Solar Hydrogen Production Coupled with the Degradation of a Dye Pollutant Using TiO₂ Modified with Platinum and Nafion

Scheme 1

Schematic illustration of the simultaneous production of H₂ and degradation of RhB occurring on Pt/TiO₂/Nf. (1) excitation of RhB, (2) electron transfer from excited RhB to TiO₂ CB with RhB^•+ generation, (3) electron transfer from TiO₂ CB to Pt nanoparticles, (4) reduction of protons (H₂ production), (6) electron transfer from TiO₂ CB to RhB^•+ (charge recombination) with RhB regeneration, (7) electron transfer from EDTA to RhB^•+ with EDTA^•+ generation and RhB regeneration, and (8) reaction between RhB^•+ and EDTA^•+ (-deethylation of RhB). The number in parentheses indicates the number of reactions in the text.