Development of TiO-CaCO Based Composites as an Affordable Building Material for the Photocatalytic Abatement of Hazardous NO from the Environment.

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