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

Josué M Gonçalves; Alireza Ghorbani; Timothy G Ritter; Irlan S Lima; Mahmoud Tamadoni Saray; Abhijit H Phakatkar; Vinicius D Silva; Rafael S Pereira; Alexander L Yarin; Lúcio Angnes; Reza Shahbazian-Yassar

doi:10.1016/j.jcis.2023.03.089

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

J Colloid Interface Sci. 2023 Jul:641:643-652. doi: 10.1016/j.jcis.2023.03.089. Epub 2023 Mar 17.

Affiliations

¹ Department of Mechanical &Industrial Engineering, University of Illinois at Chicago, Chicago, IL 60607, USA; Instituto de Química, Universidade de São Paulo, Av. Prof. Lineu Prestes 748, 05508-000 São Paulo-SP, Brazil. Electronic address: rsyassar@uic.edu.
² Department of Mechanical &Industrial Engineering, University of Illinois at Chicago, Chicago, IL 60607, USA.
³ Department of Civil & Materials Engineering, University of Illinois at Chicago, Chicago, IL 60607, USA.
⁴ Instituto de Química, Universidade de São Paulo, Av. Prof. Lineu Prestes 748, 05508-000 São Paulo-SP, Brazil.
⁵ Department of Biomedical Engineering, University of Illinois at Chicago, Chicago, IL 60607, USA.
⁶ Centro de Engenharia, Modelagem e Ciências Sociais Aplicadas, Universidade Federal do ABC, 09210-580 Santo André, SP, Brazil.
⁷ Department of Mechanical &Industrial Engineering, University of Illinois at Chicago, Chicago, IL 60607, USA. Electronic address: josuefisicoquimico@hotmail.com.

PMID: 36963257
DOI: 10.1016/j.jcis.2023.03.089

Abstract

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 precursors 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 °C, while the annealing process at 400 °C led to a low-crystallinity spinel phase without phase segregation. Overall, this work describes HE-Gly as a new precursor for altering the composition, crystallinity, and porosity of HEOs. This strategy is scalable for potential high mass productions, paving a new path toward industrial application of high-entropy materials.

Keywords: High-Entropy Coordination Compound; High-Entropy Metal-Glycerolate; High-Entropy Oxides; Spinel Phase.