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References

2016

Articles:

Turgis, R., Arrachart, G., Dubois, V., Dourdain, S., Virieux, D., Michel, S., Legeai, S., Lejeune, M., Draye, M. and Pellet-Rostaing, S.
Dalton Transactions, 45(Copyright (C) 2016 American Chemical Society (ACS). All Rights Reserved.):1259-1268
2016

Resume: The extn. of rare earth elements (REEs) from nitric acid soln. with a triphosphine trioxide (TPO) is presented. Performances of such a ligand in ionic liqs. vs. a classical solvent (benzyl ether) are compared. TPO seems to be 10 to 100 times more efficient when it is dissolved in ionic media whatever the concn. of nitric acid involved. Mechanistic investigations reveal that cation exchange classically obsd. in ionic liqs. is not consistent with the exptl. data. Moreover, clear differences in the TPO/Ln complexes between classical and ionic media are highlighted. A stable complex of 1 lanthanide for 3 TPO is formed in an ionic liq. whereas a complex of 1 lanthanide for 6 to 9 TPO is formed in benzyl ether. Back extn. is also studied and good recovery of REEs could be obtained. The TPO/ionic liq. system shows remarkable performances i.e. efficiency and selectivity towards lanthanides in a simulated leaching soln. of a Nd/Fe/B/Dy magnet. [on SciFinder(R)]

Equipe: Département CP2S : Chimie et électrochimie des matériaux

Thiebaud, Laura, Legeai, Sophie and Stein, Nicolas
Electrochimica Acta,
2016

Mots clefs: Electrodeposition Nanowires Tellurium Ionic liquid Hollow nanostructures

Resume: Abstract Template-free electrodeposition of Te one-dimensional (1 D) nanostructures was carried out from an ionic liquid binary mixture: 1-ethyl-1-octyl-piperidinium bis(trifluoromethylsulfonyl)imide:1-ethyl-1-octyl-piperidinium bromide (EOPipTFSI:EOPipBr 95:5 (mol%)). SAED and XRD analyses confirm the formation of Te 1D nanostructures with a hexagonal single crystalline structure following the [001] direction. A systematic study of the influence of synthesis parameters on the deposits morphology has shown that it is possible to control the shape and the dimensions of the deposited nanostructures. Specifically, the applied potential has a strong influence on the morphology of the deposits. Nanowires or hollow nanostructures can be obtained, depending on mass transport conditions, as confirmed by the use of a soluble anode.

Equipe: Département CP2S : Chimie et électrochimie des matériaux

2015

Articles:

Hazotte, Claire, Meux, Eric, Leclerc, Nathalie and Lapicque, Francois
Chemical Engineering and Processing: Process Intensification, 96:83-93
2015

Mots clefs: Electroassisted leaching Electrodeposition Ni–Cd batteries Solid waste Transport rates

Resume: Abstract Combined leaching of solid wastes to electrodeposition can be an attractive technique for their optimal beneficiation. In most investigations in the area, results are given in terms of energy consumption and selectivity, without thorough analysis of the rates of the various processes involved. The present investigation deals with the significance of transport and transfer phenomena involved in relation to reaction processes, in a cell combining electroassisted leaching to electrodeposition in view to designing treatment processes of manufactured wares after their end of life. The case of the so-called black mass of used Ni–Cd batteries has been considered here, for the separate productions of nickel salts and metal cadmium. First, leaching of the various hydroxides contained in the black mass has been studied either upon addition of acid or by electrochemical generation of H+ at the anode. Moreover, transport of the metal cations produced from the anode compartment to the cathode through the cloth acting as the separator has been investigated through a simple description of transport phenomena. Comparison and discussion of the various transport or reaction rates could show that ion transport through the porous separator could represent the rate-determining step.

Equipe: Département CP2S : Chimie et électrochimie des matériaux

Hazotte, Claire, Leclerc, Nathalie, Diliberto, Sébastien, Meux, Eric and Lapicque, Francois
Environmental Technology, 36(6):796-805
2015

Resume: The aim of this paper is the characterization of spent NiCd batteries and the characterization of an industrial Black Mass obtained after crushing spent NiCd batteries and physical separation in a treatment plant. The characterization was first performed with five cylindrical NiCd batteries which were manually dismantled. Their characterization includes mass balance of the components, active powders elemental analysis and phase identification by X-ray powder diffraction. Chemical speciation of the two metals was also investigated. For cadmium, speciation was previously developed on solid synthetic samples. In a spent battery, the active powders correspond to about 43% of the battery weight. The other components are the separator and polymeric pieces (5%), the support plates (25%) and the carbon steel external case (27%). The sequential procedure shows that the nickel in the positive powders from the dismantled Ni?Cd batteries is distributed between Ni0 (39.7%), Ni(OH)2 (58.5%) and NiOOH (1.8%). Cadmium in the negative powder is about 99.9% as the Cd(OH)2 form with 0.1% of metal cadmium. In the industrial Black Mass, the distribution of cadmium is the same, whereas the distribution of nickel is Ni0 (46.9%), Ni(OH)2 (43.2%) and NiOOH (9.9%). This material contains also 1.8% cobalt and approx. 1% iron.

Equipe: Département CP2S : Chimie et électrochimie des matériaux

Chang, Taehoo, Cho, Sungmee, Kim, Jeongmin, Schoenleber, Jonathan, Frantz, Cedric, Stein, Nicolas, Boulanger, Clotilde and Lee, Wooyoung
Electrochimica Acta, 161:403-407
2015

Resume: In this study, we examd. individual bismuth telluride nanowires (NWs) electrodeposited in polycarbonate membranes (PCM) used as sacrificial templates. It has been demonstrated that the compn. of Bi2Te3 is controlled by the electrodeposition conditions, e.g. the applied potential. High-resoln. transmission electron microscopy (HRTEM) shows that the av. grain size of NWs increases with increasing Te content. Our results also reveal that the electrodeposited bismuth telluride NWs are n-type, and their elec. cond. increases with increasing Te content. These NWs also demonstrated a max. power factor of 195.8 mW/m·K2 for the Te-rich NW (d = 162 nm) at 300 K. [on SciFinder(R)]

Equipe: Département CP2S : Chimie et électrochimie des matériaux

Li, Shen, Chaput, Laurent, Stein, Nicolas, Frantz, Cedric, Lacroix, David and Termentzidis, Konstantinos
Applied Physics Letters, 106(23):233108
2015

Mots clefs: molecular dynamics method phonons thermal conductivity bismuth compounds nanowires

Equipe: Département CP2S : Chimie et électrochimie des matériaux

2014

Articles:

Kandaskalov, D., Fournee, V., Ledieu, J. and Gaudry, E.
JOURNAL OF PHYSICAL CHEMISTRY C, 118(40):23032-23041
2014
ISSN: 1932-7447

Equipe: Département CP2S : Métallurgie et Surfaces

Lambert, C-H., Mangin, S., Varaprasad, B.S.D.C.S., Takahashi, Y.K., Hehn, M., Cinchetti, M., Malinowski, G., Hono, K., Fainman, Y., Aeschlimann, M. and Fullerton, E.E.
Science,
2014

Equipe: Département P2M : Nanomagnétisme et Electronique de Spin

Turgut, C., Sinha, G., Mether, L., Lahtinen, J., Nordlund, K., Belmahi, M. and Philipp, P.
Analytical Chemistry, 86:11217-11225
2014

Equipe: Département CP2S : Expériences et Simulations des Plasmas Réactifs - Interaction plasma-surface et Traitement des Surfaces ESPRITS

Wegrowe, J.-E., Drouhin, H.-J. and Lacour, D.
Physical Review B - Condensed Matter and Materials Physics, 89(9)
2014

Equipe: Département P2M : Nanomagnétisme et Electronique de Spin

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