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Tungsten disulfide nanosheet (WS? nanosheet) is a typical transition metal tungsten compound. There are many different preparation methods, each of which has its own unique principles, operation procedures, advantages and disadvantages. Mechanical exfoliation Mechanical exfoliation is a classic two-dimensional material preparation technology that separates a single-layer or few-layer WS? nanosheet from bulk materials by physical means. This method uses tape to repeatedly stick bulk WS? crystals, or uses a special mechanical device to apply external force to overcome the weak…

Tungsten disulfide nanosheet (WS? nanosheet) is a typical two-dimensional nanomaterial with a large specific surface area, a low friction coefficient, good electrochemical performance, and optical properties. It has great potential in the fields of nanoelectronics, optoelectronic devices, flexible electronics, lubricating materials, and chemical catalysis. So, what are the factors that affect tungsten disulfide nanosheet performance? Chemical composition Tungsten disulfide nanosheet is an inorganic compound composed of tungsten and sulfur. Tungsten atoms are surrounded by six sulfur atoms in an octahedral…

Tungsten disulfide nanosheet (WS? nanosheet), as a typical transition metal sulfide material, is a semiconductor material with a hexagonal crystal structure (space group P6?/mmc). Each layer is a sandwich structure formed by a W atomic layer sandwiched between two S atomic layers. Research indicates that a single layer of WS? has a direct band gap of about 1.8eV, enabling it to exhibit a quantum efficiency superior to that of indirect-band-gap semiconductors in the optoelectronic device field. The room-temperature carrier mobility…

When considering why the honeycomb-electric-field oil-fume purifier selects the tungsten needle as its core component, one must deeply understand the unique properties of the tungsten needle and its crucial role in the oil-fume purification process. In brief, the working principle of the honeycomb-electric-field oil-fume purifier is to utilize an ionization-separation structure similar to the superposition of honeycomb cylinders. The cathode tungsten needle discharges, ionizing the oil-fume exhaust-gas molecules into positively-charged particles, which are then adsorbed by the surrounding anode tube…

High-density tungsten alloy is mainly made of tungsten (usually between 85% and 99%) as the matrix, with nickel, iron, copper and other elements added through the powder-metallurgy process. It is characterized by high density, high strength and hardness, good electrical and thermal conductivity, a small thermal-expansion coefficient, excellent corrosion and oxidation resistance, good machinability and weldability, and outstanding radiation-absorption capacity. Due to its unique properties, high-density tungsten alloy has numerous applications. Aerospace In the aerospace field, high-density tungsten alloy is…

Tungsten disulfide nanosheet (WS? nanosheet) is a two-dimensional nanomaterial with a unique structure. Its crystal structure consists of a layer of tungsten atoms sandwiched between two layers of sulfur atoms, forming a sandwich-like layered arrangement through covalent bonds and van der Waals forces. This structure gives WS? nanosheet excellent physical and chemical properties, making it widely used. In the field of lubrication, tungsten disulfide nanosheet is known as “revolutionary material in the field of lubrication.” Its ultra-low friction coefficient and…

Tungsten oxide is a typical transition metal oxide and a common tungsten compound. Its chemical formula is usually expressed as WO?, but in practical applications, due to the existence of oxygen vacancy, its chemical composition may deviate from the ideal stoichiometric ratio, so it is often expressed as WO??? (where x is between 0 and 1). This oxygen vacancy phenomenon causes tungsten to be pentavalent or tetravalent in tungsten oxide, further enriching its physical and chemical properties. The crystal structure…

In the context of increasing environmental awareness today, how to efficiently degrade organic pollutants has become an important topic in the field of scientific research. Tungsten oxide (WO?-x), as an emerging photocatalytic material, is gradually emerging in this field and has attracted the attention of many researchers. Its emergence has brought new hope and possibilities for solving the problem of organic pollutants. 1. Basic characteristics of tungsten oxide Tungsten oxide, an inorganic compound made up of tungsten and oxygen, has…