Use of Photocatalyst in Self-Cleaning Constructions Material: A Review

Abstract

Pollution arising from the urban activities and industry has a significant impact on the aesthetic view of building and quality of life. This study reviews the framework, problem, challenges, and benefits of self-cleaning construction materials. The present study gives the critical review analysis of the relevant literatures considering the self-cleaning concrete properties, process, and critical assessment of different approaches of self-concrete techniques. Recently, studies based on self-cleaning concrete have provided alternative for traditional concrete. Specifically, use of “Photocatalyst” as a self-cleaning” agent has revolutionized the concrete industry. The self-cleaning properties of photocatalyst, e.g., TiO2, Bismuth, and ZnO have been investigated and compared. These photocatalysts activated by ultraviolet (UV) radiation can result in increased organic particulates decomposition. They check the level of pollutants like NOx, SO2, and Volatile Organic Compound and keep the air pollution free. It is concluded that Bismuth (Bi2O2CO3) photocatalyst gives better result in self-cleaning than TiO2 and ZnO.