| abstract |
A photocatalyst composition comprises a photocatalyst selected from titanium dioxide, zinc oxide, tungsten oxide, tin oxide, strontium titanate, bismuth oxide, iron oxide, metallic complexes, silver, or a mixture thereof. Ideally titanium dioxide is used. The photocatalyst is formed as a layer with a substrate. Ideally the catalyst is mixed with a binding agent (preferably silica which is formed by the hydrolysis of a tetra-alkoxysilane such as tetra-ethoxysilane). Electron spin resonance properties of the catalysts are disclosed and the catalyst respond to UV radiation. |