Structure and physical properties Molybdenum disulfide
What is Molybdenum disulfide?
Molybdenum disulfide is an inorganic compound composed of molybdenum and sulfur. Its chemical formula is MoS. The compound is classified as a transition metal dichalcogenide. A silvery black solid occurs as the mineral molybdenite, the principal ore for molybdenum. MoS2 is relatively unreactive. It is unaffected by dilute acids and oxygen. In appearance and feel, molybdenum disulfide is similar to graphite. It is widely used as a dry lubricant because of its low friction and robustness. Bulk MoS2 is a diamagnetic, indirect bandgap semiconductor similar to silicon, with a bandgap of 1.23 eV.2.
Product of Molybdenum disulfide
MoS2 is naturally found as either molybdenite, a crystalline mineral, or jordisite, a rare low-temperature form of molybdenite. Molybdenite ore is processed by flotation to give relatively pure MoS2. The main contaminant is carbon. MoS2 also arises by thermal treatment of virtually all molybdenum compounds with hydrogen sulfide or elemental sulfur and can be produced by metathesis reactions from molybdenum pentachloride.
Structure and physical properties
All forms of MoS2 have a layered structure, in which a plane of molybdenum atoms is sandwiched by planes of sulfide ions. These three strata form a monolayer of MoS2. Bulk MoS2 consists of stacked monolayers held together by weak van der Waals interactions. Crystalline MoS2 exists in one of two phases, 2H-MoS2 and 3R-MoS2, where the "H" and the "R" indicate hexagonal and rhombohedral symmetry, respectively. In both structures, each molybdenum atom exists at the center of a trigonal prismatic coordination sphere and is covalently bonded to six sulfide ions. Each sulfur atom has pyramidal coordination and is bonded to three molybdenum atoms. Both the 2H- and 3R-phases are semiconducting. A third, metastable crystalline phase known as 1T-MoS2 was discovered by intercalating 2H-MoS2 with alkali metals. This phase has tetragonal symmetry and is metallic. The 1T-phase can be stabilized through doping with electron donors such as rhenium or converted back to the 2H-phase by microwave radiation. The 2H/1T-phase transition can be controlled by incorporating S vacancies.
Price of Molybdenum disulfide
Molybdenum disulfide particle size and purity will affect the product's Price, and the purchase volume can also affect the cost of Molybdenum disulfide. A large amount of large amount will be lower. The Price of Molybdenum disulfide is on our company's official website.
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