Nitrite Reduction Enhancement on Semiconducting Electrode Decorated with Copper(II) Aspirinate Complex

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dc.contributor.authorSayão, Fabiana A. [UNESP]
dc.contributor.authorda Silva Flor, Jader Barbosa [UNESP]
dc.contributor.authorFrem, Regina Célia Galvão [UNESP]
dc.contributor.authorStulp, Simone
dc.contributor.authorCardoso, Juliano C. [UNESP]
dc.contributor.authorZanoni, Maria V. B. [UNESP]
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.contributor.institutionCentro Universitário Univates
dc.date.accessioned2018-12-11T17:29:50Z
dc.date.available2018-12-11T17:29:50Z
dc.date.issued2016-11-01
dc.description.abstractThe present work seeks to describe a new approach characterized by copper(II) aspirinate complex deposited onto nanotube TiO2 electrodes as mediator of electron transfer during nitrite reduction, aiming at achieving a faster removal of nitrite to nitrogen species oxides. Thin films of copper aspirinate ([Cu2(asp)4]) on the Ti/TiO2 nanotube surface are easily obtained following multi-scans (100 cycles) recorded for the Ti/TiO2 electrode in 0.1 mol L−1 NaCl, pH 4, containing 5.0 × 10−4 mol L−1 of the copper coordination compound. The complex showed high adherence while the cyclic voltammograms presented redox peaks at −0.15/+0.15 V, which was attributed to the reduction of Cu(II) to Cu(I). Following 5 min of treatment using photoelectrocatalysis on Ti/TiO2-[(Cu)2Asp4] electrode, a total removal of nitrite was observed, which was found to be at least four times faster compared to Ti/TiO2 electrode. Concomitantly, we also observed a relatively good conversion to nitrogen-containing gaseous species (56 %) besides the formation of 42 % of ammonia. The results, in effect, also indicate that nitrate and nitrite are not detectable in the treated solution up to levels of 0.5 mg L−1. The method under consideration has successfully accounted for the maximum limit of nitrite recommended in drinking water which has been set to 1 mg L−1. [Figure not available: see fulltext.]en
dc.description.affiliationInstituto de Química de Araraquara Universidade Estadual Paulista “Júlio de Mesquita Filho” (UNESP), R. Prof. Francisco Degni, 55, P.O. Box 355
dc.description.affiliationCentro Universitário Univates, Rua Avelino Tallini, Bairro Universitário, 171
dc.description.affiliationUnespInstituto de Química de Araraquara Universidade Estadual Paulista “Júlio de Mesquita Filho” (UNESP), R. Prof. Francisco Degni, 55, P.O. Box 355
dc.format.extent486-494
dc.identifierhttp://dx.doi.org/10.1007/s12678-016-0327-9
dc.identifier.citationElectrocatalysis, v. 7, n. 6, p. 486-494, 2016.
dc.identifier.doi10.1007/s12678-016-0327-9
dc.identifier.file2-s2.0-84991387383.pdf
dc.identifier.issn1868-5994
dc.identifier.issn1868-2529
dc.identifier.scopus2-s2.0-84991387383
dc.identifier.urihttp://hdl.handle.net/11449/178339
dc.language.isoeng
dc.relation.ispartofElectrocatalysis
dc.relation.ispartofsjr0,994
dc.relation.ispartofsjr0,994
dc.rights.accessRightsAcesso aberto
dc.sourceScopus
dc.subjectCopper(II) aspirinate complex
dc.subjectNitrite removal
dc.subjectPhotoelectrocatalysis reductive process
dc.subjectPhotoelectrocatalytic reduction of nitrite
dc.titleNitrite Reduction Enhancement on Semiconducting Electrode Decorated with Copper(II) Aspirinate Complexen
dc.typeArtigo

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