fig21

Figure 21. (A) Formation of H₂O₂ over WO₃ and Pt/WO₃ under visible-light excitation. (B) ESR spectra of DMPO-OH• adducts in an aqueous dispersion of Pt/WO₃ and WO₃^[267]. (C) Bandgap structure of WO₃ and Ga₂O₃^[265]. (D) The photocatalytic acetone oxidation over In (OH)₃s treated at various temperatures: (a) 60 °C; (b) 120 °C; (c) 160 °C; (d) 200 °C; and (e) 250 °C. (f) P25 was adopted as a reference^[268]. This figure is used with permission from the American Physical Society.