Effect of magnesium ferrite doping with lanthanide ions on dark-, visible- and UV-driven methylene blue degradation on heterogeneous Fenton-like catalysts
| Autor: | Mika Sillanpää, V. G. Prozorovich, Chongqing Wang, Vhahangwele Masindi, Andrei Ivanets, Aleksej Zarkov, Marina Roshchina, Inga Grigoraviciute-Puroniene, Varsha Srivastava, Aivaras Kareiva, Valentin Sarkisov |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Lanthanide
Materials science Magnesium Process Chemistry and Technology Doping chemistry.chemical_element Lanthanide ions doping Crystal structure Surfaces Coatings and Films Electronic Optical and Magnetic Materials Catalysis Mechanism catalytic chemistry.chemical_compound Reaction rate constant chemistry Methylene blue degradation Materials Chemistry Ceramics and Composites Heterogeneous Fenton-like catalysts Crystallite Magnesium ferrite Methylene blue Nuclear chemistry |
| Zdroj: | Ivanets, A, Prozorovich, V, Sarkisov, V, Roshchina, M, Grigoraviciute-Puroniene, I, Zarkov, A, Kareiva, A, Masindi, V, Wang, C, Srivastava, V & Sillanpää, M 2021, ' Effect of magnesium ferrite doping with lanthanide ions on dark-, visible-and UV-driven methylene blue degradation on heterogeneous Fenton-like catalysts ', Ceramics International, vol. 47, no. 21, pp. 29786-29794 . https://doi.org/10.1016/j.ceramint.2021.07.150 |
| DOI: | 10.1016/j.ceramint.2021.07.150 |
| Popis: | The catalytic behavior of magnesium ferrites doped with lanthanide ions (La3+, Ce3+, Sm3+, Gd3+, and Dy3+) on Methylene Blue (MB) degradation using Fenton process was studied. A slow increase in cubic Fd3m crystalline structure parameters and increase in crystallite size of doped samples magnesium ferrites were observed. A dramatic decrease in catalytic activity of catalysts obtained at 600 °C as compared to catalysts obtained at 300 °C was explicitly observed and this was grossly attributed to the elimination of surface hydroxyl groups as ascertained by FT-IR analysis. The initial magnesium ferrite demonstrated the highest catalytic activity under dark- (kˈ 0.0555 min−1) and visible-light (kˈ 0.1029 min−1) conditions. Catalytic efficiency of the lanthanides doped catalysts under UV-irradiation in accordance with the maximum appearance rate constant kˈ decreased in the following order Ce3+ > Dy3+ > La3+ ≈ MgFe2O4 > Sm3+ > Gd3+. The most active ferrites provided up to 99% of MB degradation in 60 and 20 min for visible- and UV-driven Fenton processes. Findings obtained from this study were observed to be competitive with other heterogeneous Fenton catalysts. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|