Multimetallic glycerolate as a precursor template of spherical porous high-entropy oxide microparticles

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Goncalves, Josue M. ; Ghorbani, Alireza ; Ritter, Timothy G. ; Lima, Irlan S. ; Saray, Mahmoud Tamadoni ; Phakatkar, Abhijit H. ; Silva, Vinicius D. ; Pereira, Rafael S. ; Yarin, Alexander L. ; Angnes, Lucio ; Shahbazian-Yassar, Reza

• Tipo de documento: Artigo Científico
• Fonte: Journal of Colloid and Interface Science; v. 641, p. 10-pg., 2023-03-22.

Resumo

High-entropy materials have received notable attention concern on account of their unique structure, tunable properties, and unprecedented potential applications in many fields. In this work, for the first time a NiCoMnZnMg-containing high-entropy glycerolate (HE-Gly) particles has been synthesized using a scalable solvothermal method. The HE-Gly particles were used as a precursor in design of porous high -entropy oxide (HEO) microparticles. The morphological and structural characterizations demonstrate that the temperature of the annealing process, and the composition of the metal ions in the HE-Gly pre-cursors play important roles in determining porosity, crystallinity, and phase separation in HEOs. In fact, HE-Gly exhibited a porous structure of spinel HEOs with secreted MgO phase after annealing process at 800 degrees C, while the annealing process at 400 degrees C led to a low-crystallinity spinel phase without phase seg-regation. Overall, this work describes HE-Gly as a new precursor for altering the composition, crys-tallinity, and porosity of HEOs. This strategy is scalable for potential high mass productions, paving a new path toward industrial application of high-entropy materials.(c) 2023 Elsevier Inc. All rights reserved. (AU)

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