Photocatalysts in Ceramics

摘要

Advanced oxidation processes (AOPs) are oxidation processes based on sufficient concentrations of hydroxyl radicals to degrade dissolved organic compounds present in water or those that are dispersed in air to mineral forms or at least to harmless organic compounds. It is a safe and clean technology and, in certain processes, solar radiation can be used as process initiator. Titanium oxide is currently the reference as photocatalytic material, given its high activity, relative stability, low cost, and low toxicity. In this study, the use of "ceramic" photocatalysts (ceramic composites) in treatment processes for specific pollutants in urban environments (VOCs and NO_x) and waste waters (persistent, bioaccumulative and toxic (PBT) organic compounds) is analysed, as well as their use "in ceramics" on glazed ceramic tiles as substrates for photocatalytic layers or photo-catalytic glazes.