Alcaraz Romo, LorenaGarcía Díaz, IreneGonzález, LauraRabanal, María EugeniaUrbieta Quiroga, Ana IreneFernández, PalomaLópez, Félix A.2023-06-172023-06-172019-062238-785410.1016/j.jmrt.2019.04.020https://hdl.handle.net/20.500.14352/13591©2019 The Authors. Published by Elsevier B.V.Several phases with variable stoichiometry ZnxMn3-xO4 (with x = 0.25, 0.85 and 1) and ZnO have been obtained from the black mass, a widely generated residue of wasted alkaline batteries. The obtained samples have been characterized by X-ray diffraction (XRD) and Raman spectroscopy showing results consistent with the stoichiometry obtained from chemical analysis. The study of the degradation of methylene blue (MB) and rhodamine B (RhB) under UV radiation demonstrates the photocatalytic behavior in all samples obtained, reaching degradation percentages higher than 70% and 50%, respectively.engAtribución-NoComercial-SinDerivadas 3.0 Españahttps://creativecommons.org/licenses/by-nc-nd/3.0/es/journal articlehttp://dx.doi.org/10.1016/j.jmrt.2019.04.020https://www.sciencedirect.comopen access538.9Surface optical phononsZnoManganeseNanoparticlesDegradationRamanSolarZincDyesSpent batteriesPhotocatalytic materialsZn and Mn oxidesMethylene blueRhodamine BFísica de materialesFísica del estado sólido2211 Física del Estado Sólido