Structure–Property–Performance Relationships of Dielectric Cu₂O Nanoparticles for Mie Resonance-Enhanced Dye Sensitization

A dye-sensitized photocatalytic (DSP) approach is considered as one of the promising approaches for developing visible light- and near-infrared light-responsive photocatalysts. DSP systems are still affected by significant drawbacks, such low light absorption efficiency. Recently, it has been demonstrated that plasmonic metal nanostructures can be used to enhance efficiency overall dye-sensitization rate through Mie resonance-enhanced approach. In this contribution, we report an alternate novel approach, dielectric dye sensitization. Specifically, demonstrate resonances in cuprous oxide (Cu2O) spherical cubical methylene blue dye. The Cu2O exhibiting exhibit up 1 order magnitude higher compared not resonances. Our model system developed from finite-difference time-domain simulation predicts a volcano-type relationship between size nanostructures. predicted structure–property–performance experimentally verified, optimal ranges nanospheres nanocubes identified. Although using nanostructures, proposed design wide range systems, including CeO2, ?-Fe2O3, TiO2 nanostructure-based systems.