Abstract
Rapid solvent-free mechanochemical synthesis of CTS nanocrystals from elemental precursors is reported herein. The process is completed in 15 min, proceeding through immediate formation of CuS in a self-sustaining manner and its subsequent reaction with Sn and residual sulfur. The reaction progress was monitored by pressure and temperature changes in the milling vessel, X-ray diffraction, Soxhlet analysis, grain size analysis and electric resistivity measurements. The relationship between the consumption of metallic precursors, grain size and electrical resistivity is provided. The final product was nanocrystalline with crystallite size below 10 nm, as confirmed by both X-ray diffraction and transmission electron microscopy. The nanocrystals are agglomerated into micrometer-sized grains. It exhibits poor porous properties with the specific surface area value of 2.5 m2/g. The X-ray photoelectron spectroscopy has shown that the surface is significantly oxidized, due to milling in air. The optical properties of the prepared CTS nanocrystals are interesting for photovoltaic applications.
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Acknowledgements
The present study was supported by the Slovak Research and Development Agency (Contract Nos. APVV-14-0103 and APVV-15-0438) and Slovak Grant Agency VEGA (Projects 2/0044/18, 2/0065/18, 2/0141/16, 2/0128/16 and 1/0340/18). The financial support of Ministry of Education Agency for structural funds of EU Project ITMS 26220220061 and from the Slovenian Research Agency (Research Core Funding No. P2-0091) is also gratefully acknowledged.
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Baláž, M., Daneu, N., Rajňák, M. et al. Rapid mechanochemical synthesis of nanostructured mohite Cu2SnS3 (CTS). J Mater Sci 53, 13631–13642 (2018). https://doi.org/10.1007/s10853-018-2499-6
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DOI: https://doi.org/10.1007/s10853-018-2499-6