fig9

Figure 9. (A) Schematic of the hydrothermal synthesis of TiO₂ and ZT on FTO, and fabrication of the metal oxide-coated ZT/FTO heterostructured photoanode; (B) SEM images of the surface view of SZT thin films; (C) SEM images of cross-section of SZT thin films; (D) Schematic of charge transfer mechanism in metal oxide coated ZT photoanode; (E) Evolution of H₂ and photocurrent density as a function of time measured at 0.1V vs. Ag/AgCl using SZT as a photoelectrode under 100 mW/cm² light illumination in a three-electrode configuration, Inset shows a schematic of the PEC hydrogen generation^[20]. Copyright 2016, Elsevier. ZT: ZIS/TiO₂; ZIS: ZnIn₂S₄; FTO: fluorine-doped tin oxide; SZT: SiO₂-treated ZT; SEM: scanning electron microscope.