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Mechanochemistry for Energy Materials: Impact of High-Energy Milling on Chemical, Electric and Thermal Transport Properties of Chalcopyrite CuFeS2 Nanoparticles
ChemistryOpen ( IF 2.5 ) Pub Date : 2021-08-17 , DOI: 10.1002/open.202100144 Peter Baláž 1 , Erika Dutková 1 , Matej Baláž 1 , Róbert Džunda 2 , Jiří Navrátil 3 , Karel Knížek 3 , Petr Levinský 3 , Jiří Hejtmánek 3
ChemistryOpen ( IF 2.5 ) Pub Date : 2021-08-17 , DOI: 10.1002/open.202100144 Peter Baláž 1 , Erika Dutková 1 , Matej Baláž 1 , Róbert Džunda 2 , Jiří Navrátil 3 , Karel Knížek 3 , Petr Levinský 3 , Jiří Hejtmánek 3
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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.
中文翻译：
能源材料的机械化学：高能研磨对黄铜矿 CuFeS2 纳米颗粒的化学、电和热传输性能的影响
黄铜矿 CuFeS 2是一种在化学领域和能源转换工程中应用的半导体，是在行星磨机中由元素前体合成的。该合成方法环保、无废物且价格低廉。通过 XRD、SEM、EDX、BET 和 UV/Vis 技术对合成的纳米粉末进行了表征，随后测试了化学反应性，即烧结陶瓷的热电性能。计算出研磨 60、120、180 和 240 分钟的 CuFeS 2粉末的微晶尺寸为～13 nm，应变为～17。纳米粉末的特征带隙Eg和浸出速率常数k的演变由为配合物引入的参数S BET /X （ S BET -比表面积， X -结晶度）的普遍演变所证实。化学工程和/或能量转换等各个领域中机械化学活化固体的表征。对非掺杂半导体 CuFeS 2的关注使得能够评估杂质的作用，杂质对热电性能产生严重且经常产生负面影响。
更新日期：2021-08-17
中文翻译：
能源材料的机械化学：高能研磨对黄铜矿 CuFeS2 纳米颗粒的化学、电和热传输性能的影响
黄铜矿 CuFeS 2是一种在化学领域和能源转换工程中应用的半导体，是在行星磨机中由元素前体合成的。该合成方法环保、无废物且价格低廉。通过 XRD、SEM、EDX、BET 和 UV/Vis 技术对合成的纳米粉末进行了表征，随后测试了化学反应性，即烧结陶瓷的热电性能。计算出研磨 60、120、180 和 240 分钟的 CuFeS 2粉末的微晶尺寸为～13 nm，应变为～17。纳米粉末的特征带隙Eg和浸出速率常数k的演变由为配合物引入的参数S BET /X （ S BET -比表面积， X -结晶度）的普遍演变所证实。化学工程和/或能量转换等各个领域中机械化学活化固体的表征。对非掺杂半导体 CuFeS 2的关注使得能够评估杂质的作用，杂质对热电性能产生严重且经常产生负面影响。
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