This review paper summarises recent work on the TiO2 photocatalytic oxidation of phenol, for the application of heterogeneous photocatalysis in water purification processes. In recent years, the application of heterogeneous photocatalytic water purification processes has gained wide attention due to their effectiveness in degrading and mineralising recalcitrant organic compounds. Furthermore, it may be possible to utilise the solar UV and visible-light spectrum. Titania (TiO2) has played a much larger role in this scenario compared to other semiconductor photocatalysts due to its cost-effectiveness, inert nature, and photostability. A substantial amount of research has focused on the enhancement of TiO2 photocatalysis by modification with metal, non-metal, and ion doping. In this paper Polish researchers review and summarise recent work on the titanium dioxide (TiO2) photocatalytic oxidation of phenol. They also discuss various mechanisms of phenol photodegradation – indicating the intermediate products – and formation of OH radicals. The phenol degradation pathways in both systems, TiO2/UV and doped-TiO2/Vis, are described. Source: filtsep
Source:
http://workingwithwater.filtsep.com/view/29147/phenol-photodegradation-mechanisms-in-the-presence-of-pure-and-modified-tio2/
