The Production Method of molybdenum disulfide
1 Natural law
Molybdenum disulfide has excellent properties and broad application prospects, so much research has been done on the preparation and application of nano-MoS2 at home and abroad.
MoS2 can be prepared by the natural method, the purification method of molybdenite concentrate. This method removes the insoluble acid matter, SiO2, Fe, Cu, Ca, Pb, and other impurities, and is further refined to obtain nano-MoS2. The nano-MoS2 prepared by this method can maintain the natural MoS2 crystal form, has good lubricating performance, and is suitable for making lubricants. However, the purity of nano-MoS2 produced by natural methods is low, and the purification technology needs further improvement. When the temperature is lower than 400 °C, using lower-cost MoS2 when working in a familiar atmosphere is recommended. It has lubricating ability below 1300 °C, and it is recommended to use lower-cost MoS2.
Hydrothermal Synthesis of MoS₂ Nanosheets
2 chemical synthesis
The synthetic method can produce high purity, fewer impurities, and fine particle size and can prepare sulfides that meet different functional requirements. Therefore, paying nano-sulfides by synthetic methods has always attracted much attention. There are many methods for preparing nano-MoS2, 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 means, and chemical method combination, etc.
Generally speaking, there are two preparation methods, one can directly react the tungsten source or molybdenum source with the sulfur source to obtain nano-MoS2, or first, respond to the tungsten source or molybdenum source with the sulfur source to get the precursor, and then pass the precursor through an appropriate The method decomposes or reduces to MoS2.
Production Process Details — Hydrothermal Synthesis Method
Among the synthetic routes, the hydrothermal method is particularly noteworthy for producing MoS₂ nanosheets with controlled morphology and crystallinity. A typical process involves dissolving a molybdenum salt (such as sodium molybdate Na₂MoO₄·2H₂O) and a sulfur source (such as thiourea or thioacetamide) in deionized water. The resulting solution is transferred to a Teflon-lined stainless steel autoclave and heated to 180–220°C for 12–24 hours. During this process, the molybdenum source reacts with the sulfur source to form MoS₂ nuclei, which gradually grow into nanosheets or nanoflowers depending on the reaction conditions. The final product is collected by centrifugation, washed repeatedly with deionized water and ethanol to remove residual ions and organic impurities, and dried at 60–80°C. Key parameters affecting the product morphology include the molar ratio of molybdenum to sulfur, reaction temperature, holding time, and pH of the precursor solution. The hydrothermal method is particularly suited for producing MoS₂ with high surface area and abundant edge sites, making it ideal for catalytic and sensing applications.
Advantages of Molybdenum Disulfide
1. Thoroughly eliminate oil spills, clean and neat, and promote civilized production.
By replacing liquid lubricants with solid MoS₂ lubrication, equipment operators can eliminate the need for frequent oil application, reducing the risk of oil leakage and drips that can contaminate workpieces and pose safety hazards. This transition to dry lubrication contributes to cleaner, safer, and more organized production environments, which is particularly beneficial in cleanroom applications such as semiconductor manufacturing and precision assembly.
2. It can save a lot of lubricating greases.
MoS₂ is applied in thin films or as a dry powder, requiring significantly less lubricant mass than traditional grease formulations. A single application of MoS₂ coating can last for extended periods, dramatically reducing the frequency of lubricant replenishment and lowering overall lubricant consumption. In some cases, MoS₂-based lubrication can reduce grease consumption by up to 80% compared to conventional grease lubrication.
3. Improve the technical condition of operation, extend the maintenance cycle, reduce the labor intensity of maintenance workers, and save labor.
The long-lasting lubricating performance of MoS₂ reduces the need for frequent maintenance interventions, allowing equipment to operate continuously for longer periods without lubrication-related stoppages. This reliability reduces the workload on maintenance personnel and enables them to focus on more critical tasks, thereby improving overall operational efficiency.
4. Due to the low friction coefficient of molybdenum disulfide, the friction resistance generated between friction equipment is small, which can save power consumption. According to the measurement of brother units, the power saving can be 12%.
The friction coefficient of MoS₂ is typically 0.02–0.05 in dry conditions, compared to 0.1–0.2 for most grease-lubricated metal surfaces. This reduced friction translates to lower energy losses in mechanical systems, which can lead to significant energy savings over time. In addition to the 12% power saving cited, some studies have reported even higher energy efficiency improvements in heavily loaded or high-speed applications, where friction reduction has the greatest impact on performance.
5. It can reduce mechanical wear, prolong the service life of friction equipment, reduce the loss of equipment parts, and improve the attendance rate of the equipment.
The extreme pressure (EP) properties of MoS₂ create a protective film on metal surfaces that adheres strongly even under heavy loads. This film acts as a sacrificial layer that prevents metal-to-metal contact, thereby reducing wear rates and extending component life. Bearings, gears, and sliding mechanisms treated with MoS₂ have been shown to exhibit 3–5 times longer service life compared to those using conventional lubricants. This increased durability translates directly to higher equipment availability and reduced spare parts inventory costs.
6. The application of molybdenum disulfide lubrication can solve technical problems and improve work efficiency and precision.
In precision equipment such as machine tools, coordinate measuring machines, and optical instruments, the consistent low friction and high stability of MoS₂ enable smoother motion and more accurate positioning, directly enhancing product quality and manufacturing precision. Moreover, in extreme environments—such as high vacuum, extreme temperatures, or radiation—where liquid lubricants fail, MoS₂ provides a reliable lubrication solution that enables processes and equipment that would otherwise be impossible. This capability has made MoS₂ an indispensable material in the aerospace, semiconductor, and nuclear industries.
Clean, Long-Lasting and Energy-Saving Solid Lubrication
Key Applications of Molybdenum Disulfide
1. Lubrication Industry: MoS₂ is widely used as a solid lubricant in greases, oils, and bonded coatings. Its layered crystal structure allows adjacent layers to slide easily over each other under shear stress, providing extremely low friction coefficients even under heavy loads and high temperatures. Common applications include automotive engine components, industrial gearboxes, conveyor systems, and high-performance bearings.
2. Aerospace and Defense: MoS₂'s ability to function in vacuum and extreme temperatures (from -185°C to 350°C) makes it the lubricant of choice for spacecraft mechanisms, satellite components, and military equipment. It is used in actuators, gimbals, hinges, and fasteners where conventional lubricants would evaporate or decompose.
3. Catalysts: Molybdenum disulfide is an effective catalyst for hydrodesulfurization (HDS) and hydrogenation reactions in petroleum refining. Its edge sites are catalytically active for breaking C-S bonds in organic sulfur compounds, removing sulfur from crude oil fractions to meet environmental regulations. MoS₂ is also being explored as a low-cost alternative to platinum for the hydrogen evolution reaction (HER) in water-splitting applications.
4. Energy Storage: MoS₂ has a layered structure with high specific surface area and theoretical capacity, making it a promising electrode material for lithium-ion batteries and supercapacitors. Its ability to intercalate lithium ions between layers enables high charge-discharge efficiency and cycle stability.
5. Electronic and Optoelectronic Devices: As a two-dimensional semiconductor with a thickness-dependent direct bandgap (1.8 eV for monolayer), MoS₂ is a candidate material for next-generation electronic devices such as transistors, photodetectors, and flexible electronics.
6. Coatings: MoS₂ is applied as a dry film lubricant in bonded coatings for fasteners, bearings, and sliding components, providing durable lubrication that resists corrosion and galling. These coatings are particularly useful in applications where oil and grease cannot be used due to contamination risks.
MoS₂ Applications in Lubrication, Catalysis, Energy and Coatings
Particle size and purity will affect the product's price, and the purchase volume can also affect the cost of particle size. A large amount of large amount will be lower. The price of particle size can be found on our company's official website.
Molybdenum Disulfide supplier
Luoyang Tongrun Nano Technology Co. Ltd. (TRUNNANO) Luoyang City, Henan Province, China, is a reliable and high-quality global chemical material supplier and manufacturer. It has more than 12 years of experience providing ultra-high quality chemicals and nanotechnology materials, including Zinc sulfide, nitride powder, Zinc sulfide powder, sulfide powder, and 3D printing powder. If you are looking for high-quality and cost-effective Molybdenum Disulfide, you are welcome to contact us or inquire at any time.
