Photocatalytic TiO2 nanosheets-SiO2 coatings on concrete and limestone: An enhancement of de-polluting and self-cleaning properties by nanoparticle design

In this study, we develop TiO2-SiO2 nanocomposites that can be employed as photoactive coatings to create surfaces with antipollution and self-cleaning properties in urban buildings. particular, anatase titanium dioxide a high percentage of {0 0 1} facets, commonly called titania nanosheet (TNS), was used active phase. This approach allows us improve the similar sols based on P25. The obtained TNS were intensively characterized by UV–Vis diffuse reflectance absorption, X-Ray diffraction transmission electron microscopy rationalize sol synthesis fully understand photocatalytic performances. Our results clearly show after treating nanosheets NaOH remove adsorbed residual fluoride from synthesis, they easily dispersed activity is dramatically improved. material has been shown effectively reduce concentrations NOx, soot organic dyes under simulated sun light radiation.