Morphological and semiconductive properties of the anodic oxide layers made on Fe3Al alloy by anodizing in tartaric-sulfuric acid mixture
Abstract It has recently been found that the anodizing of FeAl alloys allows the formation of iron-aluminum oxide layers with interesting semiconducting properties. However, the lack of systematic research on different anodizing regimes is hampering their full exploitation in numerous photoelectroch...
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Nature Portfolio
2023-09-01
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| Series: | Scientific Reports |
| Online Access: | https://doi.org/10.1038/s41598-023-42311-x |
| _version_ | 1797452749012467712 |
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| author | Rubén del Olmo Magdalena Łazińska Mateusz Czerwiński Tomasz Durejko Marta Michalska-Domańska |
| author_facet | Rubén del Olmo Magdalena Łazińska Mateusz Czerwiński Tomasz Durejko Marta Michalska-Domańska |
| author_sort | Rubén del Olmo |
| collection | DOAJ |
| description | Abstract It has recently been found that the anodizing of FeAl alloys allows the formation of iron-aluminum oxide layers with interesting semiconducting properties. However, the lack of systematic research on different anodizing regimes is hampering their full exploitation in numerous photoelectrochemical-related applications. This study address, for the first time, the systematic effect of the electrolyte composition on the formation of self-ordered oxide films by anodizing on cast Fe3Al alloy. The Fe3Al alloy was anodized in 3 electrolytes with different water-ethylene glycol (EG) ratios (pure water, 25 vol.%-EG, and 50 vol.%-EG solutions) at a constant tartaric-sulfuric acids concentration, different voltages (10–20 V) and treatment times (2–60 min). After anodizing, all anodic oxide layers were annealed at 900 °C to form semiconductive iron-aluminum crystalline phases. Conventional techniques were used to systematically ascertain the morphological (SEM/EDS, XRD, eddy-current measurements) and semiconductive (UV–VIS reflectance spectroscopy) properties of these oxide layers. The results confirmed the formation of homogeneous and self-ordered anodic oxide layers at 10 and 15 V, regardless of the electrolyte composition. Namely, anodic films formed in electrolytes containing EG showed lower pore sizes, growth rates, and film thicknesses than those anodic films formed in the aqueous-based electrolyte. The annealing post-treatment results in different Fe-Al oxides (FexOy, FeAl2O4, etc.) with superior band gap values than those for non-annealed films. |
| first_indexed | 2024-03-09T15:12:09Z |
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| id | doaj.art-d52d1533dc6949808a17feccc990440e |
| institution | Directory Open Access Journal |
| issn | 2045-2322 |
| language | English |
| last_indexed | 2024-03-09T15:12:09Z |
| publishDate | 2023-09-01 |
| publisher | Nature Portfolio |
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| series | Scientific Reports |
| spelling | doaj.art-d52d1533dc6949808a17feccc990440e2023-11-26T13:18:26ZengNature PortfolioScientific Reports2045-23222023-09-0113111310.1038/s41598-023-42311-xMorphological and semiconductive properties of the anodic oxide layers made on Fe3Al alloy by anodizing in tartaric-sulfuric acid mixtureRubén del Olmo0Magdalena Łazińska1Mateusz Czerwiński2Tomasz Durejko3Marta Michalska-Domańska4Institute of Optoelectronics, Military University of TechnologyInstitute of Materials Science and Engineering, Faculty of Advanced Technologies and Chemistry, Military University of TechnologyInstitute of Optoelectronics, Military University of TechnologyInstitute of Materials Science and Engineering, Faculty of Advanced Technologies and Chemistry, Military University of TechnologyInstitute of Optoelectronics, Military University of TechnologyAbstract It has recently been found that the anodizing of FeAl alloys allows the formation of iron-aluminum oxide layers with interesting semiconducting properties. However, the lack of systematic research on different anodizing regimes is hampering their full exploitation in numerous photoelectrochemical-related applications. This study address, for the first time, the systematic effect of the electrolyte composition on the formation of self-ordered oxide films by anodizing on cast Fe3Al alloy. The Fe3Al alloy was anodized in 3 electrolytes with different water-ethylene glycol (EG) ratios (pure water, 25 vol.%-EG, and 50 vol.%-EG solutions) at a constant tartaric-sulfuric acids concentration, different voltages (10–20 V) and treatment times (2–60 min). After anodizing, all anodic oxide layers were annealed at 900 °C to form semiconductive iron-aluminum crystalline phases. Conventional techniques were used to systematically ascertain the morphological (SEM/EDS, XRD, eddy-current measurements) and semiconductive (UV–VIS reflectance spectroscopy) properties of these oxide layers. The results confirmed the formation of homogeneous and self-ordered anodic oxide layers at 10 and 15 V, regardless of the electrolyte composition. Namely, anodic films formed in electrolytes containing EG showed lower pore sizes, growth rates, and film thicknesses than those anodic films formed in the aqueous-based electrolyte. The annealing post-treatment results in different Fe-Al oxides (FexOy, FeAl2O4, etc.) with superior band gap values than those for non-annealed films.https://doi.org/10.1038/s41598-023-42311-x |
| spellingShingle | Rubén del Olmo Magdalena Łazińska Mateusz Czerwiński Tomasz Durejko Marta Michalska-Domańska Morphological and semiconductive properties of the anodic oxide layers made on Fe3Al alloy by anodizing in tartaric-sulfuric acid mixture Scientific Reports |
| title | Morphological and semiconductive properties of the anodic oxide layers made on Fe3Al alloy by anodizing in tartaric-sulfuric acid mixture |
| title_full | Morphological and semiconductive properties of the anodic oxide layers made on Fe3Al alloy by anodizing in tartaric-sulfuric acid mixture |
| title_fullStr | Morphological and semiconductive properties of the anodic oxide layers made on Fe3Al alloy by anodizing in tartaric-sulfuric acid mixture |
| title_full_unstemmed | Morphological and semiconductive properties of the anodic oxide layers made on Fe3Al alloy by anodizing in tartaric-sulfuric acid mixture |
| title_short | Morphological and semiconductive properties of the anodic oxide layers made on Fe3Al alloy by anodizing in tartaric-sulfuric acid mixture |
| title_sort | morphological and semiconductive properties of the anodic oxide layers made on fe3al alloy by anodizing in tartaric sulfuric acid mixture |
| url | https://doi.org/10.1038/s41598-023-42311-x |
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