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Oxidative thermal conversion of hydrothermal derived precursors toward the mixed-metal cobaltite spinel oxides (Znco2o4 and nico2o4): In-situ investigation by synchrotron-radiation xrd and xas techniques
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Document Title
Oxidative thermal conversion of hydrothermal derived precursors toward the mixed-metal cobaltite spinel oxides (Znco2o4 and nico2o4): In-situ investigation by synchrotron-radiation xrd and xas techniques
Author
Deeloed W., Hanlumyuang Y., Limphirat W., Suramitr S., Chansaenpak K., Kanjanaboos P., Wannapaiboon S., Wattanathana W.
Name from Authors Collection
Affiliations
Department of Chemistry, Faculty of Science, Kasetsart University, Bangkok, 10900, Thailand; Department of Materials Engineering, Faculty of Engineering, Kasetsart University, Bangkok, 10900, Thailand; Synchrotron Light Research Institute, 111 University Avenue, Suranaree, Muang, Nakhon Ratchasima, 30000, Thailand; National Nanotechnology Center, National Science and Technology Development Agency, Thailand Science Park, Khlong Luang, 12120, Thailand; School of Materials Science and Innovation, Faculty of Science, Mahidol University, Nakhon Pathom, 73170, Thailand
Type
Article
Source Title
Crystals
ISSN
20734352
Year
2021
Volume
11
Issue
10
Open Access
Gold
Publisher
MDPI
DOI
10.3390/cryst11101256
Abstract
In-situ investigations of structural transitions during the thermal-oxidative event of mixedmetal spinel oxide precursors, the so-called nickel-(NCO) and zinc-containing (ZCO) cobaltite spinel precursors, were investigated to understand the formations of the derived NiCo2O4 and ZnCo2O4 spinel oxides, respectively. In-situ XRD investigation revealed that emerged temperatures for spinel oxide phase were between 325 and 400◦C, depending on the cationic substituent. It indicated that the emerged temperature correlated with the absolute octahedral site preference energy (OSPE) of those cations that participated in the development of the spinel framework. Moreover, the incorporated nickel and zinc in the precursors was beneficial for inhibiting the occurrence of the undesired CoO phase. Time-resolved X-ray absorption spectroscopic (TRXAS) data suggested the local structure rearrangement of nickel and zinc throughout the calcination process, which differed from the behavior of single-metal cobalt system. The essential information reported herein provides a benefit to control the cationic distribution within spinel materials, leading to the tunable physical and chemical properties. © 2021 by the authors. Licensee MDPI, Basel, Switzerland.
Funding Sponsor
Synchrotron Light Research Institute
License
CC BY
Rights
Author
Publication Source
Scopus