Figure 2. Scheme of the formation of excitones in TiO2: The incident light (254 nm and 366 nm) produces holes in the valence bond (VB) and electrons in the conducting band (CB). The bandgap of the employed TiO2 modification anatase is about 3.23 eV (= 385 nm)

From

The Analgesic Metamizol (Dipyrone). Part 2: Adsorption, Oxidative and Reductive Degradation

Vithushan Ambalavanar, Achim Habekost

World Journal of Chemical Education. 2018, 6(5), 204-211 doi:10.12691/wjce-6-5-1