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Characterization and comparison of Ti/TiO2-NT/SnO2-SbBi, Ti/SnO2-SbBi and BDD anode for the removal of persistent iodinated contrast media (ICM).
Chemosphere. 2020 Aug; 253:126701.C

Abstract

In this study, we investigated the impact of a TiO2 nanotube (NT) interlayer on the electrochemical performance and service life of Sb and Bi-doped SnO2-coatings synthesized on a titanium mesh. Ti/SnO2-SbBi electrode was synthetized by a thermal decomposition method using ionic liquid as a precursor solvent. Ti/TiO2-NT/SnO2-SbBi electrode was obtained by a two-step electrochemical anodization, followed by the same process of thermal decomposition. The synthesized electrodes were electrochemically characterized and analyzed by scanning electron microscopy and energy dispersive X-ray spectroscopy. Terephthalic acid (TA) experiments showed that Ti/SnO2-SbBi and Ti/TiO2-NT/SnO2-SbBi electrodes formed somewhat higher amounts of hydroxyl radicals (HO) compared with the mesh boron doped diamond (BDD) anode. Electrochemical oxidation experiments were performed using iodinated contrast media (ICM) as model organic contaminants persistent to oxidation. At current density of 50 A m-2, BDD clearly outperformed the synthesized mixed metal oxide (MMO) electrodes, with 2 to 3-fold higher oxidation rates observed for ICM. However, at 100 and 150 A m-2, Ti/SnO2-SbBi had similar performance to BDD, whereas Ti/TiO2-NT/SnO2-SbBi yielded even higher oxidation rates. Disappearance of the target ICM was followed by up to 80% removal of adsorbable organic iodide (AOI) for all three materials, further demonstrating iodine cleavage and thus oxidative degradation of ICM mediated by HO. The presence of a TiO2 NT interlayer yielded nearly 4-fold increase in anode stability and dislocated the oxygen evolution reaction by +0.2 V. Thus, TiO2 NT interlayer enhanced electrode stability and service life, and the electrocatalytic activity for the degradation of persistent organic contaminants.

Authors+Show Affiliations

Process Engineering Post-Graduation Program, Universidade Tiradentes, Av. Murilo Dantas, s/n, Aracaju, SE, Brazil; Instituto de Tecnologia e Pesquisa, Av. Murilo Dantas, s/n, Aracaju, SE, Brazil.Catalan Institute of Water Research, c/Emili Grahit, 101, Girona, Spain; University of Girona, Girona, Spain.Process Engineering Post-Graduation Program, Universidade Tiradentes, Av. Murilo Dantas, s/n, Aracaju, SE, Brazil; Instituto de Tecnologia e Pesquisa, Av. Murilo Dantas, s/n, Aracaju, SE, Brazil.Process Engineering Post-Graduation Program, Universidade Tiradentes, Av. Murilo Dantas, s/n, Aracaju, SE, Brazil; Instituto de Tecnologia e Pesquisa, Av. Murilo Dantas, s/n, Aracaju, SE, Brazil.Catalan Institute of Water Research, c/Emili Grahit, 101, Girona, Spain; Catalan Institution for Research and Advanced Studies (ICREA), Passeig Lluís Companys 23, 08010, Barcelona, Spain. Electronic address: jradjenovic@icra.cat.

Pub Type(s)

Journal Article

Language

eng

PubMed ID

32302902

Citation

Moura de Salles Pupo, Marilia, et al. "Characterization and Comparison of Ti/TiO2-NT/SnO2-SbBi, Ti/SnO2-SbBi and BDD Anode for the Removal of Persistent Iodinated Contrast Media (ICM)." Chemosphere, vol. 253, 2020, p. 126701.
Moura de Salles Pupo M, Albahaca Oliva JM, Barrios Eguiluz KI, et al. Characterization and comparison of Ti/TiO2-NT/SnO2-SbBi, Ti/SnO2-SbBi and BDD anode for the removal of persistent iodinated contrast media (ICM). Chemosphere. 2020;253:126701.
Moura de Salles Pupo, M., Albahaca Oliva, J. M., Barrios Eguiluz, K. I., Salazar-Banda, G. R., & Radjenovic, J. (2020). Characterization and comparison of Ti/TiO2-NT/SnO2-SbBi, Ti/SnO2-SbBi and BDD anode for the removal of persistent iodinated contrast media (ICM). Chemosphere, 253, 126701. https://doi.org/10.1016/j.chemosphere.2020.126701
Moura de Salles Pupo M, et al. Characterization and Comparison of Ti/TiO2-NT/SnO2-SbBi, Ti/SnO2-SbBi and BDD Anode for the Removal of Persistent Iodinated Contrast Media (ICM). Chemosphere. 2020;253:126701. PubMed PMID: 32302902.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Characterization and comparison of Ti/TiO2-NT/SnO2-SbBi, Ti/SnO2-SbBi and BDD anode for the removal of persistent iodinated contrast media (ICM). AU - Moura de Salles Pupo,Marilia, AU - Albahaca Oliva,José Miguel, AU - Barrios Eguiluz,Katlin Ivon, AU - Salazar-Banda,Giancarlo Richard, AU - Radjenovic,Jelena, Y1 - 2020/04/09/ PY - 2020/02/03/received PY - 2020/04/01/revised PY - 2020/04/02/accepted PY - 2020/4/18/pubmed PY - 2020/6/27/medline PY - 2020/4/18/entrez KW - Electrochemical oxidation KW - Iodinated contrast media KW - Mixed metal oxide electrode KW - TiO(2) nanotubes SP - 126701 EP - 126701 JF - Chemosphere JO - Chemosphere VL - 253 N2 - In this study, we investigated the impact of a TiO2 nanotube (NT) interlayer on the electrochemical performance and service life of Sb and Bi-doped SnO2-coatings synthesized on a titanium mesh. Ti/SnO2-SbBi electrode was synthetized by a thermal decomposition method using ionic liquid as a precursor solvent. Ti/TiO2-NT/SnO2-SbBi electrode was obtained by a two-step electrochemical anodization, followed by the same process of thermal decomposition. The synthesized electrodes were electrochemically characterized and analyzed by scanning electron microscopy and energy dispersive X-ray spectroscopy. Terephthalic acid (TA) experiments showed that Ti/SnO2-SbBi and Ti/TiO2-NT/SnO2-SbBi electrodes formed somewhat higher amounts of hydroxyl radicals (HO) compared with the mesh boron doped diamond (BDD) anode. Electrochemical oxidation experiments were performed using iodinated contrast media (ICM) as model organic contaminants persistent to oxidation. At current density of 50 A m-2, BDD clearly outperformed the synthesized mixed metal oxide (MMO) electrodes, with 2 to 3-fold higher oxidation rates observed for ICM. However, at 100 and 150 A m-2, Ti/SnO2-SbBi had similar performance to BDD, whereas Ti/TiO2-NT/SnO2-SbBi yielded even higher oxidation rates. Disappearance of the target ICM was followed by up to 80% removal of adsorbable organic iodide (AOI) for all three materials, further demonstrating iodine cleavage and thus oxidative degradation of ICM mediated by HO. The presence of a TiO2 NT interlayer yielded nearly 4-fold increase in anode stability and dislocated the oxygen evolution reaction by +0.2 V. Thus, TiO2 NT interlayer enhanced electrode stability and service life, and the electrocatalytic activity for the degradation of persistent organic contaminants. SN - 1879-1298 UR - https://www.unboundmedicine.com/medline/citation/32302902/Characterization_and_comparison_of_Ti/TiO2_NT/SnO2_SbBi_Ti/SnO2_SbBi_and_BDD_anode_for_the_removal_of_persistent_iodinated_contrast_media__ICM__ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0045-6535(20)30894-8 DB - PRIME DP - Unbound Medicine ER -