Tungsten Oxide

A WO 3 –graphene photocatalyst has been developed that can degrade the dye Rhodamine B almost completely in 15 minutes. This is much faster than the degradation times that can be achieved by bare WO 3  or TiO 2 . The catalyst consists of a porous WO 3  framework with a graphene film and is directly produced via electrospinning. The authors from China and the USA envision that this potent electrocatalyst can be used in environmental applications for the degradation of pollutants under visible light. The superior properties of the photocatalyst can be explained by its components and structure. The WO 3  nanoframework efficiently absorbs visible light due to multiple reflections in the pores. A rapid charge transfer to graphene takes place, which avoids charge recombination. Additionally, graphene nanosheets are exposed on the surface. This enables π–π conjugation between graphene and dyes leading to high adsorption rates of the substrate on the catalyst material. These...

Sewer is the integral part of infrastructure in a city which plays an irreplaceable role in the living environment of safety, construction and comfortable. In recent years, the corrosion degradation has caused many social problems, such as the collapse of the road, and thus attracted widespread attention.   Sewer corrosion mainly brought out by the oxidation of sulfur-oxidizing bacteria and generated the sulfuric acid and hydrogen sulfide which constantly corrode the pipe surface. In the past, anti-corrosion protection of concrete structures sewer facility is mainly used in the surface coating or a coating method for coating a sheet of resin-based material. These methods have a big challenge in terms of construction; besides, the adhesion and anti-scratch is weak; with relatively short life (only 3 to 6 years). Therefore, a new material with strong anti-corrosion is called.   Recently, studies have shown that tungsten oxide and nickel as the antimicrobial agent doped...

Curtains have been around for many years without much improvement. The small advances that have been made, such as motorized shades and smart glass, can be extremely expensive and complex to install. Latest, the smart glass window Wi-Fi enabled has been invented. According to the manufacturer, this kind of film maybe revolutionizes the industry of windows and curtains. So, you may ask: what is digital shade? Digital shade (or smart film) is a technology that allows the color of the film to go from transparent to non-transparent when you apply a current through it, also the level of transparency is able to control. The tungsten oxide smart glass window film with Wi-Fi will give you the option for privacy on demand by adjusting the amount of light traveling through your glass window; and with the multi-purpose, it can used in the commercial, home use, such as meeting rooms, offices, living room, dining room and bathrooms.   The tungsten oxide smart film is based on digital...

In tungsten oxide smart glass, the electrochromic material changes its opacity: it changes between a colored, translucent state (usually blue) and a transparent state. A burst of electricity is required for changing its opacity, but once the change has been effected, no electricity is needed for maintaining the particular shade which has been reached. Darkening occurs from the edges, moving inward, and is a slow process, ranging from many seconds to several minutes depending on window size. Electrochromic glass provides visibility even in the darkened state and thus preserves visible contact with the outside environment. It has been used in small-scale applications such as rearview mirrors. Electrochromic technology also finds use in indoor applications, for example, for protection of objects under the glass of museum display cases and picture frame glass from the damaging effects of the UV and visible wavelengths of artificial light. Tungsten oxide smart glass with electrochr...

Tungsten oxide (WO3) is an extremely important high-tech materials, this material is non-linear, high-dielectric constant, electrochromic, with gas detection, chemical catalysis and other features. For the features of WO3, the nano-powder of WO3 can be fired into varistor ceramics, ceramic capacitors, light (electricity) color ceramic film, gas-sensing ceramics, photocatalytic degradation ceramic membrane, battery electrode ceramic materials, microwave absorbing ceramic film, new high-temperature thermoelectric ceramics and functional ceramics and ceramic films, which has great potential in many chemical, energy, electricity and other fields. There are two preparation methods of ceramic raw materials, that mechanical disruption and synthesis. The former one uses mechanical principle crushing coarse particles to obtain fine powder, which has the advantages of large amount of production and low cost, but there are problems of impurities mixed in the crushing process, and it is dif...

The nonlinear tungsten oxide ceramic (pressure-sensitive behavior) was first reported by Makarov in 1994, and it’s pointed out that it can be used as a low pressure-sensitive materials in the field of microelectronics since the WO3 ceramics has low varistor voltage. But there are not further studies and reports in earlier studies about behavior origin and mechanism of WO3 ceramics issues. Research shows that the varistor characteristics of WO3 ceramic is different from traditional ZnO and SnO2 Varistor material, the conventional Schottky barrier model can not explain the behavior of WO3 ceramic varistor yet, so the conventional grain boundary Schottky barrier model needs to be modified. In view of which, WO3 ceramics was prepared, and the mechanism of the pressure-sensitive characteristics were studied, and amendments WO3 ceramic grain boundary Schottky barrier model was proposed. Undoped WO3 ceramics sintered has obvious varistor behavior, AES spectra shows the ceramic crys...

Tungsten oxide film is an important functional material, it’s been used in the system because of its excellent electrochromic properties. The main evaporation materials used in Electron beam evaporation preparing electrochromic WO3 film are WO3 powder and WO3 target. More current research is on the WO3 powder as evaporation material, but the form of powder is generally inappropriate, so the evaporation material is chosen. So choosing WO3 target as a evaporation material is an optimization program. However, there are few reports of WO3 target preparation at home or abroad. WO3 target prepared in domestic laboratories has disadvantages of low density or impure, so the preparation of high purity and high density WO3 target is significant. To prepare high purity ultra-compact WO3 target, it can be researched in powder, forming and sintering, the optimal combination of which is the necessary condition to achieve the above goals.  (1) Preparation of WO3 powders of high purity,...