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

Baláž, Matěj; Augustyniak, Adrian; Tatykayev, Batukhan; Shalabayev, Zhandos; Burashev, Gairat; Dutková, Erika; Daneu, Nina; Briančin, Jaroslav; Balážová, Ľudmila; Tkáčiková, Ľudmila; Stahorský, Martin; Achimovičová, Marcela; Baláž, Peter

doi:10.1039/d2fd00082b

Cited by 7 publications

(9 citation statements)

References 65 publications

(121 reference statements)

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“…Sulfur-mediated copper sulfide nanocrystals synthesized through a mechanochemical approach showed good antimicrobial activity. CuS with micro-sized particles showed high antimicrobial activity in gram-negative bacteria, whereas the reduction of particle size make them active against both strains of the bacteria [ 145 , 146 ]. AgNPs synthesized from the mechanochemical method using lignin as a reducing agent and polyacrylamide as support were shown to be highly efficient for the complete killing of both gram-positive and gram-negative bacteria strains.…”

Section: Antimicrobial Applications Of Mechanochemically-synthesized ...mentioning

confidence: 99%

Mechanochemical Synthesis of Nanoparticles for Potential Antimicrobial Applications

2023

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There is an increased interest in porous materials due to their unique properties such as high surface area, enhanced catalytic properties, and biological applications. Various solvent-based approaches have been already used to synthesize porous materials. However, the use of large volume of solvents, their toxicity, and time-consuming synthesis make this process less effective, at least in terms of principles of green chemistry. Mechanochemical synthesis is one of the effective eco-friendly alternatives to the conventional synthesis. It adopts the efficient mixing of reactants using ball milling without or with a very small volume of solvents, gives smaller size nanoparticles (NPs) and larger surface area, and facilitates their functionalization, which is highly beneficial for antimicrobial applications. A large variety of nanomaterials for different applications have already been synthesized by this method. This review emphasizes the comparison between the solvent-based and mechanochemical methods for the synthesis of mainly inorganic NPs for potential antimicrobial applications, although some metal-organic framework NPs are briefly presented too.

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Section: Antimicrobial Applications Of Mechanochemically-synthesized ...mentioning

confidence: 99%

Mechanochemical Synthesis of Nanoparticles for Potential Antimicrobial Applications

2023

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“…However, controlling the phase purity during the preparation of nanoscale non-stoichiometric copper sulfides is not straightforward. 13 Lately, copper sulfide nanomaterials have emerged as a potential alternative to noble metal-based material to fabricate electrodes. 14,15 Apart from a large abundance of copper, another reason to choose copper is that it possesses accessible redox states varying from Cu I to Cu III .…”

Section: ■ Introductionmentioning

confidence: 99%

“…In the close-packed structure, disulfide bonds are found in between two tetrahedral layers, which brings additional lattice stability . Due to local non-homogeneity and imperfection in lattice packing, the non-stoichiometric copper sulfides possess a unique electronic structure, which gives an advantage in fabricating electrodes . In this context, digenite Cu 9 S 5 is a non-stoichiometric sulfide containing mixed-valence copper.…”

Section: Introductionmentioning

confidence: 99%

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Surface Structure to Tailor the Electrochemical Behavior of Mixed-Valence Copper Sulfides during Water Electrolysis

Kundu,

Chakraborty

2024

JACS Au

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The semiconducting behavior of mixed-valence copper sulfides arises from the pronounced covalency of Cu–S bonds and the exchange coupling between CuI and CuII centers. Although electrocatalytic study with digenite Cu9S5 and covellite CuS has been performed earlier, detailed redox chemistry and its interpretation through lattice structure analysis have never been realized. Herein, nanostructured Cu9S5 and CuS are prepared and used as electrode materials to study their electrochemistry. Powder X-ray diffraction (PXRD) and microscopic studies have found the exposed surface of Cu9S5 to be d(0015) and d(002) for CuS. Tetrahedral (T d) CuII, distorted octahedral (Oh) CuII, and trigonal planar (Tp) CuI sites form the d(0015) surface of Cu9S5, while the (002) surface of CuS consists of only T d CuII. The distribution of CuI and CuII sites in the lattice, predicted by PXRD, can further be validated through core-level Cu 2p X-ray photoelectron spectroscopy (XPS). The difference in the electrochemical response of Cu9S5 and CuS arises predominantly from the different copper sites present in the exposed surfaces and their redox states. In situ Raman spectra recorded during cyclic voltammetric study indicates that Cu9S5 is more electrochemically labile compared to CuS and transforms rapidly to CuO/Cu2O. Contact-angle and BET analyses imply that a high-surface-energy and macroporous Cu9S5 surface favors the electrolyte diffusion, which leads to a pronounced redox response. Post-chronoamperometric (CA) characterizations identify the potential-dependent structural transformation of Cu9S5 and CuS to CuO/Cu2O/Cu(OH)2 electroactive species. The performance of the in situ formed copper-oxides towards electrocatalytic water-splitting is superior compared to the pristine copper sulfides. In this study, the redox chemistry of the Cu9S5/CuS has been correlated to the atomic arrangements and coordination geometry of the surface exposed sites. The structure–activity correlation provides in-depth knowledge of how to interpret the electrochemistry of metal sulfides and their in situ potential-driven surface/bulk transformation pathway to evolve the active phase.

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“…Moreover, the use of semiconductor photocatalysts is environmentally friendly, as they are non-toxic and can be easily immobilized onto different surfaces [8]. Using photocatalysts multiple times also results in lower consumable costs [9,10].…”

Section: Introductionmentioning

confidence: 99%

The superiority of the photocatalytic and antibacterial performance of mechanochemically synthesized CdS nanoparticles over solvothermal-prepared ones

Burashev,

Tatykayev,

Baláž

et al. 2024

Semicond. Sci. Technol.

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In this work, we have developed a facile, dry, and environmentally friendly mechanochemical method for the synthesis of cadmium sulfide (m-CdS) nanoparticles in a planetary ball mill using non-toxic precursors. Thiourea was for the first time used as a precursor of sulfide ion in room temperature solid state ball milling synthesis. For comparison of the mechanochemical approach with others, cadmium sulfide nanoparticles were also prepared using the solvothermal method (s-CdS). The crystal structure of cadmium sulfide nanoparticles was studied by XRD, the qualitative chemical band properties were examined by Raman scattering and x-ray photoelectron spectroscopy analysis, and particle morphology and microstructure were investigated by scanning electron microscopy and transmission electron microscopy methods. The sizes of the m-CdS nanoparticles had 5–6 nm in diameter, which is 10 times smaller than the diameter of s-CdS nanorods. The photocatalytic activities of as-prepared cadmium sulfide nanoparticles on the dye degradation and hydrogen production by water splitting were evaluated and the antibacterial activities were also tested. The photocatalytic activity of m-CdS was superior to that of s-CdS in the degradation of Orange II under visible light irradiation. Better results for m-CdS were also evidenced in photocatalytic experiments on hydrogen generation. The maximum rate of hydrogen evolution for m-CdS was 191.9 µmolg−1h−1 at the 120th min,while this indicator for s-CdS was only 58.0 µmolg−1h−1 at the same irradiation time.The better effect of m-CdS was evidenced also in an antibacterial study (namely against gram-positive bacteria).

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Mechanochemical synthesis of non-stoichiometric copper sulfide Cu_1.8S applicable as a photocatalyst and antibacterial agent and synthesis scalability verification

Abstract: An effort to prepare different non-stoichiometric CuxSy compounds starting from elemental precursors using mechanochemistry was made in this study. However, out of 7 stoichiometries tested, it was only possible to...

Cited by 7 publications

References 65 publications

Mechanochemical Synthesis of Nanoparticles for Potential Antimicrobial Applications

Mechanochemical Synthesis of Nanoparticles for Potential Antimicrobial Applications

Surface Structure to Tailor the Electrochemical Behavior of Mixed-Valence Copper Sulfides during Water Electrolysis

The superiority of the photocatalytic and antibacterial performance of mechanochemically synthesized CdS nanoparticles over solvothermal-prepared ones

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Mechanochemical synthesis of non-stoichiometric copper sulfide Cu1.8S applicable as a photocatalyst and antibacterial agent and synthesis scalability verification

Abstract: An effort to prepare different non-stoichiometric CuxSy compounds starting from elemental precursors using mechanochemistry was made in this study. However, out of 7 stoichiometries tested, it was only possible to...

Cited by 7 publications

References 65 publications

Mechanochemical Synthesis of Nanoparticles for Potential Antimicrobial Applications

Mechanochemical Synthesis of Nanoparticles for Potential Antimicrobial Applications

Surface Structure to Tailor the Electrochemical Behavior of Mixed-Valence Copper Sulfides during Water Electrolysis

The superiority of the photocatalytic and antibacterial performance of mechanochemically synthesized CdS nanoparticles over solvothermal-prepared ones

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Mechanochemical synthesis of non-stoichiometric copper sulfide Cu_1.8S applicable as a photocatalyst and antibacterial agent and synthesis scalability verification