Title
A Systematic Study on the Double-Layered Photosensitizing Dye Structure on the Surface of Pt-Cocatalyst-Loaded TiO2 Nanoparticles
Author
Nobutaka Yoshimura, Atsushi Kobayashi, Masaki Yoshida, Masako Kato
Year
2019
Journal
Bulletin of the Chemical Society of Japan
Abstract
We have systematically prepared three kinds of photosensitizing (PS) double layers on the surface of Pt-cocatalyst-loaded TiO2 (Pt-TiO2) nanoparticles by using four different phosphonate-functionalized Ru(II) polypyridine photosensitizers (Ru) and Zr4+ cation linkers to improve the photo-induced separation efficiency at the double-PS-layer and semiconductor interface. All three nanoparticles with double-PS-layer structure (Ru-Zr-Ru@Pt-TiO2) exhibited remarkably higher photocatalytic H2 evolution activity than that of single-PS-layer nanoparticles, Ru@Pt-TiO2 in low sacrificial electron donating (SED) l-ascorbic acid solution. The fine-tuning of emission energy of Ru(II) PS dye at the outer surface of Ru-Zr-Ru@Pt-TiO2 nanoparticle revealed that photoexcitation energy transfer from outer to inner Ru(II) PS dyes give a positive effect on the photocatalytic activity especially in the low SED concentration.
Instrument
FP-8600
Keywords
Fluorescence, Photophysical properties, Coordination chemistry, Nanostructures, Materials