detailed description:
Nano-titanium dioxide (TiO2) as a novel photocatalyst, UV agents, the photoelectric effect and the like, with its fantastic features, antibacterial mildew in the exhaust gas purification, deodorization, water treatment, pollution, weather aging, car paint and other areas show broad application prospects. With the industrial production of its products and functional application development matures, it is in the environment, information, materials, energy, medical and health fields technological revolution will play the role can not be underestimated.
Antibacterial antifungal mechanism of nano-titanium dioxide
Electronic structure of TiO2 has the characteristics of their light generated by a strong chemical reactivity of superoxide anion radicals and hydroxyl radicals attack organic matter, to degrade organic pollutants role. When confronted with the bacteria, the bacterial cells directly attack, resulting in the degradation of organic matter within the bacterial cells, thereby killing the bacteria and make it decompose. Fungicides commonly used silver, copper and other bacterial cells can lose their activity, but after killing the bacteria, the body release of endotoxin and other harmful components. Nano-titanium dioxide can affect not only the fecundity of bacteria, and can destroy the bacterial cell membrane structure, to achieve complete degradation of bacteria and prevent secondary pollution caused by endotoxin, nano-titanium dioxide is non-leaching materials, the degradation of organic pollutants and kill sterilized at the same time , itself does not decompose dissolution, photocatalysis durable and lasting sterilization, degradation of pollutants results.
As nano-materials, in addition to meeting the requirements of nanometer size, it also must have the functionality and applicability. TiO2 nano-scale distribution reach can fully reflect the quantum size effect, surface effect, volume effect and macroscopic quantum tunneling effect, it has a series of special nanoparticles application characteristics, such as antibacterial, air purification, sewage purification.
Nano-titanium dioxide applications
In people's living environment, there are a variety of harmful bacteria have a negative impact on human life. Variety of indoor decorative building materials, such as plywood, wood laminate flooring, laminated wood panels furniture and adhesives will be issued formaldehyde, halogenated hydrocarbons, aromatic hydrocarbons and other toxic pollutants harmful to human health. If the building interior paint, floor covering, wall decoration materials, furniture paint and other materials in Tim Runa Mi titanium dioxide, both sterilization mildew, but also degradation of organic pollutants, so that people living in the health healthy environment.
Also, add about 1% titanium dioxide antibacterial plastic, can be widely used in food packaging, appliances, furniture, tableware, public facilities, etc., in order to prevent the propagation of bacteria and cross-infection. Antibacterial fiber can produce medical supplies, etc., can also produce antibacterial deodorant care textiles, hygiene textiles, etc., in order to provide safe and effective health care.
TiO2 photocatalytic process is simple, low cost, use of natural light, temperature and pressure can be catalytic decomposition of bacteria and pollutants, with high activity, no secondary pollution, no irritation, safe non-toxic, chemical stability and thermal stability good features, is the most developed one promising green catalysts. Nano TiO2 photocatalyst treatment of organic wastewater, to be effective in the water halogenated aliphatic hydrocarbons, halogenated aromatic hydrocarbons, nitro aromatics, polycyclic aromatic hydrocarbons, phenols, dyes, pesticides, etc. in addition to drugs, bleaching, mineralization, and ultimately degrade to carbon dioxide and water, the current research in this area has progressed, photocatalytic degradation of sewage will become an effective means of disposing.
The use of rutile titanium dioxide excellent UV shielding and high weather resistance, as well as to degrade the photocatalytic effect oxides (NOX), sulfur oxides (SOX), etc., can also be effective in dealing with industrial emissions, vehicle emissions caused by atmospheric pollution, the principle is the organic or inorganic contaminants redox reaction of water, carbon dioxide, salt, so as to purify the air. The results showed that nano-titanium dioxide photocatalytic air purification coatings, ceramics and other materials in the elimination of nitrogen oxides and other aspects of the application has good prospects.
In addition, nano-titanium dioxide in magnetic materials, light conductive materials, gas sensors, humidity sensors and other fields has been very good application. With the application of research, it will become increasingly widespread applications.
