Flexible fluorinated graphite foils with high contents of the (C 2 F) n phase for slow neutron reflectors.

Autor:	Henry K; Université Clermont Auvergne, ICCF, 24, avenue des Blaise Pascal, 63178 Aubière, France.; Université de Lorraine, CNRS, Institut Jean Lamour, UMR 7198, allée André Guinier, 54000 Nancy, France. sebastien.cahen@univ-lorraine.fr., Colin M; Université Clermont Auvergne, ICCF, 24, avenue des Blaise Pascal, 63178 Aubière, France., Chambery G; Université Clermont Auvergne, ICCF, 24, avenue des Blaise Pascal, 63178 Aubière, France., Vigolo B; Université de Lorraine, CNRS, Institut Jean Lamour, UMR 7198, allée André Guinier, 54000 Nancy, France. sebastien.cahen@univ-lorraine.fr., Cahen S; Université de Lorraine, CNRS, Institut Jean Lamour, UMR 7198, allée André Guinier, 54000 Nancy, France. sebastien.cahen@univ-lorraine.fr., Hérold C; Université de Lorraine, CNRS, Institut Jean Lamour, UMR 7198, allée André Guinier, 54000 Nancy, France. sebastien.cahen@univ-lorraine.fr., Nesvizhevsky V; Institut Max von Laue - Paul Langevin, 71 avenue des Martyrs, F-38042, Grenoble, France., Le Floch S; Institut Lumière Matière, UMR 5306, Université de Lyon, Université Claude Bernard Lyon1, CNRS, 10 rue Ada Byron, F-69622 Villeurbanne, France., Pischedda V; Institut Lumière Matière, UMR 5306, Université de Lyon, Université Claude Bernard Lyon1, CNRS, 10 rue Ada Byron, F-69622 Villeurbanne, France., Chen S; School of Environmental and Life Sciences, The University of Newcastle, Callaghan, New South Wales 2308, Australia., Dubois M; Université Clermont Auvergne, ICCF, 24, avenue des Blaise Pascal, 63178 Aubière, France.
Jazyk:	angličtina
Zdroj:	Dalton transactions (Cambridge, England : 2003) [Dalton Trans] 2024 Jun 04; Vol. 53 (22), pp. 9473-9481. Date of Electronic Publication: 2024 Jun 04.
DOI:	10.1039/d4dt00794h
Abstrakt:	In order to prepare self-standing and flexible slow neutron reflectors made of graphite fluoride (GF) with high contents of (C 2 F) n structural phase, graphite foils of different thicknesses were used as starting materials for gas (F 2 )/solid fluorination. The maximal interlayer distance of GF was obtained with this phase thanks to the stacking sequence FCCF/FCCF; this is mandatory for the efficient reflection of slow neutrons. 71 and 77% of the (C 2 F) n phase were achieved for graphite foils with thicknesses of 1.0 and 0.1 mm, respectively. The interlayer distances were 8.6 Å as expected. The fluorination conditions (static mode, a long duration of 24 h, annealing in pure F 2 gas for 24 h, and temperatures in the 390-460 °C range) were adapted to large pieces of graphite foils (7 × 7 cm 2 ) in order to both avoid exfoliation and achieve a homogeneous dispersion of fluorine atoms. This process was also efficient for thinner (0.01 mm thick) graphitized graphene oxide foil. 56% of the (C 2 F) n phase and an interlayer of 8.6 Å were achieved for this foil when fluorination was performed at 430 °C. Whatever the nature and the thickness of the foil, their flexibilities are maintained.
Databáze:	MEDLINE
Externí odkaz:	Zobrazit plný text záznamu