Synthesis of Zn–Fe layered double hydroxides via an oxidation process and structural analysis of products

The synthesis of Zn–Fe(III) layered double hydroxides was attempted, employing different pathways using either Fe(II) or Fe(III) species together with Zn as the initial reagents. The product derived from the synthesis employing Fe(II) was found to transition to a Zn–Fe(III) layered double hydroxides...

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Bibliographic Details
Published in:Journal of solid state chemistry 2015-08, Vol.228, p.221-225
Main Authors: Morimoto, Kazuya, Tamura, Kenji, Anraku, Sohtaro, Sato, Tsutomu, Suzuki, Masaya, Yamada, Hirohisa
Format: Article
Language:English
Subjects:
ATOMIC RADII
ELECTRONEGATIVITY
Hydrotalcite-like compounds
INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY
Iron
IRON HYDROXIDES
IRON IONS
Layered double hydroxides
LAYERS
OXIDATION
Oxidation process
STRUCTURAL CHEMICAL ANALYSIS
SYNTHESIS
VALENCE
Zinc
ZINC COMPOUNDS
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Summary:The synthesis of Zn–Fe(III) layered double hydroxides was attempted, employing different pathways using either Fe(II) or Fe(III) species together with Zn as the initial reagents. The product derived from the synthesis employing Fe(II) was found to transition to a Zn–Fe(III) layered double hydroxides phase following oxidation process. In contrast, the product obtained with Fe(III) did not contain a layered double hydroxides phase, but rather consisted of simonkolleite and hydrous ferric oxide. It was determined that the valency of the Fe reagent used in the initial synthesis affected the generation of the layered double hydroxides phase. Fe(II) species have ionic radii and electronegativities similar to those of Zn, and therefore are more likely to form trioctahedral hydroxide layers with Zn species. The synthesis of Zn–Fe(III) layered double hydroxides was attempted, employing different pathways using either Fe(II) or Fe(III) species together with Zn as the initial reagents. [Display omitted] •Iron valency affected the generation of Zn–Fe layered double hydroxides.•Zn–Fe layered double hydroxides were successfully synthesized using Fe(II).•Fe(II) species were likely to form trioctahedral hydroxide layers with Zn species.
ISSN:0022-4596
1095-726X
DOI:10.1016/j.jssc.2015.04.045