Reaction Behavior of Sm and Valence State Evolution of Sm3+ During the Reduction of SmF3 DOI Open Access
D. Liu,

Y.W. Ye,

Guanjin Li

et al.

Processes, Journal Year: 2025, Volume and Issue: 13(4), P. 1040 - 1040

Published: March 31, 2025

SmF3 cannot be reduced to metallic samarium by aluminum due variable valence states of Sm. This study investigates the reduction products via an aluminothermic reduction. The effect molar ratios Al/SmF3 on morphology, elemental distribution, crystal structure, and chemical samples were investigated scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDS), diffraction (XRD), photoelectron (XPS). thermodynamic results show that it is feasible for Al form SmF2 in 933~1356 K. SmF2.413, AlF3, Sm(AlF)5 are obtained under condition ratio at 1:3, 2:3, 3:3, 4:3, 5:3. exhibits mixed Sm3+ Sm2+, with δ F Sm determined a(δ) = −0.1794δ + 5.819 (0 ≤ 0.4615). presence adsorbed oxygen facilitates oxidation process from Sm2+ Sm3+. These findings may provide a theoretical basis development other rare earth elements

Language: Английский

Ion‐imprinted chelating resin for targeted adsorption of lanthanum ions: synthesis, characterization, and application DOI Open Access
Rua B. Alnoman

Journal of Chemical Technology & Biotechnology, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 7, 2025

Abstract BACKGROUND Lanthanum ions (La 3+ ) are of great importance in many applications, so development effective sorbents for selective recovery La is urgently required. In this work, an ion‐imprinted polymeric sorbent La‐RSPY with secondary amine, phenolic, and pyridyl groups was synthesized through a Schiff base reaction between 4‐aminoresorcinol pyridine‐2‐carboxaldehyde, followed by reduction, complexation, base‐catalyzed polymerization resorcinol/formaldehyde. RESULTS showed impressive selectivity to from competitive like Gd , Ru Pr Eu Nd Cd 2+ Zn Cu mixed‐ion systems adsorption capacity 200 ± 1 mg g −1 . Its behavior successfully modeled using the Sips isotherm, while pseudo‐second‐order kinetics further confirmed efficiency process. Spectroscopic analysis NMR, FTIR, SEM also that integrity unaffected. Such better performance due CN, NH, OH give rise stable complexes imprinted spatial configurations tailored binding. CONCLUSION has promise applications analytical chemistry, food safety, wastewater treatment, environmental remediation. Scaling up synthesis, optimizing processes, collaboration industries specializing rare earth or water treatment would increase its practical deployment widen commercial circle. © 2025 Society Chemical Industry (SCI).

Language: Английский

Citations

0
Reaction Behavior of Sm and Valence State Evolution of Sm3+ During the Reduction of SmF3 DOI Open Access
D. Liu,

Y.W. Ye,

Guanjin Li

et al.

Processes, Journal Year: 2025, Volume and Issue: 13(4), P. 1040 - 1040

Published: March 31, 2025

SmF3 cannot be reduced to metallic samarium by aluminum due variable valence states of Sm. This study investigates the reduction products via an aluminothermic reduction. The effect molar ratios Al/SmF3 on morphology, elemental distribution, crystal structure, and chemical samples were investigated scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDS), diffraction (XRD), photoelectron (XPS). thermodynamic results show that it is feasible for Al form SmF2 in 933~1356 K. SmF2.413, AlF3, Sm(AlF)5 are obtained under condition ratio at 1:3, 2:3, 3:3, 4:3, 5:3. exhibits mixed Sm3+ Sm2+, with δ F Sm determined a(δ) = −0.1794δ + 5.819 (0 ≤ 0.4615). presence adsorbed oxygen facilitates oxidation process from Sm2+ Sm3+. These findings may provide a theoretical basis development other rare earth elements

Language: Английский

Citations

0