Porous titanium dioxide doped with Ag and Fe prepared by plasma electrolytic oxidation. Photocatalytic enhancement of Cr(VI) reduction

TRAID, H.D.; VERA, M.L.; ZAMPIERI, G.E.; LITTER, M.I.

Buenos Aires

Congreso; 11th World Congress of Chemical Engineering; 2023

Asociación Argentina de Ingenieros Químicos

To avoid the expensive recovery step of suspended TiO2 in heterogeneous photocatalysis, the immobilization of the photocatalyst is necessary. The anodic oxidation of titanium by plasma electrolytic oxidation (PEO) technique is one of the simplest and cheapest methods of synthesis of TiO2 coatings, leading to porous and crystalline materials, capable of reducing Cr(VI) through the very well-known TiO2 photocatalytic mechanism. Moreover, the doping could improve the photocatalyst efficiency. The present work assesses the influence of Ag and Fe addition to the electrolyte used in the synthesis of porous TiO2 by PEO on the photocatalytic reduction of Cr(VI) in the presence of ethylenediaminetetraacetic acid (EDTA) as a synergetic agent.