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From spent alkaline batteries to Zn_xMn_3__xO_4 by_xO4 by a hydrometallurgical route: synthesis and characterization

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Alcaraz Romo, Lorena y Lopez Fernandez, Ana y García Díaz, Irene y Fernández Sánchez, Paloma y Urbieta Quiroga, Ana Irene y López, Félix A. (2018) From spent alkaline batteries to Zn_xMn_3__xO_4 by_xO4 by a hydrometallurgical route: synthesis and characterization. RSC advances, 8 (58). pp. 33496-33505. ISSN 2046-2069

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URL Oficial: http://dx.doi.org/10.1039/c8ra06789a


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A series of Zn/Mn binary oxides with different molar ratios (1.4-11) were synthesized via co-precipitation from a solution obtained through the acidic (HCl) leaching of a black mass originating from the mechanical recycling of spent alkaline and Zn-C batteries. The oxides obtained were characterized by X-ray diffraction (XRD), Fourier-transform infrared spectroscopy (FTIR), X-ray photoelectron spectroscopy (XPS), and Raman spectroscopy. Magnetic properties of the samples were also investigated. The Raman spectroscopy results showed all the binary metallic oxides belong to the ZnxMn3-xO4 (0.25 <= x >= 1.75) type. All showed a spinel crystalline structure. The saturation magnetization decreases with the Zn_xMn_3_xO_4 (0.25 # x $ 1.75) type. All showed a spinel crystalline structure. The saturation magnetization decreases with the Zn/Mn molar ratio; a maximum of 13.19 emu g__1 was found for the molar ratio of 11 at the Curie temperature (25.5 K). XPS showed that all the synthesized compounds contained Mn_2_+, Mn_3_+ and Mn4+. Mn_2_+ was the most prominent at a molar ratio of 11, Mn_3_+ was most common at a molar ratio of 2, and Mn_4_+ at 1.4.


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© The Royal Society of Chemistry 2018.
Lorena Alcaraz was funded by the Comunidad de Madrid vía a Postdoctoral Grant (Ref. PEJD-2016/AMN-2314) contract co-nanced by the European Social Fund. Ana López Fernández was funded by the Comunidad de Madrid vía a Junior Technical Grant (Ref. PEJ15/AMB/Al-0049) contract co-financed by the European Social Fund. This work has been partially supported by MINECO/FEDER (MAT2015-65274-R).

Palabras clave:Lithium-Ion batteries; Room-temperature ferromagnetism; Ray photoelectron-spectroscopy; Mn-Doped Zno; Anode material; Zinc-carbon; Supercapacitor applications; Photocatalytic degradation; Electron-spectroscopy; Mn3o4 nanoparticles
Materias:Ciencias > Física > Física de materiales
Código ID:50436
Depositado:20 Dic 2018 19:32
Última Modificación:08 Ene 2019 09:38

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