The use of photocatalytic products for the surface coating of buildings is spreading more and more, because ofthe reduction of atmospheric pollutants and the colour maintenance of the paints over time with reduction of themaintenance costs and the improvement of the aesthetic appearance. The study reports the evaluation of theeffects of the atmospheric conditions on three commercial photocatalytic paints containing TiO2. In particulartests were carried out by using samples subjected to accelerated aging inside a climate chamber and naturallyaged by exposure for two years to the external environment of the city of Palermo (representative of a coastalenvironment of the Mediterranean basin). The samples were characterized by Scanning Electron Microscopy(SEM) and Optical Microscopy to evaluate the surface morphology, and by UV–Vis Spectrophotometry to appreciatethe colours changes as a result of aging. X-ray diffraction (XRD), moreover, was used to identify the TiO2phase and static contact angles were determined to evaluate the surface hydrophilicity. The photocatalytic activitywas evaluated under UV and solar light irradiation by degrading 2-propanol, used as a probe molecule andanalysed by gas chromatography (GC), which is representative of volatile organic compounds (VOC's). Theresults indicated colour conservation, increase of the surface hydrophilicity and maintenance of the photocatalyticperformances.
|Numero di pagine||10|
|Rivista||CEMENT & CONCRETE COMPOSITES|
|Stato di pubblicazione||Published - 2019|
All Science Journal Classification (ASJC) codes
- Building and Construction