| Autor: |
Helfi, Kh., Mousavi Ghahfarokhi, S. E., Zargar Shoushtari, M. |
| Předmět: |
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| Zdroj: |
Applied Physics A: Materials Science & Processing; Jan2023, Vol. 129 Issue 1, p1-12, 12p, 1 Black and White Photograph, 3 Charts, 10 Graphs |
| Abstrakt: |
In this study, Bi1-xSmxFe1-yCryO3 (x = 0.0, 0.05, 0.1, y = 0.0, 0.01, 0.02, 0.03) nanostructures were prepared by hydrothermal method at 220 °C using the KOH concentration of 4 M during 6 h. X-ray diffraction analysis showed that the samples have a distorted rhombohedral perovskite structure with the symmetry of an R3c space group. The FT-IR spectrums of BiFeO3 and Bi1-xSmxFe1-yCryO3 are confirmed by the metal-oxide absorption bands that appeared at 400 cm−1–600 cm−1, which are the characteristic bands of FeO6 octahedral groups in the perovskite structure. FESEM images showed that the particle size has been decreased by doping the elements Sm and Cr. The magnetic properties of Bi1-xSmxFe1-yCryO3 have been improved compared to the undoped BiFeO3. The results of the magnetic properties showed that a maximum magnetization at 15 k Oe of BiFeO3 (0.148 emu/g) to Bi0.9Sm0.1Fe0.97Cr0.03O3 (1.895 emu/g) has been increased. The optical properties showed that the optical bandgap energy of samples with co-doping of Sm and Cr has been reduced from 2.8 to 2.1 eV. The results of PL analysis showed that the electron–hole recombination with an increase of the doping of Sm and Cr contents has been decreased which result in an effect on the photocatalytic performance. The Congo red (CR) degradation efficiency under visible light irradiation with increased co-doped Sm and Cr consents has been increased and the Congo red degradation rate followed the first-order Langmuir–Hinshelwood kinetics model. [ABSTRACT FROM AUTHOR] |
| Databáze: |
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