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Sunlight-Driven AO7 Degradation with Perovskites (La,Ba)(Fe,Ti)O3 as Heterogeneous Photocatalysts

2021Journal article Open access
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dc.contributor.authorRodrigues, Ana Sofia
dc.contributor.authorCiríaco, Lurdes
dc.contributor.authorPacheco, Maria José
dc.contributor.authorFernandes, Annabel
dc.contributor.authorMogo, Sandra
dc.contributor.authorLopes, Ana
dc.date.accessioned2022-10-07T09:01:58Z
dc.date.available2022-10-07T09:01:58Z
dc.date.issued2021
dc.description.abstractPerovskites of the (La,Ba)(Fe,Ti)O3 family were prepared, characterized, and utilized as heterogeneous photocatalysts, activated by natural sunlight, for environmental remediation of Acid Orange 7 (AO7) aqueous solutions. Catalysts were prepared by the ceramic (CM) and the complex polymerization (CP) methods and characterized by XRD, SEM, EDS, and band gap energy. It was found that catalytic properties depend on the synthesis method and annealing conditions. In the photocatalytic assays with sunlight, different AO7 initial concentrations and perovskite amounts were tested. During photocatalytic assays, AO7 and degradation products concentrations were followed by HPLC. Only photocatalysis with BaFeO3 -CM and BaTiO3 -CP presented AO7 removals higher than that observed for photolysis. However, photolysis leads to the formation of almost exclusively amino-naphthol and sulfanilic acid, whereas some of the perovskites utilized form lesstoxic compounds as degradation products, such as carboxylic acids (CA). Partial substitution of Ba by La in BaTiO3 -CM does not produce any change in the photocatalytic properties, but the replacement of Ti by Fe in the La0.1Ba0.9TiO3 leads to reduced AO7 removal rate, but with the formation of CAs. The best AO7 removal (92%) was obtained with BaFeO3 -CM (750 mg L−1 ), after 4 h of photocatalytic degradation with solar radiation
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.doi10.3390/nano11113142pt_PT
dc.identifier.urihttp://hdl.handle.net/10400.6/12364
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.subjectPerovskites (La,Ba)(Fe,Ti)O3
dc.subjectPhotocatalysis
dc.subjectSunlight
dc.subjectCeramic method
dc.subjectComplex polymerization
dc.titleSunlight-Driven AO7 Degradation with Perovskites (La,Ba)(Fe,Ti)O3 as Heterogeneous Photocatalystspt_PT
dc.typejournal article
dspace.entity.typePublication
oaire.citation.issue11pt_PT
oaire.citation.startPage3142pt_PT
oaire.citation.titleNanomaterialspt_PT
oaire.citation.volume11pt_PT
person.familyNameFreire Rodrigues
person.familyNameFranco Ciríaco
person.familyNameAlvelos Pacheco
person.familyNameFernandes
person.familyNameMogo
person.familyNameLopes
person.givenNameAna Sofia
person.givenNameMaria de Lurdes
person.givenNameMaria José
person.givenNameAnnabel
person.givenNameSandra
person.givenNameAna
person.identifier1331192
person.identifier340036
person.identifier.ciencia-idE41C-D489-56C1
person.identifier.ciencia-idA31C-1E64-BD11
person.identifier.ciencia-idAE12-F394-B4EF
person.identifier.ciencia-idC81C-978E-4401
person.identifier.ciencia-id1717-63EA-3853
person.identifier.ciencia-idFB1D-4FB4-A596
person.identifier.orcid0000-0002-0047-4965
person.identifier.orcid0000-0003-0020-1243
person.identifier.orcid0000-0002-8268-6872
person.identifier.orcid0000-0002-9007-5342
person.identifier.orcid0000-0002-1423-2668
person.identifier.orcid0000-0002-4545-5784
person.identifier.ridK-5755-2018
person.identifier.ridI-8552-2014
person.identifier.scopus-author-id22635625800
person.identifier.scopus-author-id55937369500
person.identifier.scopus-author-id6508333851
person.identifier.scopus-author-id55423519700
rcaap.rightsopenAccesspt_PT
rcaap.typearticlept_PT
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