| People | Locations | Statistics |
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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Hyvärinen, Leo
Tampere University
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (8/8 displayed)
- 2024Microstructure and tribological properties of solid lubricant-doped CMT-WAAMed Stellite deposits
- 2023Eddy-Current Loss Model for Soft Magnetic Composite Materials Considering Particle Size Distributioncitations
- 2021Crystallographic phase formation of iron oxide particles produced from iron nitrate by liquid flame spray with a dual oxygen flowcitations
- 2016Microstructural and abrasion wear characteristics of laser-clad tool steel coatingscitations
- 2015Enhanced photoactive and photoelectrochemical properties of TiO2 sol-gel coated steel by the application of SiO2 intermediate layercitations
- 2012High temperature oxidation behaviour of MNCO2O4 coating on crofer 22 APU manufactured by a novel solution precursor plasma spray process (SPPS)citations
- 2012High surface area nanostructured tubes prepared by dissolution of ALD-coated electrospun fiberscitations
- 2011Manganese-cobalt spinel coatings for SOFC metallic interconnects manufactured by conventional plasma spraying (PS) and suspension plasma spraying (SPS)citations
Places of action
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article
Enhanced photoactive and photoelectrochemical properties of TiO2 sol-gel coated steel by the application of SiO2 intermediate layer
Abstract
<p>Photocatalysis is a promising solution for purifying air and water from pollutants, yet more efficient photocatalytic materials are needed. A new approach is proposed in this paper for enhancing the photoactive and photoelectrical properties of anatase TiO<sub>2</sub> films by applying an intermediate SiO<sub>2</sub> film between the TiO<sub>2</sub> film and the stainless steel substrate. TiO<sub>2</sub> and SiO<sub>2</sub> coatings are synthesized by a sol-gel method and the thickness of TiO<sub>2</sub> film is varied in order to obtain improved understanding on the role of thickness in photocatalytic and electrochemical performance. The obtained coatings are systematically characterized in terms of microstructure using such techniques as field-emission scanning electron microscopy (FE-SEM), Raman spectroscopy and X-ray diffraction (XRD), that demonstrate, e.g., the anatase phase structure of the TiO<sub>2</sub> films. The enhanced photocatalytic properties of SiO<sub>2</sub>/TiO<sub>2</sub> coatings as compared to TiO<sub>2</sub> films are verified using methylene blue (MB) discoloration tests, while the improved photoelectrochemical properties are shown by potentiodynamic i-V scans, open circuit potential (OCP) monitoring and electrochemical impedance spectroscopy (EIS). We attribute the beneficial effect of the intermediate SiO<sub>2</sub> film on the photocatalytic and photoelectrochemical performance to the high electrical resistance of the SiO<sub>2</sub> that imposes a high-energy barrier for electron transfer and, therefore, (partly) insulates the TiO<sub>2</sub> film from the substrate and acts as a capacitor for photo-generated electrons under illumination. The presented results show an effective way of enhancing the photocatalytic performance of anatase TiO<sub>2</sub> films.</p>