Work

Design, Building and Performance of a New Photocatalytic Reactor Using TiO2-Coated Rings Synthesized by Plasma Electrolytic Oxidation

Year: 2025

Type: article

Abstract: An annular UV photocatalytic reactor with recirculation in batch was designed and built. The design considered low construction, simple operation and maintenance costs, availability and durability of the materials used, easy cleaning, and high standards of hygiene and safety. The TiO2 photocatalysts were synthesized by plasma electrolytic oxidation (PEO) on commercial Ti rings were compared with coatings obtained on Ti plates as a reference, and no influence of the substrate geometry on the morphology, crystallinity, or bandgap of the coatings was observed. The efficiency of the photocatalytic reactor using 10 TiO2-coated rings was tested by Cr(VI) transformation in the presence of EDTA. The Cr(VI) transformation after 5 h irradiation attained 95%; a rather high photocatalytic activity (62%) was maintained after the third use of the rings without reactivation of the photocatalyst. These coatings synthesized by PEO have not been applied in modular photocatalytic reactors until now.

Source: Photocatalysis: research and potential

DOI: 10.70322/prp.2025.10011

Authors: Hern醤 Dar韔 Traid, Mar韆 Laura Vera, Alexander Emanuel Kurtz, Anabela Natalia Dwojak, Marta Irene Litter

Institutions: Consejo Nacional de Investigaciones Científicas y Técnicas, National University of Misiones, National University of General San Martín

Language: English

Topic: TiO2 Photocatalysis and Solar Cells

Subfield: Renewable Energy, Sustainability and the Environment

Field: Energy

Domain: Physical Sciences

SDGs: Clean water and sanitation, Affordable and clean energy, Responsible consumption and production

Open Access status: hybrid

Funders: Universidad de Buenos Aires, Agencia Nacional de Promoción de la Investigación, el Desarrollo Tecnológico y la Innovación