Tungsten Oxide

Nano tungsten trioxide is a typical N-type semiconductor gas sensing material, which has a large specific surface area, stable chemical properties, a variety of toxic gases have good sensitivity, can effectively improve sensitivity and responsiveness of gas sensors effectively reduce the harmful effects of harmful gases on human health. The preparation of nano tungsten trioxide by hydrothermal method can overcome the problems that the nano rods prepared in the prior art have larger diameters, uneven distribution of rods and other forms of particles.  Using ammonium metatungstate as tungsten source, citric acid as the profile control agent, according to a certain proportion in the mixed solution, adding concentrated hydrochloric acid solution was adjusted by drops in pH magnetic stirring at room temperature is equal to 1.5, half an hour so that the magnetic stirring solution mixing, the mixed solution was transferred to a hydrothermal reaction kettle PTFE capacity of 100 mL in seal...

With the rapid development of industry, while bringing great economic benefits, the environmental pollution caused by the waste water is also becoming more and more serious. Organic industrial wastewater with high concentration and low biodegradability, deep color, complex composition, containing oil, acids, amines, demulsifier and other pollutants, organic wastewater is difficult to degrade, bring unpredictable effects and harm to the ecological system. The photocatalytic purification of organic compounds in water is a new technology, which uses the sun to degrade organic matter, energy saving and no pollution to environment, has great application prospect. Nano tungsten trioxide is a high quality n-type semiconductor material, as photocatalyst, n-type semiconductor has many kinds, such as TiO 2 , ZnO, Fe 2 O 3 , CdS and WO 3 . The results show that WO 3  has good photocatalytic stability and is an ideal catalyst for photocatalytic degradation of pollutants in w...

With the growing awareness of environmental protection and recycling of resources, more and more researches are being made on the degradation of organic pollutants. The photocatalytic degradation of organic compounds is a new technology, which uses sunlight to degrade organic compounds, saves energy and does not pollute the environment. Therefore, it has great application prospects. Nano tungsten trioxide is a high quality n-type semiconductor material, as a photocatalyst, WO 3  photocatalytic stability is good, photocatalytic degradation of air pollutants also has an ideal catalytic effect, and China is rich in tungsten reserves, ranking first in the world, WO 3  has a wide range of sources. In the role of purification of air, the main goal of nano tungsten trioxide is to improve the energy utilization efficiency of hydrogen and oxygen. Some scholars have summarized the nano tungsten oxide as a catalyst for several key factors: (1) Nanostructured mater...

Nano tungsten trioxide is a high quality n-type semiconductor material, with excellent gas sensitivity to H 2 S, NH 3 , H 2 O 3  and other gases are sensitive. In modern industry is often used to produce gas sensors and electrochromic device. A gas sensor is a device that converts the type of gas and its associated information into electrical signals so that it can detect, monitor, and alarm. Tungsten trioxide (WO 3 ) is a n-type semiconductor with wide band gap, its excellent sensitivity and selectivity makes it becomes the main material of the sensor elements. In the field of coal, petroleum, chemical, power and other production, using tungsten trioxide as a component of the sensor can be timely and accurate to flammable, explosive, toxic, harmful gas detection and automatic control. Tungsten trioxide sensor was first used to detect H 2 S and H 2 , Japanese scholars in 1992 for the first time reported WO 3  sintered coating on the very low concentrati...