Influence of co-existing alcohol on charge transfer of H(2) evolution under visible light with dye-sensitized nanocrystalline TiO(2)

The dye-sensitized nanocrystalline TiO(2) colloidal suspension in aqueous systems has been applied for H(2) evolution in the photocatalytic water splitting under visible irradiation. We have reported that the conversion efficiency is strongly influenced by the combination of dye-sensitizers and co-existing species in the suspension system. We herein analyze the fluorescence quenching of the dye-sensitized TiO(2) nanoparticles in the suspensions and photoelectrochemical properties of dye-sensitized nanoporous TiO(2) films. The combination of dye-sensitizers and co-existing species dominates the charge recombination resulting in significant differences in the efficiencies of the proton reduction into H(2).