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Degradation of emerging contaminants: effect of thermal treatment on nb2o5 as photocatalyst

2021Journal article Restricted access
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dc.contributor.authorAbreu, Eduardo
dc.contributor.authorFidelis, Michel Zampieri
dc.contributor.authorFuziki, Maria Eduarda Kounaris
dc.contributor.authorMalikoski, R.M.
dc.contributor.authorMastsubara, M.C.
dc.contributor.authorImada, R.E.
dc.contributor.authorDíaz de Tuesta, Jose Luis
dc.contributor.authorGomes, Helder
dc.contributor.authorAnziliero, M.D.
dc.contributor.authorBaldykowski, B.
dc.contributor.authorDias, Daniele Toniolo
dc.contributor.authorLenzi, Giane G.
dc.date.accessioned2021-10-01T15:19:53Z
dc.date.available2021-10-01T15:19:53Z
dc.date.issued2021
dc.description.abstractThis study describes the use Nb2O5 catalysts – calcined at different temperatures (373–873 K) – in the photo-catalytic degradation reaction of four contaminants of emerging concern: acetylsalicylic acid (ASA), 17α-ethi-nylestradiol (EE2), ibuprofen (IBP) and paracetamol (PAR). The photocatalysts were characterized by different techniques – N2 adsorption/desorption, photoacoustic spectroscopy (PAS), Fourier Transform Infrared (FT-IR) and X-ray diffraction (XRD) – and applied in the photocatalytic degradation tests. Among the tested catalysts, non-calcined Nb2O5 showed the highest photocatalytic activity. The characterization results indicated that this catalyst presented an amorphous (non-crystalline) structure, low band gap and the highest surface area (SBET =182 m2 g-1). A design of experiments (DoE) methodology was applied in order to verify the effects of pH (4–10) and catalyst concentration (0.5–1.5 g L-1) in the four pollutants removal using the non-calcined Nb2O5. Ac-cording to the Experimental Design Analysis, a statistically significant linear effect with a negative coefficient was observed for pH in EE2, IBP and PAR photocatalytic degradation. Tests to verify the influence of the presence compounds together in the degradation reaction of each contaminant, suggested that the photocatalytic degradation of IBP occurs predominantly through the action of radicals O2•-, , with minor contribution from HO•.pt_PT
dc.description.sponsorshipThe authors are thankful to the Brazilian agencies CNPq, CAPES and Fundação Araucária for financial support of this work, C2MMa and Brazilian Mining and Metallurgy Company – CBMM. This work was financially supported by project CIMO (UIDB/00690/2020) through FEDER under Program PT2020.pt_PT
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.citationAbreu, Eduardo; Fidelis, Michel Zampieri; Fuziki, Maria Eduarda Kounaris; Malikoski, R.M.; Mastsubara, M.C.; Imada, R.E.; Díaz de Tuesta, Jose Luis; Gomes, Helder; Anziliero, M.D.; Baldykowski, B.; Dias, Daniele Toniolo; Lenzi, Giane Gonçalves (2021). Degradation of emerging contaminants: effect of thermal treatment on nb2o5 as photocatalyst. Journal of Photochemistry and Photobiology A: Chemistry. ISSN 1010-6030. 419, p. 1-14pt_PT
dc.identifier.doi10.1016/j.jphotochem.2021.113484pt_PT
dc.identifier.issn1010-6030
dc.identifier.urihttp://hdl.handle.net/10198/23955
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.publisherElsevier
dc.relationMountain Research Center
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/pt_PT
dc.subjectPhotocatalysispt_PT
dc.subjectBand gappt_PT
dc.subjectDrugs degradationpt_PT
dc.subjectDesign of experimentspt_PT
dc.titleDegradation of emerging contaminants: effect of thermal treatment on nb2o5 as photocatalystpt_PT
dc.typejournal article
dspace.entity.typePublication
oaire.awardTitleMountain Research Center
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/6817 - DCRRNI ID/UIDB%2F00690%2F2020/PT
oaire.citation.startPage113484pt_PT
oaire.citation.titleJournal of Photochemistry and Photobiology A: Chemistrypt_PT
oaire.citation.volume419pt_PT
oaire.fundingStream6817 - DCRRNI ID
person.familyNameDíaz de Tuesta
person.familyNameGomes
person.givenNameJose Luis
person.givenNameHelder
person.identifier.ciencia-id7A1F-022B-7DBF
person.identifier.ciencia-id6218-1E19-13EE
person.identifier.orcid0000-0003-2408-087X
person.identifier.orcid0000-0001-6898-2408
person.identifier.ridD-9785-2017
person.identifier.scopus-author-id55755821600
project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.nameFundação para a Ciência e a Tecnologia
rcaap.rightsrestrictedAccesspt_PT
rcaap.typearticlept_PT
relation.isAuthorOfPublication2ad0465f-5f8a-4b14-90f5-bf85996f9ce1
relation.isAuthorOfPublication0eb96337-224a-4339-9918-334436fbbb99
relation.isAuthorOfPublication.latestForDiscovery0eb96337-224a-4339-9918-334436fbbb99
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