Titanium dioxide, in anatase form, is the most common photocatalyst and presents the following advantages:

• Low cost

• Photocatalytic efficiency

• Non-toxic

Titanium dioxide, also known as titania, is the naturally occurring oxide of titanium, for which the chemical formula is TiO₂. This substance is considered to be safe and harmless to human health and is commonly used in paint, printing inks, plastics, paper, synthetic fibers, rubber, condensers, colors for paints and pastels, ceramics, electronics, foods and cosmetics.

There are many published studies on the use of titanium dioxide as a photocatalyst for the decomposition of organic compounds: as a consequence of exposure to light, titanium dioxide produces Reactive oxygen species (ROS), which react with the organic substances to produce inorganic non-toxic substances.