Microstructured layered-kagome BaCo 3 (VO 4 ) 2 (OH) 2 with variable crystallite size: alternative synthetic route and comparison with nanostructured samples - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Dalton Transactions Année : 2023

Microstructured layered-kagome BaCo 3 (VO 4 ) 2 (OH) 2 with variable crystallite size: alternative synthetic route and comparison with nanostructured samples

Résumé

Microplatelets of the layered-kagome compound BaCo3(VO4)(2)(OH)(2), which is the Co2+ analogue of mineral vesignieite BaCu3(VO4)(2)(OH)(2), have been prepared with very high yield by hydrothermal reaction using synthetic karpenkoite Co3V2O7(OH)(2)center dot 2H(2)O as starting reagent. The Rietveld refinement of X-ray diffraction data indicates that Co3V2O7(OH)(2)center dot 2H(2)O is isostructural with martyite Zn3V2O7(OH)(2)center dot 2H(2)O. Two single-phased samples of microstructured BaCo3(VO4)(2)(OH)(2) have been characterized using powder X-ray diffraction, FT-IR and Raman spectroscopies, thermal analyses, scanning electron microscopy, energy-dispersive X-ray spectroscopy and magnetisation measurements. Their crystallite sizes perpendicular to the c-axis are in the range of 92(3) to 146(6) nm and depend on the synthesis conditions. Results have been compared to those previously obtained for quasi-spherical nanoparticles having a crystallite size of the order of 20 nm, to explore the effect of the crystallite size on the properties of BaCo3(VO4)(2)(OH)(2). This study highlights that the magnetic properties depend on the crystallite sizes only at low temperatures.

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Chimie
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hal-04039567 , version 1 (21-03-2023)

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Bachchar Hadrane, Philippe Deniard, Cassandre Jeannot, Isabelle Trenque, Rémi Dessapt, et al.. Microstructured layered-kagome BaCo 3 (VO 4 ) 2 (OH) 2 with variable crystallite size: alternative synthetic route and comparison with nanostructured samples. Dalton Transactions, 2023, 52 (11), pp.3501-3507. ⟨10.1039/d2dt04110c⟩. ⟨hal-04039567⟩
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