Journal
INTERNATIONAL JOURNAL OF ELECTROCHEMICAL SCIENCE
Volume 16, Issue 6, Pages -Publisher
ESG
DOI: 10.20964/2021.06.65
Keywords
TiO2 nanotube arrays; Fe-doped; Photoelectrochemical; EIS; DFT calculations
Categories
Funding
- Natural Science Foundation of Shandong Province of China [ZR2016BP11, ZR2018LE002]
- Project of Shandong Province Higher Educational Science [J16LC18]
- Science Research Fund of Binzhou University [2014Y19]
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The Fe-doped TiO2 nanotube array films were prepared and characterized for their photoelectrochemical properties, with 0.1M Fe-doped samples showing the highest photocurrent value and excellent activity. DFT calculations were also conducted to confirm the effects of Fe3+ ions on redshifting the absorption edge and changes in the bandgap.
Fe-doped TiO2 nanotube array (Fe-TiO2 TNTA) films are produced by a simple and facile anodization method on Ti foil substrates. The Fe-doped TNTA films were characterized by SEM, Raman, XPS and UV-vis spectrum. The result showed that the absorption edge generated bathochromic shift. Raman and XPS reveal that Ti4+ ions were uniformly substituted by Fe3+ ions or Ti-O-Fe bonds. After comparing different Fe3+ ions concentrations, 0.1M Fe-doped TiO2 samples exhibite the highest photocurrent value, indicating super photoelectrochemical activity. The difference between the photocathodic protection properties of TNTA films and Fe-doped TNTA films is also investigated. The The density functional theory (DFT) calculation is carried out to confirm the effects of the Fe3+ ions on the absorption edge redshift and the bandgap changes.
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