2026-04-17T07:54:46Zhttps://recercat.cat/oai/requestoai:recercat.cat:2445/1529842025-12-04T21:01:44Zcom_2072_1057col_2072_478796col_2072_478917
Microwave-assisted sol-gel synthesis of an Au-TiO2 photoanode for the advanced oxidation of paracetamol as model pharmaceutical pollutant
Hernández, Rafael
Olvera-Rodríguez, Isidoro
Guzmán, Carlos
Medel, Alejandro
Escobar-Alarcón, Luis
Brillas, Enric
Sirés Sadornil, Ignacio
Esquivel Escalante, Karen
Fotocatàlisi
Oxidació electroquímica
Medicaments
Photocatalysis
Electrolytic oxidation
Drugs
An Au-TiO2 photoanode on carbon cloth has been synthesized by microwave-assisted sol-gel method to treat paracetamol solutions at pH 3.0 by photocatalysis (PC), electro-oxidation (EO), photoelectrocatalysis with UVA light (PEC), solar PEC (SPEC) and hybrid methods with photoelectro-Fenton under UVA (PEC+PEF) and sunlight (SPEC+SPEF) irradiation at constant anodic potential (Ean). The photoanode has been characterized by XRD, Raman spectroscopy, HRTEM and SEM-EDS. The counter electrode was a 316L stainless steel plate, which was replaced by an air-diffusion electrode for H2O2 generation in hybrid treatments. The most powerful process was SPEC+SPEF, yielding total paracetamol removal in less than 30 min and 24% mineralization after 180 min, at Ean = +0.82 V. The paracetamol decay followed a pseudo-first-order kinetics in PEC. A lower rate constant was obtained upon increase of pharmaceutical concentration, showing good linear fit using a Langmuir-Hinshelwood model.
2020-03-18T11:42:46Z
2020-09-18T05:10:22Z
2018-09-18
2020-03-18T11:42:46Z
info:eu-repo/semantics/article
info:eu-repo/semantics/acceptedVersion
Versió postprint del document publicat a: https://doi.org/10.1016/j.elecom.2018.09.009
Electrochemistry Communications, 2018, vol. 96, p. 42-46
https://doi.org/10.1016/j.elecom.2018.09.009
cc-by-nc-nd (c) Elsevier B.V., 2018
http://creativecommons.org/licenses/by-nc-nd/3.0/es
info:eu-repo/semantics/openAccess
Elsevier B.V.
Articles publicats en revistes (Ciència dels Materials i Química Física)