Facile Synthesis and Characterization of Pure Tochilinite‐like Materials from Nanoparticulate FeS

In this work, three different tochilinite‐like materials have been obtained by sophisticated synthetic methods that allow to control the distribution of iron ions. The purity of the samples was confirmed by powder X‐ray diffraction. From elemental analysis and Mössbauer spectroscopy data, detailed c...

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Vydáno v:Zeitschrift für anorganische und allgemeine Chemie (1950) Ročník 648; číslo 23
Hlavní autoři: Bolney, Robert, Grosch, Mario, Winkler, Mario, Slageren, Joris, Weigand, Wolfgang, Robl, Christian
Médium: Journal Article
Jazyk:angličtina
Vydáno: Weinheim Wiley Subscription Services, Inc 13.12.2022
Témata:
carbonaceous chondrites
Composition
Iron
iron sulfide
Layered hybrid materials
Mossbauer spectroscopy
nanotubes
Oxidation
Stability analysis
Synthesis
Thermal stability
Tochilinite
ISSN:0044-2313, 1521-3749
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Shrnutí:In this work, three different tochilinite‐like materials have been obtained by sophisticated synthetic methods that allow to control the distribution of iron ions. The purity of the samples was confirmed by powder X‐ray diffraction. From elemental analysis and Mössbauer spectroscopy data, detailed compositions could be determined: T1) Fe0.76S*0.86 [Fe2+0.01Fe3+0.56Mg2+0.43(OH)2.01]; T2) Fe0.89S*0.85 [Fe2+0.55Fe3+0.11Al3+0.33(OH)1.84(O)0.16]; T3) Fe0.71S*0.79 [Fe2+0.25Fe3+0.73Mg2+0.01Al3+0.01(OH)1.98(O)0.02]. These compositions fit to typical compositions of tochilinite in regard of the amount of iron vacancies and the volume ratio of the hydroxide layers to the sulfide layers. Besides hydroxide ions, oxide ions are also present in the hydroxide layers as a result of surface oxidation after the synthesis due to the high reactivity of the particles. TEM and SEM investigations show that the obtained powders consist mainly of thin sheets accompanied by nanotubes with BET surface areas ranging between 20 m2/g and 40 m2/g. The thermal stability was investigated by TGA and DSC analysis and it depends significantly on the composition.
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content type line 14
ISSN:0044-2313
1521-3749
DOI:10.1002/zaac.202200219