ABSTRACT
Historic concrete buildings are usually exposed to a wide range of contaminants, such as particulate matter and other components like organic and elemental carbon, and nitrogen oxides; which lead to aesthetical and structural damages. A promising approach to mitigate the deleterious effects of these contaminants is the application of photocatalytic self-cleaning treatments, such as TiO2-based products. In the present work we investigate the photocatalytic performance under visible light of coatings containing TiO2 modified by gold nanoparticles on concrete samples. The treatments were effective for the degradation of the dye methylene blue and for soot.
