The synthesis of Molybdenum Disulfide Nanopowder (MoS2) are either synthesized by high temperature as mono and polycrystalline material or at low temperature using various electrochemical routes. The temperature required for high temperature technique is 800-900 °C (approx.) and for low temperature method is 110-140°C. The diameter of MoS2 nanoparticles is about 10-30 nm and these nanoparticles are mostly amorphous with round shape. They are chemically very stable, due this property of MoS2 nanoparticles; they are mostly used in catalysis and lubrication.

The Molybdenum Disulfide Nanopowder have very good chemical stability and thermal stability. Molybdenum disulfide nanoparticles possess good catalytic activity, and excellent physical properties. They also have a large active surface area, high reactivity, and increased adsorption capacity as compared to the bulk material. Due to its low friction property and robustness they can easily form a highly efficient dry lubricating film.

Molybdenum Disulfide Nanopowder are the inorganic compounds composed of two elements; molybdenum and sulphur. The molar mass of the MoS2 is 160.07 g/mol. Its appearance is quite similar to graphite. Molybdenum disulfide nanoparticles are shiny dark gray powder, having density 5.06 g/cm3, melting point 1185 °C and Mohs hardness of 1 to 1.5. The friction coefficient of these nanoparticles is ~ 0.03-0. They can be dissolved in aqueous and concentrated sulfuric acid, insoluble in water and dilute acid. The molybdenum disulfide nanoparticles can be used for processing and storage of spare parts; Maintenance lubrication adhesion and friction reduction technology.

Molybdenum Disulfide Nanopowder as a solid lubricant because of two reasons , one is Molybdenum sulfide is a transition metal dichalcogenide semi conductor material which exhibits a layered structure (consisting of covalently bound trilayers) between layers of sulfur atoms combined with weak easy-to-slide and showed good friction-reducing effect. Another one is exposure sulfur atoms of the crystal surface on the metal surface have a very strong adhesion to form a very solid film; therefore lubrication is superior to other general-lubricating materials. As compared with ordinary molybdenum disulfide, Nanoparticles of molybdenum disulfide has many excellent properties, such as : excellent friction, large active surface area, more adsorption capacity, high reactivity, catalytic properties, especially the performance of catalytic hydrogenation desulfurization more, can be used to prepare special materials, catalytic materials and gas storage.

Molybdenum Disulfide Nanopowder is a catalyst for coal liquefaction. As we know molybdenum disulfide nanoparticles can significantly increase the number of surface atoms which leads to the formation of more sulfur vacancy thus higher catalytic activity and selectivity can be achieved which is used for heavy oil conversion and oil refining hydrogenation. Nano-composite materials have many excellent physical properties (such as light, electricity, magnetism, catalysis, lubrication and other functions). Therefore, in composite application, MoS2 can be used as a nano-composite with polystyrene (PS) [PS/MoS2] which increases the conductivity and enhances the electrical property, thus can be used as a conductive filler.