**4. Conclusions**

The present chapter fully addresses the main objectives of water purification by using a triple-phase catalyst. Under irradiation, charge carriers are formed on the surface of the photocatalyst, and the success of pollutant molecule degradation critically depends on the interaction between the surface and the target molecules. Therefore, the organic pollutant degradation efficiency strongly depends on the fabrication method as it drives the shape and size of the photocatalyst and its hydrophobic or hydrophilic characteristics. Compared with state-of-the-art diphasic photocatalytic systems, for which the limited concentration and diffusion rate of oxygen reduces the degradation efficiency, the novel triphasic photocatalytic system with superhydrophobic triphasic interface architecture will allow the rapid delivery of oxygen directly from the air to the reaction interface, thus minimizing electron-hole recombination and resulting in remarkably high efficiency. Recently, a solid surface's superwettability (especially underwater superoleophobicity) has attracted much attention owing to its importance for photocatalytic. Although this is new research, it is rapidly growing and promising in future research, which enormously extends the research field of superior wettability to the triphasic system. Therefore, the surface wettability of a photocatalyst film in the liquid-liquid-solid system should also be an exciting research focus shortly.

*A Triphasic Superwetting Catalyst for Photocatalytic Wastewater Treatment DOI: http://dx.doi.org/10.5772/intechopen.109509*
