Photophysical Characterization of Ru Nanoclusters on Nanostructured TiO₂ by Time-Resolved Photoluminescence Spectroscopy.

ABSTRACT: Despite the promising performance of Ru nanoparticles or nanoclusters on nanostructured TiO₂ in photocatalytic and photothermal reactions, a mechanistic understanding of the photophysics is limited. The aim of this study is to uncover the nature of light-induced processes in Ru/TiO₂ and the role of UV versus visible excitation by time-resolved photoluminescence (PL) spectroscopy. The PL at a 267 nm excitation is predominantly due to TiO₂, with a minor contribution of the Ru nanoclusters. Relative to TiO₂, the PL of Ru/TiO₂ following a 267 nm excitation is significantly blue-shifted, and the bathochromic shift with time is smaller. We show by global analysis of the spectrotemporal PL behavior that for both TiO₂ and Ru/TiO

SUBMITTER: Wenderich K 

PROVIDER: S-EPMC10388344 | biostudies-literature | 2023 Jul

REPOSITORIES: biostudies-literature