Тип публикации: статья из журнала

Год издания: 2024

Идентификатор DOI: 10.1134/S0020168524701383

Ключевые слова: valleriite, Layered nanomaterials, hydrothermal synthesis, brucite, x-ray photoelectron spectroscopy, phase formation

Аннотация: This paper examines processes underlying the formation of layered materials, analogs of the natural mineral valleriite, CuFeS₂·1.53[(Mg,Al)(OH)₂], made up of alternating two-dimensional sulfide and hydroxide layers, under hydrothermal conditions. The synthesized materials have been characterized by X-ray diffraction, scanning and transmission electron microscopies, X-ray photoelectron spectroscopy, and laser diffraction. The results demonstrate that the formation of valleriite phase at 160°C in an autoclave proceeds through the formation and subsequent consumption of reaction intermediates: erdite (NaFeS₂·2H₂O), haycockite (Cu₄Fe₅S₈), and chalcopyrite (CuFeS₂). The formation of phase-pure valleriite has been shown to occur at a hydrothermal treatment time from 25 to 70 h, whereas shorter or longer treatment times lead to contamination of the reaction product with impurity phases. The nature of the anion in the starting materials (${\text{SO}}_{4}

Журнал: Inorganic Materials

Выпуск журнала: Т. 60, № 9

Номера страниц: 1063-1073

ISSN журнала: 00201685

Место издания: Moscow

Издатель: Pleiades Publishing, Ltd.

• Borisov R. V. (Siberian Federal University)
• Likhatski M. N. (Institute of Chemistry and Chemical Technology, Siberian Branch, Russian Academy of Sciences)
• Vorobyev S. A. (Siberian Federal University)
• Zhizhaev A. M. (Institute of Chemistry and Chemical Technology, Siberian Branch, Russian Academy of Sciences)
• Tomashevich E. V. (Institute of Chemistry and Chemical Technology, Siberian Branch, Russian Academy of Sciences)

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