Mechanochemical synthesis of non-stoichiometric copper sulfide Cu 1.8 S applicable as a photocatalyst and antibacterial agent and synthesis scalability verification

An effort to prepare different non-stoichiometric Cu S compounds starting from elemental precursors using mechanochemistry was made in this study. However, out of the 7 stoichiometries tested, it was only possible to obtain three phases: covellite CuS, chalcocite Cu S and digenite Cu S and their mix...

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Veröffentlicht in:Faraday discussions 2023-01, Vol.241, p.367-386
Hauptverfasser: Baláž, Matej, Augustyniak, Adrian, Tatykayev, Batukhan, Shalabayev, Zhandos, Burashev, Gairat, Dutková, Erika, Daneu, Nina, Briančin, Jaroslav, Balážová, Ľudmila, Tkáčiková, Ľudmila, Stahorský, Martin, Achimovičová, Marcela, Baláž, Peter
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container_start_page 367
container_title Faraday discussions
container_volume 241
creator Baláž, Matej
Augustyniak, Adrian
Tatykayev, Batukhan
Shalabayev, Zhandos
Burashev, Gairat
Dutková, Erika
Daneu, Nina
Briančin, Jaroslav
Balážová, Ľudmila
Tkáčiková, Ľudmila
Stahorský, Martin
Achimovičová, Marcela
Baláž, Peter
description An effort to prepare different non-stoichiometric Cu S compounds starting from elemental precursors using mechanochemistry was made in this study. However, out of the 7 stoichiometries tested, it was only possible to obtain three phases: covellite CuS, chalcocite Cu S and digenite Cu S and their mixtures. To obtain the digenite phase with the highest purity, the Cu : S stoichiometric ratio needed to be fixed at 1.6 : 1. The reaction between copper and sulfur was completed within a second range, however, milling was performed for up to 15 minutes until the equilibrium in phase composition between digenite and covellite was reached. The possibility of preparing the product in a 300 g batch by eccentric vibratory milling in 30 minutes was successfully verified at the end. The estimated crystallite sizes for the digenite Cu S obtained lab-scale and scalable experiments were around 12 and 17 nm, respectively. The obtained products were found to be efficient photocatalysts under visible light irradiation in the presence of hydrogen peroxide, being capable of the complete degradation of the Methyl Orange dye in a concentration of 10 mg L in 2 hours. Finally, the antibacterial potential of both lab-scale and large-scale industrial products was proven and, regardless of the manufacturing scale, the nanoparticles retained their properties against bacterial cells.
doi_str_mv 10.1039/D2FD00082B
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However, out of the 7 stoichiometries tested, it was only possible to obtain three phases: covellite CuS, chalcocite Cu S and digenite Cu S and their mixtures. To obtain the digenite phase with the highest purity, the Cu : S stoichiometric ratio needed to be fixed at 1.6 : 1. The reaction between copper and sulfur was completed within a second range, however, milling was performed for up to 15 minutes until the equilibrium in phase composition between digenite and covellite was reached. The possibility of preparing the product in a 300 g batch by eccentric vibratory milling in 30 minutes was successfully verified at the end. The estimated crystallite sizes for the digenite Cu S obtained lab-scale and scalable experiments were around 12 and 17 nm, respectively. The obtained products were found to be efficient photocatalysts under visible light irradiation in the presence of hydrogen peroxide, being capable of the complete degradation of the Methyl Orange dye in a concentration of 10 mg L in 2 hours. 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The obtained products were found to be efficient photocatalysts under visible light irradiation in the presence of hydrogen peroxide, being capable of the complete degradation of the Methyl Orange dye in a concentration of 10 mg L in 2 hours. 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subjects Anti-Bacterial Agents - pharmacology
Copper - chemistry
Nanoparticles - chemistry
Sulfides - chemistry
title Mechanochemical synthesis of non-stoichiometric copper sulfide Cu 1.8 S applicable as a photocatalyst and antibacterial agent and synthesis scalability verification
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