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Tungsten oxide powder is not only a transparent thermal insulation material, but a photocatalyst, which has good visible light absorption capability with a band gap of about 2.7eV. Generally, it is considered that the suitable photocatalyst has a band gap of 1.8eV. In the study of the photocatalytic properties of tungsten trioxide, a more important research is using tungsten trioxide for photodecomposition of water to produce hydrogen. The conduction band and valence band positions of tungsten trioxide are around 0.7eV…

Tungsten oxide may be applied for manufacturing thermal insulation dispersion, and thus be used in the field of thermal insulation, such as glass window, glass door, and so on. It may also be used as a photocatalyst. Tungsten oxide has excellent light stability and various sources. And it is environmentally friendly. However, tungsten oxide has low photocatalytic activity due to its low conduction band position, which limits the effective separation of photogenerated carriers. Therefore, the research on the tungsten oxide…

Tungsten oxide may not only be applied for producing thermal insulation dispersion liquid, but be used as a photocatalyst in water splitting for hydrogen production. The all tungsten based Z-scheme composite photocatalyst (composed of WO3?0.33H2O and PbWO4) may be synthesized via liquid phase ion-exchange method. The photocatalytic performance test showed that the apparent photodegradation rate constants of RhB over composites are more than 6 to 8 times higher than that of two monomer components. The PL spectroscopy test showed that…

Tungsten oxide is not only a near infrared shielding material, but a photocatalyst. The interstitial carbon doping orthorhombic tungsten trioxide hydrate (C-doped WO3?0.33H2O) may be synthesized via the room temperature liquid phase method. The optical property and theoretical calculation of carbon doped sample have been studied to find that the carbon doping narrowed the Eg (energy gap), improved visible-light absorption and a new level formed above the valence band. And PL spectra show the recombination of photo-generated carriers is suppressed…

Tungsten oxide is not only a type of infrared thermal insulation nano material, but a photocatalytic material. Orthorhombic hydrate tungsten trioxide (o-WO3?0.33H2O) flower-like hierarchical structure may be synthesized via solvothermal method by regulating the amount of acetone. And the photocatalytic testing was carried out and the results showed that flower-like hierarchical structure tungsten trioxide hydrate displays superior photocatalytic performance than thorn sphere tungsten trioxide hydrate. And 88.5% of RhB may be eliminated after 240min. The results also showed that: Compared…

Tungsten oxide is not only a transparent thermal insulation nanopowder, but a photocatalyst. Cubic tungsten trioxide hemihydrates (c-WO3?0.5H2O) may be synthesized via solvothermal method by regulating the amount of acetone and urea, whose size is from 120nm to 180nm. The study found that the crystal water of cubic tungsten trioxide hemihydrate has an important effect on photocatalytic property and the reason has been discussed. The photocatalytic activity decreased when crystal water of as-prepared sample has been removed. While the photocatalytic…

Tungsten oxide is not only a type of infrared ultraviolet shielding material with high transparency, but a photocatalyst with good catalytic performance. Hexagonal tungsten trioxide (h-WO3) with ultrathin nanosheet can be synthesized via hydrothermal method to study the role of urea in the growth process of WO3. The thickness of as-prepared ultrathin nanosheet is about 5nm. Compared with hexagonal tungsten trioxide nanowire and nanorod of the same crystal phase, the as-prepared hexagonal tungsten trioxide ultrathin nanosheet displays superior photocatalytic activity.…

Tungsten oxide is not only a type of transparent thermal insulation material, but the one of the earliest investigated photocatalyst that has been considered as the most effective way for treatment of environmental pollution. Due to the properties of environmental friendly and excellent stability, tungsten oxide has been widely applied in photocatalytic O2 evolution, photoelectrochemical cell and photocatalytic pollutant removal. You will remember that there is photocatalytic technology when it comes to photocatalyst. What is photocatalytic technology? Photocatalytic technology, which…

Nano grain size yellow tungsten oxide is a infrared heat insulation material, which may be used in architectural glass with high transparency and thermal conductivity, thereby it is necessary to impart the glass with thermal effects and ensure the visible light transmittance of the glass. The yellow tungsten oxide heat-insulating material may be coated on the surface of the glass to form a uniform transparent coating film. And the nano-conductive particles in the coating film contain a certain concentration of…

Nano grain size yellow tungsten oxide is a near infrared shielding material that may be used in building glass to play a role of heat insulation, in the form of coating or film. This type of material has high UV shielding performance, and the ultraviolet shielding rate is as high as 99%, thereby providing a safe “sun protection umbrella” for residents and other personnel in such buildings, without pollution. Also, it reduces the energy costs on air conditioning. At the…