Tungsten oxide ultrathin nanosheets obtained by supercritical carbon dioxide. At the beginning of the stripping, smaller nanosheets 5-10 nm in diameter are randomly dispersed and have no significant orientation. Nanosheet lattice spacing 0.37 nm, corresponding to the (120) face of tungsten oxide.

The ultra-thin nanosheets Raman scattering spectra are very sensitive to the vibration and lattice defects of the W-O bond, which is a good way to characterize the samples. As can be seen from the figure, the prepared ultrathin nanosheets have two characteristic peaks: 645 and 943 cm. The peak at 943 cm corresponds to the stretching vibration of the W = O bond in the structural unit. The peak at 645 cm corresponds to the tensile vibration mode of the W-O bond.

Tungsten oxide thin nanosheets preparation principle is the use of supercritical carbon dioxide device assisted stripping tungstic acid. One supercritical carbon dioxide device is a two-cylinder piston pump, a high-pressure reactor, a heating jacket and a temperature controller.

The semiconductor material is used as a photocatalyst, due to the limitation of the photocatalytic mechanism, photogenerated electrons and holes can easily be recombined inside and on the surface of the material to affect the photocatalytic efficiency. Pure tungsten oxide nanomaterials also have this problem. By constructing semiconductor / semiconductor heterostructures with other semiconductors, the effective separation of photogenerated electrons and holes can be well promoted, and recombination of photogenerated electron-hole pairs can be avoided.

At present, many indoor air purifier can be used effectively to provide indoor clean air. These air purifiers equipped with HEPA folding filter can be used to remove particulate pollutants. Only HEPA filter nets need to be replaced for 3 months. Frequent replacement of expensive HEPA filters has greatly increased the burden of public consumers.

As far as today's world is concerned, photocatalysis is undoubtedly one of the most promising technologies. It shows the application of solar energy in many aspects, such as photolysis of water to obtain hydrogen energy, treatment of polluted water and so on.

Pyrochlore-type tungsten oxide is a special form of tungsten trioxide, which uses the WO₆ octahedron as the structural unit to form a layered structure with circular tunnels through the corner top of the rigid skeleton of W-O. Due to its special physical and chemical properties, it is widely used in the fields of catalysis, sensing, electronics and other materials science.

The power generated by a nuclear power plant reactor is generally controlled by lifting or reducing the control rod components in the reactor core. The fuel assembly of modern reactor core typically uses two types of rod control components to control reactivity, namely the rod and beam control assembly (RCCA) and the ash rod control module (GRCA). Both are made up of a number of neutron absorbers fastened to a common hub disk or a multi - foot frame at the top of its top.

Plastic products are widely used in building materials industry. They are light, cheap, and convenient to use. Mineral used in plastic packing can greatly reduce the cost of plastic products, and has a certain role in enhancing the application of tungsten tailings as plastic filler.

Metal doping refers to a variety of substances mixed together. In the chemical, materials and other fields, doping generally refers to the incorporation of small amounts of other elements or compounds in such materials or substrates to improve the properties of a material or substance. Doped materials, substrates can produce specific electrical, magnetic and optical properties, so that it has a specific value or use.