Titanium dioxide derived materials with superwettability

Titanium dioxide (TiO₂) is widely used in various fields both in daily life and industry owing to its excellent photoelectric properties and its induced superwettability. Over the past several decades, various methods have been reported to improve the wettability of TiO₂ and plenty of practical applications have been developed. The TiO₂-derived materials with different morphologies display a variety of functions including photocatalysis, self-cleaning, oil-water separation, etc. Herein, various functions and applications of TiO₂ with superwettability are summarized and described in different sections. First, a brief introduction about the discovery of photoelectrodes made of TiO₂ is revealed. The ultra-fast spreading behaviors on TiO₂ are shown in the part of ultra-fast spreading with superwettability. The part of controllable wettability introduces the controllable wettability of TiO₂-derived materials and their related applications. Recent developments of interfacial pho-tocatalysis and photoelectrochemical reactions with TiO₂ are presented in the part of interfacial photocatalysis and photoelectrochemical reactions. The part of nanochannels for ion rectification describes ion transportation in nanochannels based on TiO₂-derived materials. In the final section, a brief conclusion and a future outlook based on the superwettability of TiO₂ are shown.