Controlled morphology synthesis of nanostructured β-AlF3– x(OH)x with tunable specific surface area

Autor: Stéphanie Kodjikian, Jean Louis Bobet, Jérôme Lhoste, Amandine Guiet, Monique Body, Romain Moury, Marc Leblanc, Christophe Legein, Franck Fayon, Vincent Maisonneuve, Valentine Camus-Génot
Přispěvatelé: Institut des Molécules et Matériaux du Mans (IMMM), Le Mans Université (UM)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Conditions Extrêmes et Matériaux : Haute Température et Irradiation (CEMHTI), Centre National de la Recherche Scientifique (CNRS)-Institut de Chimie du CNRS (INC)-Université d'Orléans (UO), Optique et microscopies (POM), Institut Néel (NEEL), Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP ), Université Grenoble Alpes (UGA)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP ), Université Grenoble Alpes (UGA), Institut de Chimie de la Matière Condensée de Bordeaux (ICMCB), Université de Bordeaux (UB)-Institut Polytechnique de Bordeaux-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Le Mans Université (V. Camus-Génot) for doctoral grants and the Région des Pays de la Loire (J. Lhoste, Gis-Perle project). Thanks are also due to the Université Bretagne Loire, University of Le Mans, and to ANR Programme National de Recherche—OPIFCAT for the postdoctoral grant of R. Moury. The authors gratefully acknowledge the 'X-ray Diffusion and Diffraction' and the 'Electron Microscopy' technical platforms of IMMM (Le Mans University). Financial support from the TGIR-RMN-THC FR3050 CNRS for conducting the solid-state NMR experiments is gratefully acknowledged. DFT computations have been performed at the 'Centre de Calcul Scientifique en Région Centre' facility (CCRS, Orléans, France) under the CASCIMODOT program. The authors also thank Alain Jouanneaux (IMMM) for help for the DoE., ANR-20-CE08-0026,OPIFCat,Fluorures inorganiques poreux ordonnés comme catalyseurs hétérogènes efficients(2020)
Jazyk: angličtina
Rok vydání: 2021
Předmět:
Zdroj: Crystal Growth & Design
Crystal Growth & Design, American Chemical Society, 2021, 21 (10), pp.5914-5927. ⟨10.1021/acs.cgd.1c00808⟩
ISSN: 1528-7483
1528-7505
DOI: 10.1021/acs.cgd.1c00808⟩
Popis: International audience; 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.
Databáze: OpenAIRE
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