Photocatalytic nano-titanium dioxide sterilization mechanism

Photocatalyzed nano-tio2 products have strong photocatalytic bactericidal effect. Through the comparison of the lethal curve of nano TiO2 photocatalysis killing Gram negative and positive bacteria, routine culture verification and transmission electron microscope observation, the conclusion is drawn: Nano TiO2 photocatalytic sterilization first starts from the bacterial cell wall, and the free radicals generated by it can destroy the cell wall structure, causing the cell wall to break and damage, and the plasma membrane to disintegrate, and then enter the cell body to destroy the inner membrane and cell components, causing the cytoplasm to condense, resulting in the overflow of cell contents, and the cell body cavitation phenomenon. Thus, it is confirmed that the bacteriostatic mechanism of nano-tio2 is that under the action of photocatalysis, the electrons in the forbidden band of nano-tio2 transition from valence band to conduction band, forming highly active electron-hole pairs on the surface, and further forming ·OHˉ, ·O2ˉ, ·OOHˉ destroy bacterial cells through a series of physical and chemical actions, thereby killing bacteria.

Ningbo Jiweina New Material Technology Co., Ltd. is a professional technology research and development and production promotion enterprise of water-soluble monodisperse nano titanium dioxide, air purification net, photocatalyst, dissolved enzyme, odor removal, haze removal and other air treatment products, with a complete and scientific quality management system. The company is located in Ningbo Cixi Binhai Economic Development Zone, which is the ninth batch of "Shanglin talents" introduced enterprises in Cixi City, and is a high-tech enterprise specializing in the development, production, sales and application of nano new materials. The company has developed the large-scale preparation technology of effluent phase monodisperse and highly active nano titanium dioxide powder at home and abroad, which solves the technical problems that nanomaterials are expensive and cannot be dispersed. The company innovatively developed low-temperature in-situ growth technology, which loaded a layer of dense, firm, non-shedding high-activity nano titanium dioxide photocatalyst on the surface of non-temperature resistant materials such as fibers and fabrics, expanded the application field and application effect of photocatalytic oxidation technology, and had a major breakthrough in technology and application; At the same time, the company has also developed a number of excellent performance of air treatment products and reserves a large number of photocatalytic oxidation technology, widely used in air treatment, water purification, disinfection, ink coating, skin care, self-cleaning, food manufacturing, medical and other industries. In addition, the company has established good cooperative relations with Peking University, University of Science and Technology of China, University of Chinese Academy of Sciences, University of Tokyo and other domestic and foreign universities to ensure the company's scientific and technological properties in materials science, nanotechnology and environmental governance industries, and contribute to the development of green technology materials industry. The integrity, strength and product quality of Ningbo Jiweina New Material Technology Co., Ltd. are recognized by the industry. Welcome friends from all walks of life to visit, guidance and business negotiations.