A BBC news article on Titanium dioxide brought to my attention the amazing air cleaning properties of this increasingly popular chemical. Apparently TiO2 has the ability to release free electrons on being subjected to ultraviolet rays in sunlight, which in turn helps disintegrate oxides of nitrogen and certain other volatile organic compounds that otherwise connive with smoke to create that hated trademark urban pollutant - smog. This property of TiO2 is now being thoroughly analyzed in laboratories around the world, and the industry has already started using it in making environment friendly building materials. The said article talks about a few construction projects that has been or is planning to use TiO2 coated components, that could end up being active air purifiers.
To read the original article, go to the following link:
http://www.bbc.co.uk/news/science-environment-15694973
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