Enhanced visible light photoelectrochemical water splitting using nanotubular FeOx-TiO2 annealed at different temperatures
| Autor: | Monika Sołtys-Mróz, Kamilla Malek, Grzegorz D. Sulka, Steinar Raaen, Karolina Syrek, Ewelina Wiercigroch, Krzysztof Rokosz |
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| Rok vydání: | 2021 |
| Předmět: |
Anatase
Materials science Diffuse reflectance infrared fourier transform Renewable Energy Sustainability and the Environment Band gap Energy-dispersive X-ray spectroscopy Energy Engineering and Power Technology Dielectric spectroscopy symbols.namesake Chemical engineering X-ray photoelectron spectroscopy symbols Water splitting Electrical and Electronic Engineering Physical and Theoretical Chemistry Raman spectroscopy |
| Zdroj: | Journal of Power Sources. 507:230274 |
| ISSN: | 0378-7753 |
| Popis: | Nanostructured semiconductor photoelectrodes that can operate under renewable solar energy are of great interest for both fundamental studies and practical applications. In this paper, we studied the semiconducting and photoelectrochemical properties of nanotubular FeOx-TiO2 annealed at different temperatures. Nanostructured anodic titanium oxide layers were modified by impregnation with a solution containing 100 mM FeCl3 followed by their annealing at 400 °C, 500 °C, and 600 °C. The synthesized materials were characterized by using a field emission scanning electron microscopy (FE-SEM), energy dispersive spectroscopy (EDS), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), Raman spectroscopy (RS), diffuse reflectance spectroscopy (DRS), electrochemical impedance spectroscopy (EIS), Mott-Schottky analysis, and photoelectrochemical measurements. It was found that depending on the annealing temperature, the studied materials showed a different photoelectrochemical response. The lowest value of band gap was observed for the sample annealed at 500 °C, which is related to the presence of a mixture of anatase and rutile phases together with iron oxides. |
| Databáze: | OpenAIRE |
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