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Ultrafine TiO2 acts as a photocatalyst in the presence of ultraviolet light that initiates the reaction with atmospheric pollutants. Some ultrafine TiO2 grades show activity also in the visible spectrum, albeit at a reduced level compared to UV irradiation. Ultrafine TiO2, when suitably incorporated into formulated products, provides a photocatalytic reaction at the surface where the material is incorporated or applied. Depending on the formulation parameters, de-polluting performances (degradation of airborne pollutants such as nitrogen oxides – NOx) and self-cleaning performances (destabilization of the organic components of the particles of dirt sticking on the exposed surfaces) can be achieved. Other additional benefits can also be realized, such as control of mildew and bacterial levels, thanks to optimized formulations and choice of photocatalytic TiO2. Companies, represented by our speakers, supply the active ingredients that can be formulated into or onto various surfaces, such as concrete, building facades, paving blocks, tiles and many others.
The SCI is proud to bring together experts who will explain the exciting possibilities and benefits of photocatalysis for construction both external and internal, specifically -
Self-cleaning properties – The organic interface between the surface and the adsorbed species is broken down. The adsorbed species can then be more easily washed away by rinsing or rain.
Depollution properties – Pollutants and VOCs (Volatile Organic Compounds) are altered once they contact the surface, to form less harmful molecules.
Deodorizing – Toxic and unpleasant odours can be neutralized.