| Title | SPIONs doped with cobalt from the Li-ion battery acid leaching waste as a photocatalyst for tetracycline degradation - synthesis, characterization, DFT studies, and antibiotic treatment |
|---|---|
| ID_Doc | 64852 |
| Authors | Pietrzyk-Thel, P; Osial, M; Pregowska, A; Abramowicz, M; Nguyen, TP; Urbanska, W; Giersig, M |
| Title | SPIONs doped with cobalt from the Li-ion battery acid leaching waste as a photocatalyst for tetracycline degradation - synthesis, characterization, DFT studies, and antibiotic treatment |
| Year | 2023 |
| Published | |
| Abstract | This work demonstrates the removal of cobalt-containing liquid waste recovered from spent lithium-ion battery waste in the context of the synthesis of superparamagnetic particles and their application for tetracycline photodegradation. First, the spent lithium-ion battery waste was treated with H2SO4, glutaric acid and H2O2 to release heavy material from the graphite electrodes, and then the post-acid leaching solution was used as a source of Co2+ ions in the wet co-precipitation synthesis of superparamagnetic co-doped iron oxide nanoparticles. Scanning electron microscopy and transmission electron microscopy revealed the spherical morphology of nanoparticles with a size of 15 +/- 4.80 nm. Fourier-transform infrared spectroscopy and X-ray diffraction confirmed the formation of iron oxide doped with Co, while the particles obtained have a polycrystalline structure. Magnetometric measurements prove the superparamagnetic properties of the obtained material with saturation magnetization (Ms) of about 91 emu/g. The band gap energy estimated from Tauc plot for obtained nanoparticles is about 1.6 eV, while the flat band potential calculated from Mott-Schottky's plot is about -0.18 V vs. SHE. The experimental studies conducted with UV-Vis show the highest efficacy in pH 7 degradation of tetracycline (TC) of about similar to 84.42%, with the process undergoing first-order kinetics. The addition of H2O2 improves the effectiveness to reach about 92.2% TC degradation. It turned out that magnetic nanoparticles from waste battery waste have catalytic properties and can be considered efficient catalysts in various fields, can be easily removed from aqueous media after effective treatment. |
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