Nano WO3 yellow tungsten has a large specific surface area and significant surface effect. It is a good catalyst. It can be used as both a main catalyst and an auxiliary catalyst, and it has a high selectivity to the reaction. WO3 has a strong ability to absorb electromagnetic waves and can be used as an excellent solar energy absorbing material and recessive material. WO3 is an n-type semiconductor material with excellent gas sensitivity and sensitivity to H2S, NH3, H2, O3 and other gases, so it can be used to make gas sensors.

In recent years, through the joint efforts of many domestic and foreign researchers, different degrees of progress have been made in improving the gas sensitivity and selectivity of WO3-based gas-sensitive materials, reducing the working temperature, and performing different doping and improving processes. In addition, the band gap energy of tungsten trioxide is about 2.5eV, and it has potential photocatalytic ability in visible light with a wavelength of <500nm. Therefore, WO3 has potential application prospects in the treatment of water polluted by organic dyes. The performance of nano-tungsten trioxide is greatly affected by its morphology, microstructure and composition. Therefore, it is necessary to study the preparation of nano-tungsten trioxide with different morphology and structure, and to explore the influence of its nano-size effect and special morphology effect on the gas-sensing and photocatalytic properties of nano tungsten trioxide.

Nano-tungsten trioxide mainly has the following application fields in gas sensing:

1. It is used for flammable gas leakage alarms and humidity sensors. The measured gases mainly include CO, CH4, H2, NH3, NO2, SO2, etc., which are mainly used in environmental monitoring applications.
2. For civil use, it can detect the leakage of natural gas, liquefied petroleum gas, city gas and other civil gas and the gas generated during cooking in the microwave oven to automatically control the cooking of food in the microwave oven. It can also detect some difficult conditions in public places such as houses and buildings. Smell the gas.
3. In industry, it is used to detect highly toxic gases such as carbon dioxide, nitrogen oxides, and sulfur oxides in the petrochemical industry; to detect hydrogen generated during the deterioration of power transformer oil; to detect the freshness of perishable foods such as meat; Detect the concentration of ethanol gas in the driver's breath in highway traffic to prevent drunk driving and reduce traffic accidents.

Application of Nano Tungsten Trioxide in the Field of Photocatalysis

With the development of science and technology and the progress of society, the content of refractory organic matter in the air and waste water is continuously increasing, which seriously threatens human health, which has attracted people's attention. As people's awareness of environmental protection and resource recycling continues to grow, there are more and more studies on the degradation of organic pollutants. Photocatalytic degradation of organic matter is a new technology, which uses sunlight to degrade organic matter, saves energy and does not pollute the environment, and has great application prospects.

There are many types of n-type semiconductors as photocatalysts, including TiO2, ZnO, Fe2O3, CdS and WO3. Studies have shown that WO3 has good photocatalytic stability and has an ideal catalytic effect on photocatalytic degradation of pollutants in water. Moreover, my country is rich in tungsten reserves, ranking first in the world, and WO3 has a wide range of sources.
Nano-tungsten trioxide mainly has the following applications in photocatalysis:

1. Application in the field of air purification. The photocatalytic technology in the field of air purification means that photocatalysis can directly use oxygen in the air as an oxidant, effectively decompose indoor and outdoor organic pollutants, and oxidize and remove nitrogen oxides, sulfides, and various odors in the atmosphere. The reaction conditions are mild, which is a very convenient air purification technology.
2. Application in medical wastewater. With the rapid development of the pharmaceutical industry, while bringing huge economic benefits, the environmental pollution caused by its discharged wastewater is also increasing. Pharmaceutical wastewater has high concentration of organic matter, poor biodegradability, deep color, complex composition, and contains pollutants such as petroleum, amines, acids, demulsifiers, etc., belongs to difficult-to-degrade organic wastewater, and brings unpredictable impacts on the ecosystem. harm. Therefore, in recent years, there have been more and more researches on the degradation of organic pollutants through photocatalytic oxidation at home and abroad.

3. Application in wastewater treatment. In 1985, Wenxuezhu and others first reported an experiment using WO3 as a photocatalyst to treat printing and dyeing wastewater. The results showed that when visible light is irradiated to the semiconductor powder suspended in an aqueous solution, the dye is decomposed into CO2, H2O, N2, etc., thereby reducing COD and chromaticity.

SAT NANO is the earliest domestic manufacturer of large-scale industrial production of nanomaterials. It has been able to stably provide nano-tungsten oxide powder and dispersion products. Nano-tungsten trioxide is made by hydrothermal method, with fine particle size, high purity, and large ratio. On the surface, nano-tungsten trioxide has the ability to absorb electromagnetic waves, and can be used as an excellent solar energy absorbing material, invisible material and photocatalysis field. Welcome new and old customers to consult!