In the July 13, 2001, issue of Science, researchers from Japan reported that titanium dioxide films doped with nitrogen ions degraded organic compounds in the presence of visible light. Visible light-activated titanium dioxide has a wide range of applications, which include sewage help with essays treatment, coatings for self-cleaning cars and windows, and uses in hospitals and bathrooms.
The United States produces 1.5 million tons of titanium dioxide each year, used primarily as a white pigment in sunscreen and paint. When exposed to ultraviolet light, titanium dioxide can also break down dirt and pollution, kill bacteria, and prevent the development of fog-forming water droplets. help with your essay However, only 5 percent of natural and indoor light (visible light) is composed of ultraviolet (UV) wavelengths; thus the beneficial properties of titanium dioxide can only be activated by exposure to a UV lamp. For years, researchers have been experimenting with novel forms of the compound that are activated by visible wavelengths. Much prior research was focused on metal-enhanced titanium dioxide. However, nitrogen-supplemented titanium dioxide coatings are more stable and cheaper to produce than metal coatings.
Potential applications of visible light activated titanium dioxide are numerous. For example, nitrogen-enhanced titanium dioxide bonds to water so tightly that fog-forming droplets are flattened. As a result, coatings could be used to create fogless bathroom or car mirrors. Currently, a group of researchers is testing whether a film of nitrogen-supplemented titanium dioxide used to coat military vehicles can break down biological weapons as the vehicles sit in the Sun.