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Mechanochemistry for Energy Materials: Impact of High-Energy Milling on Chemical, Electric and Thermal Transport Properties of Chalcopyrite CuFeS2 Nanoparticles.
Baláz, Peter; Dutková, Erika; Baláz, Matej; Dzunda, Róbert; Navrátil, Jirí; Knízek, Karel; Levinský, Petr; Hejtmánek, Jirí.
Afiliación
  • Baláz P; Institute of Geotechnics, Slovak Academy of Sciences, Watsonova 45, 04001, Kosice, Slovakia.
  • Dutková E; Institute of Geotechnics, Slovak Academy of Sciences, Watsonova 45, 04001, Kosice, Slovakia.
  • Baláz M; Institute of Geotechnics, Slovak Academy of Sciences, Watsonova 45, 04001, Kosice, Slovakia.
  • Dzunda R; Institute of Materials Research, Slovak Academy of Sciences, Watsonova 47, 04001, Kosice, Slovakia.
  • Navrátil J; Institute of Physics of the Czech Academy of Sciences, Cukrovarnická 10, 16200, Prague, Czech Republic.
  • Knízek K; Institute of Physics of the Czech Academy of Sciences, Cukrovarnická 10, 16200, Prague, Czech Republic.
  • Levinský P; Institute of Physics of the Czech Academy of Sciences, Cukrovarnická 10, 16200, Prague, Czech Republic.
  • Hejtmánek J; Institute of Physics of the Czech Academy of Sciences, Cukrovarnická 10, 16200, Prague, Czech Republic.
ChemistryOpen ; 10(8): 806-814, 2021 Aug.
Article en En | MEDLINE | ID: mdl-34402605
Chalcopyrite CuFeS2 , a semiconductor with applications in chemical sector and energy conversion engineering, was synthetized in a planetary mill from elemental precursors. The synthesis is environmentally friendly, waste-free and inexpensive. The synthesized nano-powders were characterized by XRD, SEM, EDX, BET and UV/Vis techniques, tests of chemical reactivity and, namely, thermoelectric performance of sintered ceramics followed. The crystallite size of ∼13 nm and the strain of ∼17 were calculated for CuFeS2 powders milled for 60, 120, 180 and 240 min, respectively. The evolution of characteristic band gaps, Eg, and the rate constant of leaching, k, of nano-powders are corroborated by the universal evolution of the parameter SBET /X (SBET -specific surface area, X-crystallinity) introduced for complex characterization of mechanochemically activated solids in various fields such as chemical engineering and/or energy conversion. The focus on non-doped semiconducting CuFeS2 enabled to assess the role of impurities, which critically and often negatively influence the thermoelectric properties.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: ChemistryOpen Año: 2021 Tipo del documento: Article País de afiliación: Eslovaquia Pais de publicación: Alemania
Texto completo
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: ChemistryOpen Año: 2021 Tipo del documento: Article País de afiliación: Eslovaquia Pais de publicación: Alemania