ثنائي أكسيد النيتروجين
Photocatalysis is initiated by titanium dioxide (TiO2), which is added during the cement’s production. Typical properties (i.e. strength) of cement applications (such as concrete) will be added to clean the air around the photocatalytic surface. Nitrogen dioxide (NO2) will be particularly abated when daylight activates the photocatalytic surfaces.