Effect of magnesium ferrite doping with lanthanide ions on dark-, visible- and UV-driven methylene blue degradation on heterogeneous Fenton-like catalysts
Ivanets, Andrei; Prozorovich, Vladimir; Sarkisov, Valentin; Roshchina, Marina; Grigoraviciute-Puroniene, Inga; Zarkov, Aleksej; Kareiva, Aivaras; Masindi, Vhahangwele; Wang, Chongqing; Srivastava, Varsha; Sillanpää, Mika (2021-07-16)
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, 47(21), 29786–29794. https://doi.org/10.1016/j.ceramint.2021.07.150
© 2021. Elsevier Ltd and Techna Group S.r.l. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/.
https://creativecommons.org/licenses/by-nc-nd/4.0/
https://urn.fi/URN:NBN:fi-fe2021081643305
Tiivistelmä
Abstract
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.
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