Photocatalysis is a natural phenomenon where a substance, the photocatalytic principle, utilizes light to alter the speed of a chemical reaction; by taking advantage of the energy of the sun, the principle will accelerate the formation of strong oxidizing reagents which results in the decomposition of organic and inorganic pollutants.These pollutants are responsible for gathering on the surface of concrete and walls causing discoloration as well as many health and environmental issues.