8 - Photocatalytic ceramic coatings

Abstract

Ceramics are an elite class of materials known for their mechanical strength, corrosionresistance, and heat resistance. In modern engineering and technology, ceramic-coated surfaces find a special place in refractories, biomedical implants, catalysis, and advanced structural materials. In particular, a rapid progression is observed in the applications of metal oxide-based ceramic coatings as photocatalytic systems in energy and environment-related sectors. Photocatalysis initiates with the absorption of light and its subsequent accelerated photoreaction with the catalyst to generate highly reactive hydroxyl radicals. The present chapter gives an overview of the recent advancements in TiO2-based photocatalytic coatings on ceramic tiles with special emphasis on their decomposition power, superhydrophilicity (self-cleaning), and antifouling technology. As the manufacturing of photocatalytic ceramic surfaces still remains a challenge, the present work compares the various methods to coat the ceramic tiles and the impact of the deposition technique on the degree of adhesion, coating thickness, and roughness. The deposition technique also influences the color and brightness of the ceramic surface, altering the tile’s appearance. In terms of future perspectives, sunshine-activated self-cleaning technology developed for sustainable, eco-friendly building wellness is also provided.