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This study improves the hydrothermal synthesis of ZnAl2O4 to realize direct bottom-up chemical synthesis from a liquid precursor solution. The liquid solution was prepared by the organic ligand dissolution (OLD) method. Synthesized ZnAl2O4 was identified as a single phase comprising ZnAl2O4 with organic components speculated to work as surfactants that aid in size stabilization. The synthesized ZnAl2O4 product was observed to be in nanoparticle form, exhibiting a wide-bandgap attribute to the quantum size effect. The growth rate of ZnAl2O4 nanoparticles in the proposed method is low, and a series of results revealed the phase formation process of synthesized ZnAl2O4. This formation process seems common for chemically synthesized ZnAl2O4 and indicates the importance of compositional analysis in the study for chemical synthesis of this material. The application of the OLD method enables us to synthesize ZnAl2O4 across a wide pH range (3 ~ 11), and it is applicable to the continuous synthesis using a flow-type reaction system of hydrothermal reaction. Moreover, our technique is basically applicable to the synthesis of other spinel oxide. These characteristics of the OLD method are expected to extensively improve the investigation of chemical processing of spinel oxides.

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• In Copyright
  

  This version of the article has been accepted for publication, after peer review (when applicable) and is subject to Springer Nature’s AM terms of use, but is not the Version of Record and does not reflect post-acceptance improvements, or any corrections. The Version of Record is available online at: https://doi.org/10.1007/s10853-023-08866-w

Keyword: Hydrothermal Synthesis, Chemical Synthesis, Nanoparticle, ZnAl2O4, Spinel

Date published: 2023-08-27

Publisher: Springer Science and Business Media LLC

Journal:

• Journal of Materials Science (ISSN: 15734803) vol. 58 p. 13269-13278

Funding:

• Japan Society for the Promotion of Science 16K13999

Manuscript type: Author's version (Accepted manuscript)

MDR DOI: https://doi.org/10.48505/nims.5214

First published URL: https://doi.org/10.1007/s10853-023-08866-w

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Updated at: 2024-12-24 13:59:12 +0900

Published on MDR: 2024-12-24 13:59:13 +0900