Preparation method and application of molybdenum disulfide MoS2

Koalas were declared endangered in eastern Australia on Friday, with more and more koalas dying from disease, habitat loss, and other threats. Earlier, the koala was considered a vulnerable species, and the Commonwealth Department of the Environment changed its protection level to endangered on the east coast of Queensland, New South Wales, and the Australian Capital Territory. Many koalas in Australia are infected with chlamydia. The disease can cause blindness, infection, and infertility. Last year, the Australian Koala Foundation said Australia had lost about 30 percent of its koala population in the past three years. Without immediate action, the species could become extinct by 2050.
Unlike koalas, which are on the brink of extinction, the market demand for molybdenum disulfide MoS2 will grow substantially.

Molybdenum sulfide MoS2 power overview

Molybdenum disulfide MoS2 is an inorganic substance with the chemical formula MoS2, which is the main component of molybdenite. Black solid powder with metallic luster. Molybdenum disulfide is an inorganic substance with the chemical formula MoS2, which is the main component of molybdenum ore. Black solid powder with metallic luster and smooth hand feeling. The specific gravity is 4.8, and the Mohs hardness is 1 to 1.5. The general friction coefficient is 0.05~0.09. The oil absorption value is 1~1.5. Melting point is 1185℃, sublimation at 450℃. In the atmosphere, the temperature starts to oxidize gradually at about 400°C. As the particle size becomes finer, the oxidation temperature gradually decreases, and the oxide is molybdenum trioxide. Insoluble in dilute acid, dilute alkali, solvent, petroleum, synthetic grease. It can be corroded by aqua regia, concentrated sulfuric acid and boiling concentrated hydrochloric acid. Strong chemical and thermal stability. Does not chemically react with general metal surfaces and does not corrode rubber materials.

Preparation method of molybdenum disulfide MoS2 power

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-MoS2 at home and abroad.

MoS2 can be prepared by the natural method, namely the molybdenite concentrate purification method, which is to remove the acid-insoluble matter, SiO2, Fe, Cu, Impurities such as Ca and Pb are further refined to obtain nano-MoS2. The American Climax Molybdenum Company has adopted this method to produce MoS2. The nano-MoS2 made by this method can maintain the natural MoS2 crystal shape, has good lubricating performance, and is suitable for making lubricants. However, the purity of the nano-MoS2 produced by the natural method is not high, and the purification technology needs to be further improved. When the temperature is lower than 400 ℃, it is recommended to use the lower cost MoS2 when working in the ordinary atmosphere. It has lubricating ability below 1300 ℃, and it is recommended to use the 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. Therefore, the production of 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 method and chemical method combination and many more. In general, there are two preparation methods. You can directly react a tungsten source or a molybdenum source with a sulfur source to obtain nano-MoS2, or first react a tungsten source or a molybdenum source with a sulfur source to obtain a precursor, and then pass the precursor through an appropriate Method to decompose or reduce to MoS2.

Application of Molybdenum sulfide MoS2 power

Molybdenum disulfide MoS2 is an important solid lubricant, especially suitable for high temperature and high pressure. It is also diamagnetic, can be used as a linear photoconductor and a semiconductor showing P-type or N-type conductivity, and has a rectifying and energy function. Molybdenum disulfide can also be used as a catalyst for the dehydrogenation of complex hydrocarbons.

Also known as "the king of advanced solid lubricants." Molybdenum disulfide is a solid powder made from natural molybdenum concentrate through chemical purification and changing the molecular structure. This product is black, slightly silver-gray, metallic luster, smooth to the touch, insoluble in water. This product has the advantages of good dispersibility and non-stickiness. It can be added to various greases to form a non-stick gel state, which can increase the lubricity and extreme pressure of the grease. It is also suitable for high-temperature, high-pressure, high-speed, and high-load mechanical working conditions to extend the life of the equipment. The main function of molybdenum disulfide in friction materials is to reduce friction at low temperatures and increase friction at high temperatures, resulting in a small loss on ignition. It is volatile in friction materials.

Anti-friction properties: MoS2 grinded by supersonic jet has a particle size of 325-2500 mesh, particle hardness of 1-1.5, and friction coefficient of 0.05-0.1, which can reduce friction when used in friction materials;

Increase friction: Molybdenum disulfide MoS2 does not conduct electricity. There are copolymers of molybdenum disulfide, molybdenum trisulfide and molybdenum trioxide. When the friction material rises sharply due to friction, the molybdenum trioxide particles in the copolymer expand with the increase in temperature to increase the friction;

Anti-oxidation: MoS2 is obtained by chemical purification and comprehensive reaction. Its PH value is 7-8, which is slightly alkaline. It covers the surface of the friction material to protect other materials and prevent them from being oxidized, especially to prevent other materials from falling off and enhance adhesion;

In addition, molybdenum disulfide MoS2 can also become a new material for making transistors. Compared with graphene, which is also a two-dimensional material, the energy band gap of molybdenum disulfide is 1.8 eV, while graphene has no energy band gap. Therefore, molybdenum disulfide may have a broad application space in the field of nano-transistors. Moreover, the electron mobility of a single-layer molybdenum disulfide transistor can reach about 500 c㎡/(V•s), and the current switching rate can reach 1×10^8.

Molybdenum disulfide MoS2 power price

The price of molybdenum disulfide MoS2 varies randomly with factors such as production costs, transportation costs, international conditions, exchange rates, and the supply and demand relationship of the molybdenum disulfide MoS2 market. Tanki New Materials Co.,Ltd. aims to help various industries and chemical wholesalers find high-quality, low-cost nanomaterials and chemicals by providing a full set of customized services. If you are looking for molybdenum disulfide MoS2 material, please feel free to contact to get the latest price of molybdenum disulfide MoS2.

Molybdenum disulfide MoS2 power supplier

As a global supplier of molybdenum disulfide MoS2, Tanki New Materials Co.,Ltd. has extensive experience in the performance, application and cost-effective manufacturing of advanced engineering materials. The company has successfully developed a series of powder materials (zinc sulfide, tungsten sulfide, bismuth sulfide, etc.), high-purity targets, functional ceramics and structural devices, and provides OEM services.

Since the beginning of this year, China's macro policies have made continuous efforts to stabilize economic growth. America and Europe are raising interest rates to control inflation. On March the European Central Bank left its three key interest rates unchanged and began to scale back its asset-purchase programme. Then the Federal Reserve raised the target range of the federal funds rate by 25 basis points to 0.25%-0.5%. The accelerated tightening of monetary policies in the US and Europe pushed capital back to the US and increased interest rates, which will definitely increase the risk of RMB depreciation and capital outflow. The price and market of the molybdenum disulfide MoS2 will also be affected, resulting in a range of fluctuations. You are welcome to contact us for the latest quotation of molybdenum disulfide MoS2.

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