CAMUS-GÉNOT, Valentine; GUIET, Amandine; LHOSTE, Jérôme; FAYON, Franck; BODY, Monique; KODJIKIAN, Stéphanie; MOURY, Romain; LEBLANC, Marc; BOBET, Jean-Louis; LEGEIN, Christophe; MAISONNEUVE, Vincent

doi:10.1021/acs.cgd.1c00808

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CAMUS-GÉNOT, Valentine
Institut des Molécules et Matériaux du Mans [IMMM]

GUIET, Amandine
Institut des Molécules et Matériaux du Mans [IMMM]

LHOSTE, Jérôme
Institut des Molécules et Matériaux du Mans [IMMM]

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Article de revue

Ce document a été publié dans

Crystal Growth & Design. 2021-09-22, vol. 21, n° 10, p. 5914-5927

American Chemical Society

Résumé en anglais

In this work, the synthesis of β-AlF3–x(OH)x nanoparticles with very high specific surface area (SSA) using a microwave-assisted solvothermal process is reported. The influence of synthesis parameters on the morphology and SSA was investigated, and the nature of the solvent is shown to have the greatest impact. Five samples prepared using different solvent mixtures were deeply characterized by thermogravimetric analysis (TGA), N2 sorption, powder X-ray diffraction, transmission electron microscopy (TEM), and 19F and 27Al high-field solid-state NMR. Their SSAs range from 25 to 345 m2·g–1 with an associated OH content slightly increasing from ≈16% (AlF2.52(OH)0.48) to ≈19% (AlF2.42(OH)0.58), as estimated by TGA and 27Al high-field solid-state NMR. Compared to previous reference work [Dambournet, D., Chem. Mater. 2008, 204 1459−1469], β-AlF3–x(OH)x nanoparticles with SSAs up to 4 times larger were obtained. TEM revealed the formation of hollow nanostructures except when the surface exceeds 300 m2·g–1, in which case isolated nanoparticles are observed. The sample with the highest SSA also displaying an appealing cumulative pore volume of 0.060 cm3·g–1, its hydrogen adsorption capability was evaluated to show that β-AlF3–x(OH)x nanoparticles have a potential interest for hydrogen storage applications.< Réduire

Mots clés en anglais

Diffraction

Nanoparticles

Nuclear magnetic resonance spectroscopy

Solvents

Transmission electron microscopy

DOI

http://dx.doi.org/10.1021/acs.cgd.1c00808

Project ANR

Fluorures inorganiques poreux ordonnés comme catalyseurs hétérogènes efficients

Origine

Importé de hal

Unités de recherche

Institut de Chimie de la Matière Condensée de Bordeaux (ICMCB) - UMR 5026