titanioksidi

Titanioksidi, also known as titanium dioxide, is a naturally occurring oxide of titanium. Its chemical formula is TiO2. It is a white, powdery solid that is insoluble in water. Titanium dioxide is the most widely produced pigment in the world, valued for its exceptional brightness and high refractive index. This makes it an effective opacifier, meaning it can make other substances appear opaque or white.

The primary applications of titanioksidi are as a white pigment in paints, coatings, plastics, and paper. Its ability to scatter light contributes to the whiteness and brightness of these products. It is also used in sunscreens and cosmetics due to its ability to absorb and reflect ultraviolet (UV) radiation, providing protection against sunburn and long-term skin damage. In the food industry, it can be used as a food coloring agent, typically labeled as E171, to provide whiteness and opacity to various products.

Beyond its pigmentary and UV-blocking properties, titanioksidi exhibits photocatalytic activity. Under UV light, it can break down organic matter and pollutants. This property is exploited in self-cleaning surfaces, air and water purification systems, and even in some deodorizing applications. Titanium dioxide exists in several crystalline forms, including rutile, anatase, and brookite, with rutile and anatase being the most commercially significant. The specific crystal structure can influence its properties, such as its refractive index and photocatalytic efficiency.