M(II)-Al-Fe layered double hydroxides synthesized from aluminum saline slag wastes and catalytic performance on cyclooctene oxidation
Fecha
2022Autor
Versión
Acceso abierto / Sarbide irekia
Tipo
Artículo / Artikulua
Versión
Versión publicada / Argitaratu den bertsioa
Identificador del proyecto
Impacto
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10.1016/j.mineng.2022.107516
Resumen
Aluminum was extracted from saline slags via an alkaline method and employed in the synthesis of Layered Double Hydroxides (LDH) with various M2+ cations (Co, Mg, Ni and Zn), while Al and Fe were the M3+ cations, using the co-precipitation method and a M2+/M3+ 2:1 ratio. The structural characterization of the samples was performed with powder X-ray diffraction (PXRD), scanning electron microscopy ...
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Aluminum was extracted from saline slags via an alkaline method and employed in the synthesis of Layered Double Hydroxides (LDH) with various M2+ cations (Co, Mg, Ni and Zn), while Al and Fe were the M3+ cations, using the co-precipitation method and a M2+/M3+ 2:1 ratio. The structural characterization of the samples was performed with powder X-ray diffraction (PXRD), scanning electron microscopy (SEM), nitrogen physisorption at 77 K, thermogravimetric analysis (TGA), temperature-programmed reduction (TPR) and X-ray photoelectron spectroscopy (XPS). Their catalytic performance was tested for the oxidation of olefins (cyclooctene) and their biomimetic potential was analyzed. Results show a great selectivity towards epoxides with no other products obtained. Reaction yields followed the descending order Co4AlFe, Zn4AlFe, Ni4AlFe, and Mg4AlFe, the sample
with cobalt as M2+ converting up to 85% of cyclooctene. [--]
Materias
Aluminum industrial wastes,
Hydrotalcite,
Iodosylbenzene,
Saline slags,
(Z)-cyclooctene oxidation
Editor
Elsevier
Publicado en
Minerals Engineering, 180 (2022) 107516
Departamento
Universidad Pública de Navarra/Nafarroako Unibertsitate Publikoa. Institute for Advanced Materials and Mathematics - INAMAT2
Versión del editor
Entidades Financiadoras
This work was funded by the Spanish Ministry of Science and Innovation (MCIN/AEI/10.13039/501100011033) through project
PID2020-112656RB-C21. The Brazilian authors thank Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq) and the Brazilian research funding agency Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP) (2020/06712-6). Open access funding provided by Universidad Pública de Navarra. LS thanks the Universidad Pública de Navarra for a post-doctoral grant. AG also thanks Banco Santander for funding through the Research Intensification Program.