Nano TiO2 properties and photocatalytic properties Nano titanium dioxide has the characteristics of small size effect, high specific surface effect and high chemical activity of nano materials, and has high photocatalytic performance. Nano titanium dioxide is popular for its advantages such as low price, suitable forbidden band width, large specific surface area, high chemical stability, strong redox ability, no secondary pollution and reusability. The photocatalytic properties of titanium dioxide are determined by its special energy band structure. Under the action of ultraviolet light, the valence band electrons of titanium dioxide are excited to the conduction band to produce highly active electrons—hole pairs, which can be captured by different points after being transferred to the surface of the body. The oxygen and water in the air are activated to generate active oxygen free radicals (0j-) and (on.) free radicals 121,0 and react with H+ to generate H02- f...
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