Photocatalytic and Sonocatalytic Degradation of EDTA and Rhodamine B over Ti0 and Ti@TiO2 Nanoparticles

Herein, we report a comparative study of photocatalytic (Xe-lamp) and sonocatalytic (345 kHz power ultrasound) degradation Ethylenediaminetetraacetic acid (EDTA) Rhodamine B (RhB) in the presence Ti0 Ti@TiO2 core-shell nanoparticles (NPs). NPs have been obtained by sonohydrothermal treatment (20 kHz, 200 °C) commercially available pure water. The material is composed quasi-spherical particles (30–150 nm) coated 5–15 nm crystals anatase. In contrast to pristine TiO2, exhibit extend photo response from UV NIR light region due absorption nonplasmonic Ti core. EDTA can be oxidized effectively photocatalysis NPs. By contrast, air passivated was found inactive process for both RhB. Photocatalytic over exhibits strong photothermal effect, which has attributed higher yield oxidizing radicals produced at bulk temperature. efficiency RhB depends strongly on concentration. At [RhB] ? 1 × 10?3 M, its not feasible self-absorption. lower concentrations, observed, but compared EDTA. We that efficient sonochemical does require any catalysts. For processes, RhB, processes are more effective Ar/O2 gas mixture Ar. results suggest choice optimal technology organic pollutants determined their optical complexing properties.