Evaluation of the Photocatalytic Activity and Anticorrosion Performance of Electrospun Fibers Doped with Metallic Oxides
This paper reports the development and characterization of a multifunctional coating that combines anticorrosion and photocatalytic properties, deposited by means of the electrospinning technique. In the first step, a functional electrospun fiber mat composed of poly(acrylic acid) (PAA) and β-cyclod...
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| Format: | Article |
| Language: | English |
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MDPI AG
2021-06-01
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| Series: | Polymers |
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| Online Access: | https://www.mdpi.com/2073-4360/13/12/2011 |
| _version_ | 1797529462326165504 |
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| author | Ainhoa Albistur Pedro J. Rivero Joseba Esparza Rafael Rodríguez |
| author_facet | Ainhoa Albistur Pedro J. Rivero Joseba Esparza Rafael Rodríguez |
| author_sort | Ainhoa Albistur |
| collection | DOAJ |
| description | This paper reports the development and characterization of a multifunctional coating that combines anticorrosion and photocatalytic properties, deposited by means of the electrospinning technique. In the first step, a functional electrospun fiber mat composed of poly(acrylic acid) (PAA) and β-cyclodextrin (β-CD) was obtained, showing high water insolubility and great adhesion increased by means of a thermal crosslinking process (denoted as PAA + β-CD). In the second step, the fibers were doped with particles of titanium dioxide (denoted as PAA + β-CD/TiO<sub>2</sub>) and titanium dioxide plus iron oxide (denoted as PAA + β-CD/TiO<sub>2</sub>/Fe<sub>2</sub>O<sub>3</sub>). The morphology and fiber diameter of the electrospun mats were evaluated by using confocal microscopy, whereas the presence of the metal oxides in the electrospun fibers was corroborated by scanning electron microscopy (SEM) and X-ray fluorescence (XRF), respectively. In addition, electrochemical tests in saline solution revealed that the sample composed of PAA + β-CD/TiO<sub>2</sub>/Fe<sub>2</sub>O<sub>3</sub> showed the highest corrosion protection efficiency of all the samples, which was directly associated to lower corrosion current density and higher corrosion potential. Furthermore, the paper reports a novel approach to in situ determination of methylene blue (MB) degradation onto the coating. The results revealed complete degradation of MB, which is perfectly appreciated by total discoloration of the film in the irradiated zone (from bluish to a white spot). The main conclusions of this research are the efficiency of the electrospun system PAA + β-CD/TiO<sub>2</sub>/Fe<sub>2</sub>O<sub>3</sub> for developing photocatalytic activity and corrosion protection and the utility of the dry MB discoloration tests to evaluate photocatalytic activity. |
| first_indexed | 2024-03-10T10:14:14Z |
| format | Article |
| id | doaj.art-028cdf5a2893429fb6776895e17b9116 |
| institution | Directory Open Access Journal |
| issn | 2073-4360 |
| language | English |
| last_indexed | 2024-03-10T10:14:14Z |
| publishDate | 2021-06-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Polymers |
| spelling | doaj.art-028cdf5a2893429fb6776895e17b91162023-11-22T00:55:20ZengMDPI AGPolymers2073-43602021-06-011312201110.3390/polym13122011Evaluation of the Photocatalytic Activity and Anticorrosion Performance of Electrospun Fibers Doped with Metallic OxidesAinhoa Albistur0Pedro J. Rivero1Joseba Esparza2Rafael Rodríguez3Engineering Department, Campus Arrosadía s/n, Public University of Navarre, 31006 Pamplona, SpainEngineering Department, Campus Arrosadía s/n, Public University of Navarre, 31006 Pamplona, SpainAIN, Asociación de la Industria Navarra, 31191 Pamplona, Cordovilla, SpainEngineering Department, Campus Arrosadía s/n, Public University of Navarre, 31006 Pamplona, SpainThis paper reports the development and characterization of a multifunctional coating that combines anticorrosion and photocatalytic properties, deposited by means of the electrospinning technique. In the first step, a functional electrospun fiber mat composed of poly(acrylic acid) (PAA) and β-cyclodextrin (β-CD) was obtained, showing high water insolubility and great adhesion increased by means of a thermal crosslinking process (denoted as PAA + β-CD). In the second step, the fibers were doped with particles of titanium dioxide (denoted as PAA + β-CD/TiO<sub>2</sub>) and titanium dioxide plus iron oxide (denoted as PAA + β-CD/TiO<sub>2</sub>/Fe<sub>2</sub>O<sub>3</sub>). The morphology and fiber diameter of the electrospun mats were evaluated by using confocal microscopy, whereas the presence of the metal oxides in the electrospun fibers was corroborated by scanning electron microscopy (SEM) and X-ray fluorescence (XRF), respectively. In addition, electrochemical tests in saline solution revealed that the sample composed of PAA + β-CD/TiO<sub>2</sub>/Fe<sub>2</sub>O<sub>3</sub> showed the highest corrosion protection efficiency of all the samples, which was directly associated to lower corrosion current density and higher corrosion potential. Furthermore, the paper reports a novel approach to in situ determination of methylene blue (MB) degradation onto the coating. The results revealed complete degradation of MB, which is perfectly appreciated by total discoloration of the film in the irradiated zone (from bluish to a white spot). The main conclusions of this research are the efficiency of the electrospun system PAA + β-CD/TiO<sub>2</sub>/Fe<sub>2</sub>O<sub>3</sub> for developing photocatalytic activity and corrosion protection and the utility of the dry MB discoloration tests to evaluate photocatalytic activity.https://www.mdpi.com/2073-4360/13/12/2011electrospun fiber matpolyacrylic acid (PAA)β-cyclodextrin (β-CD)thermal crosslinkcorrosion protectionphotocatalytic activity testing |
| spellingShingle | Ainhoa Albistur Pedro J. Rivero Joseba Esparza Rafael Rodríguez Evaluation of the Photocatalytic Activity and Anticorrosion Performance of Electrospun Fibers Doped with Metallic Oxides Polymers electrospun fiber mat polyacrylic acid (PAA) β-cyclodextrin (β-CD) thermal crosslink corrosion protection photocatalytic activity testing |
| title | Evaluation of the Photocatalytic Activity and Anticorrosion Performance of Electrospun Fibers Doped with Metallic Oxides |
| title_full | Evaluation of the Photocatalytic Activity and Anticorrosion Performance of Electrospun Fibers Doped with Metallic Oxides |
| title_fullStr | Evaluation of the Photocatalytic Activity and Anticorrosion Performance of Electrospun Fibers Doped with Metallic Oxides |
| title_full_unstemmed | Evaluation of the Photocatalytic Activity and Anticorrosion Performance of Electrospun Fibers Doped with Metallic Oxides |
| title_short | Evaluation of the Photocatalytic Activity and Anticorrosion Performance of Electrospun Fibers Doped with Metallic Oxides |
| title_sort | evaluation of the photocatalytic activity and anticorrosion performance of electrospun fibers doped with metallic oxides |
| topic | electrospun fiber mat polyacrylic acid (PAA) β-cyclodextrin (β-CD) thermal crosslink corrosion protection photocatalytic activity testing |
| url | https://www.mdpi.com/2073-4360/13/12/2011 |
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