Facile preparation and characterization of nanostructured ZnS/PbS heterojunction thin films for enhanced microbial inhibition and photocatalytic degradation

Aouf, Djaber; Henni, Abdellah; Selloum, Djamel; Khane, Yasmina; Fenniche, Fares; Zerrouki, Djamal; Belkhalfa, Hakim; Dizge, Nadir

doi:10.1016/j.matchemphys.2022.127059

Cited by 17 publications

(3 citation statements)

References 56 publications

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“…. Figure 9 showed that within the first 10 min of contact and irradiation, the concentration of dye steadily decreased which may be attributed to the availability of binding sites on the surface of the thin film [64]. The rate of photocatalytic degradation began to decrease after 25 min of testing, and it reached equilibrium after 60 min; the maximum degradation for the CR and MG dyes were found to be 40,13 and 60,22% for the pristine SnS 2 , 64,73 and 74,88% for the 2 at% Cu-doped SnS 2 and 54,25 and 70,73% for the 4 at% Cu-doped SnS 2 , respectively.…”

Section: Atomic Force Microscopy Analysismentioning

confidence: 97%

Influence of Cu doping on the functionality of spray coated SnS₂ thin films and its photocatalytic degradation of dyes and antibacterial activity

Radja,

Nebatti Ech-Chergui,

Zekri

et al. 2024

Phys. Scr.

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Tin sulfide (SnS2) is a material known for its effective photocatalytic activity due to its affordability and wide light spectrum response. To enhance and optimize its optical and chemical characteristics, doping is a straightforward approach that can improve its photocatalytic efficiency. This work focuses on the effect of Cu doping on the structural, optical, and photocatalytic properties of the thin films prepared by the spray-coating approach. XRD confirms the hexagonal SnS2 structure. As the amount of Cu added increases, the crystallite size decreases while dislocation density rises. The effective band gap is in the range of 1.9-2.2 eV. SEM image reveals a variety of morphologies, and the porosity is reduced with increasing Cu doping. Furthermore, the FTIR study confirm the Sn-S bond present at 753 cm-1. EPR studies reveal the existence of sulphur vacancies in Cu-doped SnS2. Mechanical properties were also affected, with an observed decrease in microhardness as the dopant concentration increased. The photocatalytic activity of the samples is studied by photocatalytic degradation of malachite green and Congo red dyes under visible light irradiation. Additionally, their antibacterial effect against Escherichia coli was examined. This study shows that an optimal amount of Cu doping can significantly increase the photocatalytic performance of SnS2 for efficiently decomposing organic pollutants and enhance antibacterial activities.

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Section: Atomic Force Microscopy Analysismentioning

confidence: 97%

Influence of Cu doping on the functionality of spray coated SnS₂ thin films and its photocatalytic degradation of dyes and antibacterial activity

Radja,

Nebatti Ech-Chergui,

Zekri

et al. 2024

Phys. Scr.

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“…Fakhri et al synthesized Cu-doped Ag 2 S NPs demonstrating outstanding antimicrobial efficacy, attributed to the superior scavenging effectiveness of the photogenerated charge carriers originating from the Cu dopant energy level . In addition, constructing effective heterostructures of two or more functional materials with appropriate electronic band alignment has the potential to significantly improve the material stability and enhance the separation of electron–hole pairs, thereby leading to improved ROS-based antimicrobial efficiency. , Yuan et al reported a significant improvement in the antibacterial activity by coating the CuS NPs with a 5-nm-thick polyaniline protective film, which effectively improved charge-carrier separation and ultimately resulted in elevated levels of ROS generation. The previous study conducted by the present authors revealed that the PDA@SnS/g-C 3 N 4 heterojunction demonstrates enhanced antibacterial activity under visible light, which was primarily attributed to the higher charge-carrier transport mechanism and reduced resistance, both contributing to the more effective separation and utilization of the photogenerated charge carriers’ efficiency .…”

Section: Introductionmentioning

confidence: 99%

Ultrathin TiS₂@N,S-Doped Carbon Hybrid Nanosheets as Highly Efficient Photoresponsive Antibacterial Agents

Shah,

Sardar,

Liu

et al. 2024

ACS Appl. Mater. Interfaces

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Nanobactericides are employed as a promising class of nanomaterials for eradicating microbial infections, considering the rapid resistance risks of conventional antibiotics. Herein, we present a pioneering approach, reporting the synthesis of two-dimensional titanium disulfide nanosheets coated by nitrogen/sulfur-codoped carbon nanosheets (2D-TiS2@NSCLAA hybrid NSs) using a rapid l-ascorbic acid-assisted sulfurization of Ti3C2T x -MXene to achieve efficient alternative bactericides. The as-developed materials were systematically characterized using a suite of different spectroscopy and microscopy techniques, in which the X-ray diffraction/Raman spectroscopy/X-ray photoelectron spectroscopy data confirm the existence of TiS2 and C, while the morphological investigation reveals single- to few-layered TiS2 NSs confined by N,S-doped C, suggesting the successful synthesis of the ultrathin hybrid NSs. From in vitro evaluation, the resultant product demonstrates impressive bactericidal potential against both Gram-positive Staphylococcus aureus and Gram-negative Escherichia coli bacteria, achieving a substantial decrease in the bacterial viability under a 1.2 J dose of visible-light irradiation at the lowest concentration of 5 μg·mL–1 compared to Ti3C2T x (15 μg·mL–1), TiS2-C (10 μg·mL–1), and standard antibiotic ciprofloxacin (15 μg·mL–1), respectively. The enhanced degradation efficiency is attributed to the ultrathin TiS2 NSs encapsulated within heteroatom N,S-doped C, facilitating effective photogenerated charge-carrier separation that generates multiple reactive oxygen species (ROS) and induced physical stress as well as piercing action due to its ultrathin structure, resulting in multimechanistic cytotoxicity and damage to bacterial cells. Furthermore, the obtained results from molecular docking studies conducted via computational simulation (in silico) of the as-synthesized materials against selected proteins (β-lactamas E. coli /DNA-Gyras E. coli ) are well-consistent with the in vitro antibacterial results, providing strong and consistent validation. Thus, this sophisticated study presents a simple and effective synthesis technique for the structural engineering of metal sulfide-based hybrids as functionalized synthetic bactericides.

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“…Compared to vacuum-based methods, electrochemical deposition is a simple and cost-effective technique for growing thin films, as it affords close control of reactions during the deposition process and control of growth and structure, which in turn allows for monitoring of the deposition materials and provides many opportunities for material modification [5,6]. As a result, this method has received considerable attention for the deposition of metals and semiconductor materials [7][8][9]. The electrodeposition of p-type Cu2O thin films is usually performed in a basic electrolyte containing Cu 2+ ions and a chelating agent such as f lactic acid, citric acid, or tartaric acid to prevent Cu precipitation in basic conditions [10].…”

Section: Introductionmentioning

confidence: 99%

In-Depth Study of Chemically Electrodeposited Cuprous Oxide (Cu2O) thin Films on ITO Glass

Nouasria,

Selloum,

Mokrani

et al. 2024

Plasmonics

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In this contribution, we report the screening of different parameters contributing to the electrodeposition of Cu2O nanostructures as an electrode material to provide an overall understanding of the effect of the entire method conditions. We varied different parameters (pH, potential, and deposition time) during the electrodeposition of cuprous oxide (Cu2O) thin films on ITO glass substrate and integrated different methods: X-ray diffraction (XRD), UV-vis absorption (UV-Vis), scanning electron microscope (SEM), cyclic voltammetry (CV), and chronoamperometry (CA) to deeply examine the as-synthesized materials and interrogate their efficiency towards the conversion of light to current (photo-current). From the chronoamperometry experiments, all the curves of current transients exhibit a typical response of a progressive 3D nucleation growth. Highly crystalline Cu2O structures of nano-cubes can be seen in the XRD and SEM results at high pH (12.5) and at potentials -0.5 and -0.6 V Vs. SCE during 60 min of deposition time. UV-Vis results showed high optical absorption in the region of 300-500 nm. The photocurrent measurements of Cu2O coupled with Cu-doped ZnO suggested that the synthesized Cu2O proved to be the best candidate as a solar cell.

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Facile preparation and characterization of nanostructured ZnS/PbS heterojunction thin films for enhanced microbial inhibition and photocatalytic degradation

Cited by 17 publications

References 56 publications

Influence of Cu doping on the functionality of spray coated SnS₂ thin films and its photocatalytic degradation of dyes and antibacterial activity

Influence of Cu doping on the functionality of spray coated SnS₂ thin films and its photocatalytic degradation of dyes and antibacterial activity

Ultrathin TiS₂@N,S-Doped Carbon Hybrid Nanosheets as Highly Efficient Photoresponsive Antibacterial Agents

In-Depth Study of Chemically Electrodeposited Cuprous Oxide (Cu2O) thin Films on ITO Glass

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Facile preparation and characterization of nanostructured ZnS/PbS heterojunction thin films for enhanced microbial inhibition and photocatalytic degradation

Cited by 17 publications

References 56 publications

Influence of Cu doping on the functionality of spray coated SnS2 thin films and its photocatalytic degradation of dyes and antibacterial activity

Influence of Cu doping on the functionality of spray coated SnS2 thin films and its photocatalytic degradation of dyes and antibacterial activity

Ultrathin TiS2@N,S-Doped Carbon Hybrid Nanosheets as Highly Efficient Photoresponsive Antibacterial Agents

In-Depth Study of Chemically Electrodeposited Cuprous Oxide (Cu2O) thin Films on ITO Glass

Contact Info

Product

Resources

About

Influence of Cu doping on the functionality of spray coated SnS₂ thin films and its photocatalytic degradation of dyes and antibacterial activity

Influence of Cu doping on the functionality of spray coated SnS₂ thin films and its photocatalytic degradation of dyes and antibacterial activity

Ultrathin TiS₂@N,S-Doped Carbon Hybrid Nanosheets as Highly Efficient Photoresponsive Antibacterial Agents