Antibacterial studies of novel Cu2WS4 ternary chalcogenide synthesized by hydrothermal process

Kannan, S.; Vinitha, Perumal; Mohanraj, K.; Sivakumar, G.

doi:10.1016/j.jssc.2017.11.005

Cited by 23 publications

(11 citation statements)

References 24 publications

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“…The ultraviolet–visible–near-infrared (UV–vis–NIR) absorption spectrum shows that CWS NCs have two distinct peaks at 329 and 458 nm, similar to those of previously reported I -CWS (Figure i) . Although hydrothermal synthesis has also been reported for the preparation of CWS materials, the reaction time is very long (>24 h), and the size of CWS is in the submicron range. ,, In comparison, microwave synthesis can significantly reduce both the reaction time (4 h) and the size of CWS NCs (∼20 nm).…”

Section: Resultssupporting

confidence: 83%

“…Although submicron Cu 2 WS 4 flake-like aggregates with antibacterial activity have been recently reported, these large-size CWS aggregates (2 μg mL –1 ) showed very low inactivation efficiency (about 30%) to E. coli in our hands (Figure S10), which is about 5 log lower than that of the small-size CWS NCs prepared in this study.…”

Section: Resultscontrasting

confidence: 64%

“…Although submicron Cu 2 WS 4 flake-like aggregates with antibacterial activity have been recently reported, 41 these large-size CWS aggregates (2 μg mL −1 ) showed very low inactivation efficiency (about 30%) to E. coli in our hands (Figure S10), which is about 5 log lower than that of the smallsize CWS NCs prepared in this study. Until now, the exact reason for the different antibacterial efficiency between the CWS nanomaterials prepared by different methods is not completely understood, which may derive from the difference of size, morphology, or surface property.…”

Section: Resultscontrasting

confidence: 60%

“…40 Although hydrothermal synthesis has also been reported for the preparation of CWS materials, the reaction time is very long (>24 h), and the size of CWS is in the submicron range. 38,40,41 In comparison, microwave synthesis can significantly reduce both the reaction time (4 h) and the size of CWS NCs (∼20 nm). Antibacterial Activity of Cu 2 WS 4 Nanocrystals.…”

Section: Resultsmentioning

confidence: 99%

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Efficient Bacteria Killing by Cu₂WS₄ Nanocrystals with Enzyme-like Properties and Bacteria-Binding Ability

et al. 2019

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Antibacterial agents with high antibacterial efficiency and bacteria-binding capability are highly desirable. Herein, we describe the successful preparation of Cu2WS4 nanocrystals (CWS NCs) with excellent antibacterial activity. CWS NCs with small size (∼20 nm) achieve more than 5 log (>99.999%) inactivation efficiency of both Staphylococcus aureus (Gram-positive) and Escherichia coli (Gram-negative) at low concentration (<2 μg mL–1) with or without ambient light, which is much better than most of the reported antibacterial nanomaterials (including Ag, TiO2, etc.) and even better than the widely used antibiotics (vancomycin and daptomycin). Antibacterial mechanism study showed that CWS NCs have both enzyme-like (oxidase and peroxidase) properties and selective bacteria-binding ability, which greatly facilitate the production of reactive oxygen species to kill bacteria. Animal experiments further indicated that CWS NCs can effectively treat wounds infected with methicillin-resistant Staphylococcus aureus (MRSA). This work demonstrates that CWS NCs have the potential as effective antibacterial nanozymes for the treatment of bacterial infection.

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Section: Resultssupporting

confidence: 83%

Section: Resultscontrasting

confidence: 64%

Section: Resultscontrasting

confidence: 60%

Section: Resultsmentioning

confidence: 99%

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Efficient Bacteria Killing by Cu₂WS₄ Nanocrystals with Enzyme-like Properties and Bacteria-Binding Ability

et al. 2019

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“…For instance, Cu 2 WS 4 ternary chalcogenide synthesized by using a facile hydrothermal process has been utilized in eradicating different Gram-positive ( B. subtilis, M. luteus ) and Gram-negative ( E. coli , P. aeruginosa , and K. pneumoniae ) bacteria due to the excessive ROS production. 82 Nowadays, these chalcogenides are being used under a varied spectrum due to their extensive physicochemical properties. Multimodal PTT is one of the primary applications among them.…”

Section: Multimodal Photothermal Therapies Against Superbugsmentioning

confidence: 99%

Nanomaterials as multimodal photothermal agents (PTAs) against ‘Superbugs’

Roy

Guo

2023

J. Mater. Chem. B

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Visible‐Light‐Driven Selective Hydrogenation of Nitrostyrene over Layered Ternary Sulfide Nanostructures

Chen,

Feng,

Feng

et al. 2023

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Selective hydrogenation of nitrostyrenes is a great challenge due to the competitive activation of the nitro groups (─NO2) and carbon–carbon (C═C) double bonds. Photocatalysis has emerged as an alternative to thermocatalysis for the selective hydrogenation reaction, bypassing the precious metal costs and harsh conditions. Herein, two crystalline phases of layered ternary sulfide Cu2WS4, that is, body‐centered tetragonal I‐Cu2WS4 nanosheets and primitive tetragonal P‐Cu2WS4 nanoflowers, are controlled synthesized by adjusting the capping agents. Remarkably, these nanostructures show visible‐light‐driven photocatalytic performance for selective hydrogenation of 3‐nitrostyrene under mild conditions. In detail, the I‐Cu2WS4 nanosheets show excellent conversion of 3‐nitrostyrene (99.9%) and high selectivity for 3‐vinylaniline (98.7%) with the assistance of Na2S as a hole scavenger. They also can achieve good hydrogenation selectivity to 3‐ethylnitrobenzene (88.5%) with conversion as high as 96.3% by using N2H4 as a proton source. Mechanism studies reveal that the photogenerated electrons and in situ generated protons from water participate in the former hydrogenation pathway, while the latter requires the photogenerated holes and in situ generated reactive oxygen species to activate the N2H4 to form cis‐N2H2 for further reduction. The present work expands the rational synthesis of ternary sulfide nanostructures and their potential application for solar‐energy‐driven organic transformations.

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Antibacterial studies of novel Cu2WS4 ternary chalcogenide synthesized by hydrothermal process

Cited by 23 publications

References 24 publications

Efficient Bacteria Killing by Cu₂WS₄ Nanocrystals with Enzyme-like Properties and Bacteria-Binding Ability

Efficient Bacteria Killing by Cu₂WS₄ Nanocrystals with Enzyme-like Properties and Bacteria-Binding Ability

Nanomaterials as multimodal photothermal agents (PTAs) against ‘Superbugs’

Visible‐Light‐Driven Selective Hydrogenation of Nitrostyrene over Layered Ternary Sulfide Nanostructures

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Antibacterial studies of novel Cu2WS4 ternary chalcogenide synthesized by hydrothermal process

Cited by 23 publications

References 24 publications

Efficient Bacteria Killing by Cu2WS4 Nanocrystals with Enzyme-like Properties and Bacteria-Binding Ability

Efficient Bacteria Killing by Cu2WS4 Nanocrystals with Enzyme-like Properties and Bacteria-Binding Ability

Nanomaterials as multimodal photothermal agents (PTAs) against ‘Superbugs’

Visible‐Light‐Driven Selective Hydrogenation of Nitrostyrene over Layered Ternary Sulfide Nanostructures

Contact Info

Product

Resources

About

Efficient Bacteria Killing by Cu₂WS₄ Nanocrystals with Enzyme-like Properties and Bacteria-Binding Ability

Efficient Bacteria Killing by Cu₂WS₄ Nanocrystals with Enzyme-like Properties and Bacteria-Binding Ability