Infrared and Near-Infrared Spectrometry of Anatase and Rutile Particles Bandgap Excited in Liquid.

ABSTRACT: Chemical conversion of materials is completed in milliseconds or seconds by assembling atoms over semiconductor photocatalysts. Bandgap-excited electrons and holes reactive on this time scale are key to efficient atom assembly to yield the desired products. In this study, attenuated total reflection of infrared and near-infrared light was applied to characterize and quantify the electronic absorption of TiO₂ photocatalysts excited in liquid. Nanoparticles of rutile or anatase were placed on a diamond prism, covered with liquid, and irradiated by steady UV light through the prism. Electrons excited in rutile particles (JRC-TIO-6) formed small polarons characterized by a symmetric absorption band spread over 10000-700 cm^-1 with a maximum at 6000 cm^-1. Electro

SUBMITTER: Fu Z 

PROVIDER: S-EPMC9841978 | biostudies-literature | 2023 Jan

REPOSITORIES: biostudies-literature