Functionalization of glass by TiO2-based self-cleaning coatings

Abstract This chapter covers the main applications of TiO2 as self-cleaning material for functionalized glass. The chapter starts with the basic principles of self-cleaning, a peculiar ability of TiO2-based coatings that rely on their photocatalytic properties and photoinduced hydrophilicity to keep the glass surface clean. Afterward, the chapter reviews the main self-cleaning glasses currently available on the market, pointing out the main features and advantages of each commercial product. Doping strategies used to improve the performance of TiO2 are also covered in order to support the development of more efficient visible-light active coatings which would further support the spread of this technology. Finally, promising research paths for improved glass multifunctionality are also discussed, focusing on the potential advantages deriving from the combination of TiO2 with other materials to form layered structures able to simultaneously ensure self-cleaning, antireflective, and energy-saving properties.