Abstract
This study explores the depollution activity of a photocatalytic cementitious composite comprising various compositions of n-TiO(2) and CaCO(3). The photocatalytic activity of the CaCO(3)-TiO(2) composite material is assessed for the aqueous photodegradation efficiency of MB dye solution and NO(x) under UV light exposure. The catalyst CaCO(3)-TiO(2) exhibits the importance of an optimal balance between CaCO(3) and n-TiO(2) for the highest NO(x) removal of 60% and MB dye removal of 74.6%. The observed trends in the photodegradation of NO(x) removal efficiencies suggest a complex interplay between CaCO(3) and TiO(2) content in the CaCO(3)-n-TiO(2) composite catalysts. This pollutant removal efficiency is attributed to the synergistic effect between CaCO(3) and n-TiO(2,) where a higher percentage of n-TiO(2) appeared to enhance the photocatalytic activity. It is recommended that CaCO(3)-TiO(2) photocatalysts are effectiveness in water and air purification, as well as for being cost-effective construction materials.