Photocatalytic Mechanism of TiO2-Based Photoanode: A Visual Guide

Figure 1-1: Photocatalytic mechanism of the photoanode using TiO2 as a model. This figure provides a visual representation of the key steps involved in the photocatalytic process. When TiO2 absorbs light energy, electrons are excited from the valence band to the conduction band, leaving behind holes in the valence band. These excited electrons and holes can then participate in redox reactions, enabling the conversion of light energy into chemical energy. The mechanism highlights the crucial role of TiO2 in facilitating the generation of electron-hole pairs and driving the photocatalytic reaction.