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- Title
Band Gap Narrowing of Orthorhombic Sodium Tantalate by Iron Doping and Photocatalytic Hydrogen Evolution by Water Splitting.
- Authors
Armendariz, S. F.; Herrera-Perez, Guillermo M.; Zaragoza-Galan, Gerardo
- Abstract
In this work we have narrowed the band gap of orthorhombic sodium tantalate by doping the perovskite structure with 5 and 10% of iron. The hydrothermal method was used in the preparation of the samples. Moreover, the evolution of hydrogen by photocatalytic water splitting is reported for first time for orthorhombic NaTaO3 mono-doped with Fe. The band gap was reduced from 4.08 to 3.24 eV for sodium tantalate doped with 5% of Fe, and up to 2.05 eV for the perovskite doped with 10% of Fe. The highest photocatalytic activity was obtained with the semiconductor that had 5% of Fe. Which was attributable to its smaller particle size, larger specific surface area and lower recombination of electron–hole pairs in contrast with the sample that had 10% of Fe. X-ray diffraction, energy dispersive X-ray spectroscopy, transmission electron microscopy, nitrogen physisorption, ultraviolet–visible diffuse reflectance and photoluminescence spectroscopies were used to analyze the perovskite materials.
- Subjects
BAND gaps; ENERGY dispersive X-ray spectroscopy; IRON; ELECTRON-hole recombination; SODIUM; TRANSMISSION electron microscopy; SOLAR cells
- Publication
Catalysis Letters, 2024, Vol 154, Issue 7, p3236
- ISSN
1011-372X
- Publication type
Article
- DOI
10.1007/s10562-023-04546-1