"Photoinduced self-cleaning and antimicrobial properties are observed for fabrics modified with photocatalysts, especially with TiO2 of structure because it is the most active and stable photocatalyst for oxidative degradation in oxygen-contained medium... TiO2 is commonly used in other photocatalytic processes, including photocatalytic hydrogen production... CO2 reduction... and photoelectrochemical conversion... Nanocrystalline TiO2 can be anchored on the external surface of nonporous and porous supports (e.g., glasses... adsorbents... polymeric fibers... and fabrics... to prepare composites with enhanced properties or functional materials."