Basic overview of nano zinc oxide?
The white hexagonal crystal or spherical particles of nano zinc oxide are also found to have a particle size of less than 100nm, an average particle size of 50nm, and a specific surface area of more than 4 ㎡/g. Therefore, it will now have high chemical activity, excellent catalytic and photocatalytic activity, and have anti infrared, ultraviolet radiation and bactericidal functions. Good liquidity.
Nanometer zinc oxide is usually used as a catalytic material, a photochemical semiconductor material, which can catalyze the photolysis of organic molecules. 10~25nm ZnO can be used for the catalytic photolysis of phenol, and can also be used as a catalyst for the direct synthesis of methanol from CO hydrogenation. Of course, compared with ordinary ZnO, it can significantly improve CO conversion and methanol recovery. It is used to manufacture fibers with anti ultraviolet and anti infrared radiation functions, and to manufacture synthetic rubber and coatings. Later, we will see that nano zinc oxide is a new type of multifunctional inorganic material, and its particle size is about 1~100 nm. Due to the grain refinement, the electronic structure and crystal structure of the surface change, resulting in surface effect, volume effect, quantum size effect and macro tunnel effect, as well as the high transparency and high dispersion that macro objects do not have, which will naturally produce characteristics. Therefore, in recent years, it has been found that nano zinc oxide has many special functions in catalysis, optics, magnetism, mechanics, etc. It will also be used in ceramics, chemical industry, electronics, optics, biology, medicine, etc. It has special characteristics and uses that ordinary zinc oxide cannot match.
In addition, nano zinc oxide can also be used as ultraviolet shielding materials, antibacterial agents, fluorescent materials, photocatalytic materials, etc. in the field of textiles and coatings. Of course, this is mainly due to a series of excellent properties and attractive application prospects of nano zinc oxide, so the research and development of nano zinc oxide has become the focus of many scientific and technological personnel. It can be seen that nano zinc oxide can be used in many industries. Moreover, its essence is the electronic structure of semiconductor catalyst. Under light irradiation, when photons with a certain energy or photons larger than the semiconductor band gap energy Eg are injected into the semiconductor, electrons are excited from the valence band VB to the conduction band CB, leaving holes. In general, some excited conduction band electrons and valence band holes can be combined to eliminate the input energy and heat. The electrons are captured in the surface state of the material, the valence electrons jump to the conduction band, and the valence band holes turn to the hydroxyl electrons in the surrounding environment, which are snatched and turned into free radicals to act as strong oxidants, complete the degradation of organic substances (or chlorine containing), and kill bacteria and viruses.
After the introduction of the above contents, we also know the basic overview of nano zinc oxide. I hope you can have a further understanding of it after reading it. If you need it, please feel free to contact us. I will tell you about its advantages next time.