2026-04-17T03:20:13Zhttps://recercat.cat/oai/request
oai:recercat.cat:2445/2088502026-02-14T19:58:58Zcom_2072_1057col_2072_478796col_2072_478917
RECERCAT author Da Silva, T.F. author Cavalheri, P.S. author Cardoso, J.C. author Nazario, C.E.D. author Jorge, J. author Martines, M.A.U. author Ravaglia, L.M. author Alcantara, G.B. author Casagrande, G.A. author Caires, A.R.L. author Cavalcante, R.P. author de Oliveira, S.C. author Gozzi, F. author Sirés Sadornil, Ignacio author Machulek Jr., A. 2024-03-15T16:33:20Z2026-02-13T06:10:39Z2024-02-142024-03-15T16:33:20Z Metal-organic frameworks (MOFs) based on Fe exhibit great potential as highly effective photocatalysts for water treatment applications. TiO2 nanotube photoanodes decorated with 170–370 μg cm−2 of MIL-53(Fe) and Fe-MOF (i.e., melamine-modified MIL-53(Fe)) were synthesized and evaluated in the photoassisted electrochemical degradation of 2,4-dimethylaniline (2,4-DMA) under visible light irradiation. The morphological, optical, and electrochemical properties of the photoanodes were evaluated by SEM, TEM, FTIR, XPS, BET, PL, XRD, DRS, zeta potential, linear voltammetry, EIS, and Mott-Schottky technique, respectively. The absorption band of the carboxyl groups coordinated to the iron centers is observed by FTIR at 1550 cm−1, whereas a peak at 538 cm−1 is related the formation of metal-oxo bonds between the carboxylic group of terephthalic acid and Fe3+. The modification of MIL-53(Fe) through the insertion of melamine led to a reduction in the formed nanoparticles. The photoelectrochemical activity of MIL-53(Fe) at pH 3.0 was optimized using a central composite design (CCD) experimental plan, with H2O2 concentration, applied anode potential (Ean) and reaction time as variables under study. Upon addition of 10 mg L−1 H2O2, a degradation of 74.4% of 2,4-DMA was achieved at Ean = 1.0 V after 110 min, outperforming the 57% reached using an unmodified TiO2 nanotube photoanode. Further modification of the MIL-53(Fe) with melamine allowed obtaining an almost total degradation. A plausible degradation pathway for 2,4-DMA is discussed from NMR and HPLC-MS/MS results. This work demonstrates the promising photoelectrocatalytic activity of TiO2 photoanodes decorated with Fe-based MOFs. cc-by-nc-nd (c) Elsevier B.V., 2024 http://creativecommons.org/licenses/by-nc-nd/4.0/ info:eu-repo/semantics/openAccess Fotoelectroquímica Diòxid de titani Nanotubs Photoelectrochemistry Titanium dioxide Nanotubes Development of a TiO 2 nanotube photoanode decorated with MIL-53(Fe) for the photoelectrochemical degradation of 2,4-dimethylaniline info:eu-repo/semantics/article info:eu-repo/semantics/acceptedVersion