Molybdenum Selenide

Molybdenum Selenide powder is a grey-black, hexagonal crystalline layered structure, chemically stable, water insoluble, semiconducting, etc. and has important applications in many fields.

Properties

Chemical formula: MoSe₂.

Molecular weight: 253.86 g/mol.

CAS No.: 12058-18-3.

Appearance: Grey-black powder.

Density: about 6.90 g/cm³.

Melting point: above 1200°C.

Stability: chemically stable at room temperature and pressure, but may react under certain conditions with strong oxidising agents, acids, etc.

Solubility: insoluble in water.

Crystal structure: Molybdenum selenide has a layered structure similar to that of molybdenum disulphide, each layer consists of countless hexagons and belongs to the hexagonal crystal system, the cell parameters a and b are 0.329nm, c is 1.289nm, α and β are 90°, γ is 120°.

Electrical properties: Molybdenum Selenide has semiconductor properties, its forbidden band width is about 1.4ev, electron mobility is high, the carrier mobility of single-layer molybdenum diselenide is about 19cm²V-¹s-¹, and the electron mobility of double-layer molybdenum diselenide is about 65cm²V -¹s-¹, the corresponding current switching ratio is 5×10⁵, and the hole mobility is about 9cm²V-¹s-¹, the corresponding current switching ratio is 7×10⁴.

Optical properties: the absorption and emission of light show special properties, in the field of optoelectronic devices and other important applications, such as light-emitting diodes and light modulators as a material.

Mechanical properties: Molybdenum Selenide has excellent structural rigidity and anti-wear properties, when used as a solid lubricant, it can effectively reduce the coefficient of friction and wear, and can be used under extreme conditions such as high temperature and high pressure.

Catalytic properties: It shows good electrocatalytic activity and can be used as catalysts in a variety of chemical reactions, such as in the hydrogen precipitation reaction (HER) and oxygen reduction reaction (ORR), which shows high catalytic activity and is suitable for fuel cells and other electrochemical devices.

Applications

Electronics and semiconductors

Transistor manufacturing: Molybdenum Selenide can be used in the manufacture of thin film transistors due to its semiconducting properties, playing an important role in integrated circuits and helping to improve the performance and operating speed of electronic devices.

Solar cells: capable of efficiently converting solar energy into electricity, they can be used as materials for photovoltaic cells and solar panels, providing a promising alternative for the use of renewable energy, and have broad application prospects in the field of solar power generation.

Energy storage field

Lithium-ion batteries: As an electrode material for lithium-ion batteries, molybdenum selenide has a high theoretical specific capacity and good cycling stability, which can improve the charging and discharging efficiency and service life of the battery, and provide support for the research and development of high-performance lithium-ion batteries.

Potassium ion batteries: Molybdenum selenide is used in potassium ion batteries to enhance the diffusion speed of potassium ions and increase the theoretical capacity of the batteries, which is expected to become a substitute for lithium ion batteries and is of great significance in the future energy storage field.

Lubrication field

Solid lubricant: Molybdenum selenide has excellent structural rigidity and anti-wear properties, in high temperature, high pressure and other extreme conditions, as a solid lubricant added to the lubricating oil or grease, can effectively reduce the coefficient of friction, reduce wear and tear of mechanical parts, to prolong the service life of the equipment, is widely used in aerospace, automotive manufacturing, machining and other fields.

Optoelectronic field

Photodetector: high sensitivity to light, can quickly and accurately convert optical signals into electrical signals, can be used to manufacture high-performance photodetectors, in the field of optical communications, image sensing and other important applications.

Optical modulator: Molybdenum Selenide’s special optoelectronic properties enable it to modulate the intensity and phase of light, etc. It can be used as a key material for optical modulators, which can be used for signal transmission and processing in optical communication networks to improve the performance and capacity of communication systems.

Catalytic field

Hydrogen precipitation catalysts: exhibiting good electrocatalytic activity, they can reduce the activation energy of the reaction and increase the reaction rate in the hydrogen precipitation reaction, and can be used as highly efficient hydrogen precipitation catalysts in electrochemical devices such as fuel cells, which provide support for the conversion and utilisation of clean energy.

Photocatalysts: under light conditions, they can generate photogenerated carriers with strong redox ability, and can be used in photocatalytic reactions such as degradation of organic pollutants and decomposition of water to produce hydrogen, which have important application values in the fields of environmental protection and energy conversion.

Nanotechnology

Preparation of nanomaterials: Molybdenum Selenide can be used to prepare a variety of nanostructured materials such as nanowires and nanotubes, etc. These nanomaterials have unique physical and chemical properties, and can be applied to nanoelectronic devices, nano-sensors, etc., which promotes the development of nanotechnology.

Sensor field

Gas sensors: they have special adsorption and reaction properties for certain gases, and their electrical properties will change with the change of gas concentration, which can be used to manufacture highly sensitive gas sensors to achieve rapid detection and monitoring of harmful gases, environmental pollutants, etc., and have a wide range of application prospects in the fields of environmental monitoring and industrial safety.

Biosensor: Molybdenum Selenide has good biocompatibility and electrochemical properties, and can interact specifically with biomolecules, and can be used to construct biosensors to achieve rapid and sensitive detection of biomolecules, with potential applications in biomedical diagnostics, food safety testing and other fields.

Medical field

Cancer optical therapy: It can be used as the response material for near-infrared light, with the characteristics of suitable band gap, excellent photothermal properties and strong near-infrared light capture ability, and can be used as the photothermal therapeutic agent or photodynamic therapeutic agent in the optical therapy of cancer to achieve targeted killing of the tumour cells, which has the advantages of small toxic side effects, minimally invasive, and high therapeutic efficiency.