Neutron diffraction study of bismuth nanowires incorporated within powder ZSM-12 and ZSM-22 zeolites
Bismuth is the one of the best thermoelectric materials for Peltier cooling, we hope to improve its properties by reducing its dimensionality and by designing bismuth nanowires for which large enhancement of the thermoelectric properties have been predicted. Porous materials are ideal for designing a network of nanowires. The objective of this experiments is to confirm successful synthesis of two zeolite/Bi composites with 1D pore structures (ZSM-22 and ZSM-12) and to determine the structure of Bi nanowires within the zeolites and how the structures of the zeolites are modified by the incorporation of bismuth. Neutron diffraction is suitable for such bulk sample due to its high penetration depth, which will permit to probe the whole sample despite of the presence of residual bismuth outside the zeolite. 25mm3 samples will be prepared from zeolite powder and Bi at 6 GPa and 300°C in a belt press for this experiment.
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HAINES Julien; FABBIANI Marco; Thomas C. Hansen; TOULEMONDE Pierre and VIENNOIS Romain. (2020). Neutron diffraction study of bismuth nanowires incorporated within powder ZSM-12 and ZSM-22 zeolites. Institut Laue-Langevin (ILL) doi:10.5291/ILL-DATA.5-22-793
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