how does semiconductor work in photodegradation process? what is the mechanism behind here? what is the purpose of semiconductor used? why we used semicondu for photodegradation? which type of elemnts should have better activity?
The role of a semiconductor is to activate the O2 and to oxidate the water to produce reactive oxygen species (ROS) responsible for the oxidation of organic matter. It happens because when a semiconductor is irradiated with an appropriate light source electrons from the valence band are promoted to the conduction band generating e-/h+ pairs. The most used semiconductor is TiO2 because of its multiple features but even that, there are many others that can be also used and it depends in different parameters such as band gap, band structure, and so on
Semiconductor works by Advance oxidation process. Upon incident of light it generates the hole and electron which react with dye and degrade it
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