RT Journal Article
T1 Novel Fe-Ti nanoparticles synthesized in deep eutectic solvents for enhanced photo-electro-Fenton processes: Synergistic effects and environmental applications
A1 Puga Pazo, Antón
A1 Meijide Fernandez, Jessica
A1 Pazos Currás, Marta María
A1 Sanromán Braga, María Ángeles
A1 Rosales Villanueva, Emilio
K1 3303.01 Tecnología de la Catálisis
AB An innovative titanium-magnetite (Fe-Ti) catalyst was developed using a production strategy based on water-freesolvents such as deep eutectic solvents (DES) for the removal of persistent pollutants. The prepared catalyst wasapplied in electro-Fenton and photo-electro-Fenton processes. To this end, a new cell design with electrodesbased on conductive materials was developed using 3D printing in two different electrochemical cells configurations:vertical electrode configuration (VEC) and horizontal electrode configuration (HEC). The HEC showedgood performance attaining a yield hydrogen peroxide production of 20 mg⋅L1 and being able to operate inelectro-Fenton degradation batch assays for the removal of the drugs (Antipyrine and Lissamine Green B). Then,the heterogeneous bimetallic catalyst (BC-FeTi) was tested and compared with the monometallic Fe catalyst (MCFe).The results with both catalysts showed a synergistic effect combining electrochemical oxidation and Fentonreaction, promoting the best removal of the target pollutants. Subsequently, the contribution of UV radiation wasevaluated with BC-FeTi, achieving that more than 80 % of both pollutants were removed in 80 min by the photo-Fenton process, confirming the high affinity of oxidizing free radicals for high molecular weight organic molecules.Finally, the simultaneous application of electro- and photo-oxidation (photo-electro-Fenton) significantlyimproved the removal of the target contaminants from the aqueous solution, achieving complete removal in 50and 80 min for Lissamine Green B and Antipyrine, respectively. The stability and reusability of BC-FeTi and 3Dprintedelectrodes were achieved in five successive working cycles, with negligible loss of activity compared tonew catalysts, which achieved greater than 99 % removal after five consecutive runs. Leaching of iron and titaniumfrom the catalyst evaluated throughout the cycles, was low, totalling 2.7 and 4.5 % at the end of the fifthcycle.
PB Journal of Molecular Liquids
SN 01677322
YR 2024
FD 2024-05-15
LK http://hdl.handle.net/11093/6750
UL http://hdl.handle.net/11093/6750
LA eng
NO Journal of Molecular Liquids, 402, 124732 (2024)
NO Agencia Estatal de Investigación | Ref. PCI2022-132941
DS Investigo
RD 03-dic-2024