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Physicochemical and photoelectrochemical characterization of nanostructured oxide layers grown by anodic oxidation of Fe40Al in etidronic acid-based electrolyte
FeAl alloy
anodization
anodic iron oxide
photoelectrochemistry
Although it has already been reported that anodic oxidation of various FeAl alloys can be successfully employed for the fabrication of nanostructured semiconducting oxide films, the photoelectrochemical activity of this kind of materials has not been studied so far. Therefore, this work reports, for the very first time, a detailed characterization of the physicochemical and photoelectrochemical properties of nanostructured anodic layers obtained by one-step anodization of Fe40Al in an etidronic acid-based electrolyte, followed by thermal treatment and chemical etching. The morphology of the obtained materials has been verified by SEM, while their composition and properties have been carefully evaluated by various techniques including EDS, XRD, XPS, UV–Vis, and Raman spectroscopy. The photoelectrochemical activity of the materials was assessed using a 1.5 G solar light simulator and carefully discussed in relation to the synthesis procedure, morphology, and composition of the semiconducting layers. As-anodized layers with well-developed nanoporous morphology were composed mostly of amorphous aluminum and iron oxides. The latter was converted to hematite by thermal treatment in air at 400 °C without any morphological changes. Subsequent chemical etching in NaOH resulted in preferential dissolution of aluminum oxide, which was accompanied by loss of porous morphology. Both, annealed and etched layers exhibit pronounced photoelectrochemical activity, and the values of generated photocurrents as well as charge recombination behavior were found to be strongly dependent on the synthesis procedure.
dc.abstract.en | Although it has already been reported that anodic oxidation of various FeAl alloys can be successfully employed for the fabrication of nanostructured semiconducting oxide films, the photoelectrochemical activity of this kind of materials has not been studied so far. Therefore, this work reports, for the very first time, a detailed characterization of the physicochemical and photoelectrochemical properties of nanostructured anodic layers obtained by one-step anodization of Fe40Al in an etidronic acid-based electrolyte, followed by thermal treatment and chemical etching. The morphology of the obtained materials has been verified by SEM, while their composition and properties have been carefully evaluated by various techniques including EDS, XRD, XPS, UV–Vis, and Raman spectroscopy. The photoelectrochemical activity of the materials was assessed using a 1.5 G solar light simulator and carefully discussed in relation to the synthesis procedure, morphology, and composition of the semiconducting layers. As-anodized layers with well-developed nanoporous morphology were composed mostly of amorphous aluminum and iron oxides. The latter was converted to hematite by thermal treatment in air at 400 °C without any morphological changes. Subsequent chemical etching in NaOH resulted in preferential dissolution of aluminum oxide, which was accompanied by loss of porous morphology. Both, annealed and etched layers exhibit pronounced photoelectrochemical activity, and the values of generated photocurrents as well as charge recombination behavior were found to be strongly dependent on the synthesis procedure. | |
dc.affiliation | Wydział Chemii : Zakład Chemii Fizycznej i Elektrochemii | |
dc.affiliation | Wydział Chemii : Zakład Chemii Nieorganicznej | |
dc.affiliation | Wydział Chemii : Zakład Krystalochemii i Krystalofizyki | |
dc.contributor.author | Zaraska, Leszek - 214236 | |
dc.contributor.author | Gurgul, Magdalena - 253652 | |
dc.contributor.author | Tynkevych, Olena - 227587 | |
dc.contributor.author | Pisarek, Marcin | |
dc.contributor.author | Kozieł, Marcin - 133981 | |
dc.contributor.author | Czerwiński, Mateusz | |
dc.contributor.author | Łazińska, Magdalena | |
dc.contributor.author | Michalska-Domańska, Marta | |
dc.date.accessioned | 2025-05-16T12:59:32Z | |
dc.date.available | 2025-05-16T12:59:32Z | |
dc.date.createdat | 2025-05-15T16:30:16Z | en |
dc.date.issued | 2025 | |
dc.description.volume | 528 | |
dc.identifier.articleid | 146261 | |
dc.identifier.doi | 10.1016/j.electacta.2025.146261 | |
dc.identifier.issn | 0013-4686 | |
dc.identifier.uri | https://ruj.uj.edu.pl/handle/item/552506 | |
dc.language | eng | |
dc.language.container | eng | |
dc.rights | Dodaję tylko opis bibliograficzny | |
dc.rights.licence | Bez licencji otwartego dostępu | |
dc.subject.en | FeAl alloy | |
dc.subject.en | anodization | |
dc.subject.en | anodic iron oxide | |
dc.subject.en | photoelectrochemistry | |
dc.subtype | Article | |
dc.title | Physicochemical and photoelectrochemical characterization of nanostructured oxide layers grown by anodic oxidation of Fe40Al in etidronic acid-based electrolyte | |
dc.title.journal | Electrochimica Acta | |
dc.type | JournalArticle | |
dspace.entity.type | Publication | en |