Metal oxides play a key role in the development of many advanced functional materials and smart devices. Among many metal oxides, tungsten trioxide (WO₃) is a kind of unique material, which has attracted much attention due to its versatility. For example, WO₃ is an n-type semiconductor with various crystal forms, band gap width of 2.5-2.8ev, and visible light response characteristics. Therefore, WO₃ can be used as light sensing device, photochromic device, transparent electrode, visible light catalyst, etc.

Tungsten oxide is a typical transition metal oxide with a band gap of 2.4-2.8ev, which belongs to a typical n-type semiconductor. In addition to catalysis, electrochromism, battery electrode, solar energy absorbing material and invisible material, tungsten oxide also has the properties of semiconductor functional materials such as pressure sensitive, thermal sensitive and gas sensitive.

In recent years, more and more researchers have paid attention to the preparation of core-shell inorganic / polymer nanocomposite particles by coating polymer on the surface of inorganic nano particles, which has broad application prospects in microelectronics, optoelectronics, biological and medical materials and other fields.

Tungsten disulfide with excellent lubrication performance is a kind of green solid lubricating material. It can be used as a high-temperature lubricant for reflow furnace lubrication, keeping the relevant parts work stably under high temperature.

Tungsten disulfide is a new lubricating material with excellent lubricating performance. Moreover, when it is applied in the lubrication of reflow furnace, there’s no formation of coke and no oil dripping. So it can be used to lubricate the pars of reflow furnace, effectively improving their service lives.

Tungsten disulfide can be used at high temperature, so it has high application in the lubrication of reflow furnace. Reflow soldering process is very strict in temperature control, which requires the lubricating material must have performance of high temperature resistance.

Cadmium sulfide nanocrystals are the most widely studied and the most promising class of II-VI semiconductor nanocrystals. Due to their important nonlinear optical properties, luminescent properties and other physical and chemical properties, they have attracted worldwide attention. As a very important semiconductor material, it has been widely used in many fields, such as various light-emitting devices, laser and infrared detection devices, infrared windows and nonlinear optical materials and photosensitive sensors. Especially cadmium sulfide can absorb visible light very well, so it is the first choice material of photocatalyst.

In the 21st century, the level of industrialization is developing rapidly, but the natural environment and ecology on which human beings depend for survival are seriously damaged, and there are a lot of poisonous and harmful gases in the air. Therefore, it is urgent to make a highly efficient and accurate detector to detect and prevent toxic and harmful gases.

Nano materials show a series of unique properties in micro scale, such as surface effect, quantum effect, small size effect, quantum tunneling effect and so on. Under the influence of these properties, nano materials, especially one-dimensional nano materials, show outstanding specific surface area, adsorption and desorption performance, which contributes to the development of one-dimensional materials.

Tungsten oxide film has important application value in display field because of its excellent electrochromic characteristics. It can effectively improve its electrochromic performance by doping a proper amount of FTO (fluorine doped tin oxide) nanocrystals. The display device prepared by the film has the characteristics of no blind angle, high contrast, low energy consumption, and can be used as electronic paper, indicator board, etc.