimensional layered material composed of two chemical elements, molybdenum and sulfur. It has excellent optical, electrical, magnetic, mechanical and thermal properties, so it is widely used in energy storage, catalysis, semiconductor, lubrication and other fields. Its main uses are as follows:

1. As an additive to solid lubricants: MoS2 powder is known as the "king of advanced solid lubricants", with a friction coefficient between 0.05 and 0.09. It has the advantages of good dispersion, non-sticking, and oxidation resistance. It can be added to various Among the greases, it forms a non-stick colloidal state, which can increase the lubricity and extreme pressure properties of the grease, making it more suitable for high temperature, high pressure, high speed, and high load occasions.

2. As a modifier for lithium-ion battery electrode materials: MoS2 is a low-dimensional transition metal layered material with a large interlayer distance, which endows it with higher lithium ion retention capacity and wider width. The unique ion transport channel, combined with graphene, can effectively make up for the low storage capacity of existing pure graphite anode materials.

3. As a catalyst: MoS2 has high catalytic activity, good chemical stability, preferentially exposed active sites and long-range/short-range ordered atomic arrangement, and is expected to replace the noble metal platinum for electrochemical hydrogen evolution.

4. Manufacturing of transistors: Ultra-thin molybdenum disulfide transistors with a length of less than 100 nanometers provide greater possibilities for the large-scale popularization of high-performance flexible electronic products such as medical monitors, fitness trackers, smart clothing, and foldable smartphones .

5. Used in bionic eyes: Indium-doped molybdenum disulfide has ultra-low power consumption optical synapse characteristics, which can effectively reduce the power consumption of bionic eyes and solve the problem of difficult surface processing and integration.

6. Arthralgia treatment: MoS2 coating is the key material of "targeted nanoprobe" in nanotechnology for targeted analgesic diagnosis and treatment of osteoarthritis.

7. For the in situ gelation system: A novel photoinitiator-free in situ gelation system designed by Texas A&M University exploits the photothermal properties of MoS2 and the inherent phase transition ability of thermoresponsive polymers, exposed to near-infrared Radiation-activated dynamic polymer-nanomaterial interactions.

Technical ParametersofMolybdenum disulfide