Slot-Die Process of a Sol–Gel Photocatalytic Porous Coating for Large-Area Fabrication of Functional Architectural Glass
The slot-die process is an appealing technology for the fabrication of coatings on large-area substrates. However, its application on the production of photocatalytic coatings based on sol–gel formulations remains virtually unexplored. Thus, assessing the suitable formulation of the sol and operatio...
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MDPI AG
2021-06-01
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| Series: | Catalysts |
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| Online Access: | https://www.mdpi.com/2073-4344/11/6/711 |
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| author | Adrián Angulo-Ibáñez Estibaliz Aranzabe Garikoitz Beobide Oscar Castillo Amaia M. Goitandia Sonia Pérez-Yáñez Antia Villamayor |
| author_facet | Adrián Angulo-Ibáñez Estibaliz Aranzabe Garikoitz Beobide Oscar Castillo Amaia M. Goitandia Sonia Pérez-Yáñez Antia Villamayor |
| author_sort | Adrián Angulo-Ibáñez |
| collection | DOAJ |
| description | The slot-die process is an appealing technology for the fabrication of coatings on large-area substrates. However, its application on the production of photocatalytic coatings based on sol–gel formulations remains virtually unexplored. Thus, assessing the suitable formulation of the sol and operational parameters that allow one to yield high-efficacy photocatalyst coatings is a current challenge. This work aims to analyze the transferability of titania sol formulation optimized for dip-coating processes to slot-die technology. In this sense, firstly, the sol formulation is optimized by analyzing the influence of several types of surfactants on the microstructural features and photoactivity of TiO<sub>2</sub> coatings’ growth on glass substrates. All formulations rendered a meaningful porosity and nanoscopic anatase crystallites (11–15 nm) with optical band gap values close to the expectation (3.25–3.31 eV). Accordingly, the performance of the photocatalytic dye degradation was closely related to the porosity and crystallite size led by each titania sol, and no meaningful differences were found between the results provided by the coatings developed by dip-coating and the slot-die method, which demonstrates the capability of the latter for its application on a large-scale fabrication of photocatalytic coatings. |
| first_indexed | 2024-03-10T10:39:41Z |
| format | Article |
| id | doaj.art-1789b92fcf58466dbe8929c2a1d2d6c7 |
| institution | Directory Open Access Journal |
| issn | 2073-4344 |
| language | English |
| last_indexed | 2024-03-10T10:39:41Z |
| publishDate | 2021-06-01 |
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| record_format | Article |
| series | Catalysts |
| spelling | doaj.art-1789b92fcf58466dbe8929c2a1d2d6c72023-11-21T22:59:52ZengMDPI AGCatalysts2073-43442021-06-0111671110.3390/catal11060711Slot-Die Process of a Sol–Gel Photocatalytic Porous Coating for Large-Area Fabrication of Functional Architectural GlassAdrián Angulo-Ibáñez0Estibaliz Aranzabe1Garikoitz Beobide2Oscar Castillo3Amaia M. Goitandia4Sonia Pérez-Yáñez5Antia Villamayor6Surface Chemistry & Nanotechnologies Unit, Tekniker, Basque Research and Technology Alliance (BRTA), C/Iñaki Goenaga 5, 20600 Eibar, SpainSurface Chemistry & Nanotechnologies Unit, Tekniker, Basque Research and Technology Alliance (BRTA), C/Iñaki Goenaga 5, 20600 Eibar, SpainDepartament of Inorganic Chemistry, Faculty of Science and Technology, University of the Basque Country, 48940 Leioa, SpainDepartament of Inorganic Chemistry, Faculty of Science and Technology, University of the Basque Country, 48940 Leioa, SpainSurface Chemistry & Nanotechnologies Unit, Tekniker, Basque Research and Technology Alliance (BRTA), C/Iñaki Goenaga 5, 20600 Eibar, SpainDepartament of Inorganic Chemistry, Faculty of Science and Technology, University of the Basque Country, 48940 Leioa, SpainPhysics of Surfaces and Materials Unit, Tekniker, Basque Research and Technology Alliance (BRTA), C/Iñaki Goenaga 5, 20600 Eibar, SpainThe slot-die process is an appealing technology for the fabrication of coatings on large-area substrates. However, its application on the production of photocatalytic coatings based on sol–gel formulations remains virtually unexplored. Thus, assessing the suitable formulation of the sol and operational parameters that allow one to yield high-efficacy photocatalyst coatings is a current challenge. This work aims to analyze the transferability of titania sol formulation optimized for dip-coating processes to slot-die technology. In this sense, firstly, the sol formulation is optimized by analyzing the influence of several types of surfactants on the microstructural features and photoactivity of TiO<sub>2</sub> coatings’ growth on glass substrates. All formulations rendered a meaningful porosity and nanoscopic anatase crystallites (11–15 nm) with optical band gap values close to the expectation (3.25–3.31 eV). Accordingly, the performance of the photocatalytic dye degradation was closely related to the porosity and crystallite size led by each titania sol, and no meaningful differences were found between the results provided by the coatings developed by dip-coating and the slot-die method, which demonstrates the capability of the latter for its application on a large-scale fabrication of photocatalytic coatings.https://www.mdpi.com/2073-4344/11/6/711photocatalytic windowsTiO<sub>2</sub> thin-filmsslot-dieporous coatingsanatase |
| spellingShingle | Adrián Angulo-Ibáñez Estibaliz Aranzabe Garikoitz Beobide Oscar Castillo Amaia M. Goitandia Sonia Pérez-Yáñez Antia Villamayor Slot-Die Process of a Sol–Gel Photocatalytic Porous Coating for Large-Area Fabrication of Functional Architectural Glass Catalysts photocatalytic windows TiO<sub>2</sub> thin-films slot-die porous coatings anatase |
| title | Slot-Die Process of a Sol–Gel Photocatalytic Porous Coating for Large-Area Fabrication of Functional Architectural Glass |
| title_full | Slot-Die Process of a Sol–Gel Photocatalytic Porous Coating for Large-Area Fabrication of Functional Architectural Glass |
| title_fullStr | Slot-Die Process of a Sol–Gel Photocatalytic Porous Coating for Large-Area Fabrication of Functional Architectural Glass |
| title_full_unstemmed | Slot-Die Process of a Sol–Gel Photocatalytic Porous Coating for Large-Area Fabrication of Functional Architectural Glass |
| title_short | Slot-Die Process of a Sol–Gel Photocatalytic Porous Coating for Large-Area Fabrication of Functional Architectural Glass |
| title_sort | slot die process of a sol gel photocatalytic porous coating for large area fabrication of functional architectural glass |
| topic | photocatalytic windows TiO<sub>2</sub> thin-films slot-die porous coatings anatase |
| url | https://www.mdpi.com/2073-4344/11/6/711 |
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