Green synthesis of CdS Quantum dots for photocatalytic and anti-corrosive applications in aqueous media

Kandasamy, Kumar; Surendhiran, S.; Jagan, K. S. G.; Kumar, G. Suresh; Khadar, Y. A. Syed; Rajasingh, Paramasivan

doi:10.1016/j.apsadv.2022.100364

Cited by 19 publications

(4 citation statements)

References 50 publications

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“…This demonstrated that the influence of the corrosion inhibitor on the cathode reaction mechanism was negligible. When steel was submerged in 50 ppm and 100 ppm solutions, a clear saltation around -1.21 V was seen in the anode part of Tafel curves (Figure 7), suggesting that the primary source of the adsorption essence was CuO/rGO nanocomposite [24]. The obtained potentiodynamic polarisation parameters are given in Table 2.…”

Section: Resultsmentioning

confidence: 95%

Evaluation of physiochemical and electrochemical behaviour of reduced grapheme functionalized copper nanostructure as an effective corrosion inhibitor

Byeon,

Haribabu,

Kiradoo

et al. 2023

Bull. Chem. Soc. Eth.

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This study examines the physicochemical properties and corrosion resistance of hydrothermally produced copper oxide-reduced graphene oxide nanocomposite (CuO/rGO). The CuO/rGO nanocomposite has a well-defined and homogeneous structure, decreased crystal size, and uniformly distributed CuO nanoparticles tethered to the rGO. X-Ray diffraction confirms the fabrication of 15.1 nm crystalline monoclinic CuO nanoparticles. EDX confirms the composite's composition by detecting Cu, O, and C components. Electrochemical impedance spectroscopy (EIS) and potentiodynamic polarization (LSV) tests evaluate the CuO/rGO nanocomposite's corrosion resistance. A mild steel plate under an HCl electrolyte with corrosion in the PPM ratio treats the nanocomposite-coated substrate. The composite's synergistic effect is assessed by comparing its corrosion performance to CuO/rGO concentrations in ppm. The corrosion resistance data demonstrate that the CuO/rGO composite improves with inhibitor concentrations of 0, 25, 50, 75, and 100 ppm. Adding rGO to the composite protects it and speeds up charge transfer, reducing corrosion and improving stability. The composite's synergistic effect of CuO and rGO provides excellent corrosion resistance regardless of concentration, making it a viable material for corrosion-prone applications. The research develops novel and effective anti-corrosion methods to preserve materials in the food, automotive, and large-scale energy industries. KEY WORDS: CuO/rGO nanocomposite, Tafel plot, Corrosion protection, Surface analysis Bull. Chem. Soc. Ethiop. 2024, 38(1), 269-280. DOI: https://dx.doi.org/10.4314/bcse.v38i1.20

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Section: Resultsmentioning

confidence: 95%

Evaluation of physiochemical and electrochemical behaviour of reduced grapheme functionalized copper nanostructure as an effective corrosion inhibitor

Byeon,

Haribabu,

Kiradoo

et al. 2023

Bull. Chem. Soc. Eth.

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“…Carbon nanoparticles were produced in very small quantities by arc discharge. Arc discharge dust frequently contains a variety of intricate, challenging-to-extract elements [80]. The numerous investigations done for the arc discharge technique's synthesis of C-dots.…”

Section: Arc Dischargementioning

confidence: 99%

Carbon Dots for Future Prospects: Synthesis, Characterizations and Recent Applications: A Review (2019–2023)

Etefa,

Tessema,

Dejene

2024

Preprint

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Nanotechnology sparks discussions and concerns about the impacts of new nanomaterials on health and the environment. It holds importance in various domains due to its unique struc-tures. Carbon dots (C-dots) are versatile nanomaterials with applications in bioimaging, sensing, catalysis, polymers, solar cells, and more. They offer desirable characteristics such as stability, cost-effectiveness, biocompatibility, and high photoluminescent quantum yield. C-dots have the potential to replace expensive fluorophores in solar cells. They are catego-rized as carbon quantum dots, graphene quantum dots, and carbonized polymer dots. C-dots have outstanding optical and photoelectric properties with low toxicity. Bottom-up and top-down approaches are used for the synthesis of carbon dots (CDs), with each method im-pacting their physicochemical characteristics. The choice of synthesis method depends on de-sired properties and application requirements. Researchers combine these methods and ex-plore new approaches to enhance synthesis efficiency and tailor CD properties. CDs have di-verse chemical structures with modified oxygen, polymer-based, or amino groups on their surface. Various characterization methods such as HRTEM, XPS, and optical analysis (PL, UV) are used to determine CD structure. Carbon dots (CDs) are cutting-edge fluorescent nano-materials with remarkable qualities such as biocompatibility, low toxicity, environmental friendliness, high water solubility, and photo-stability. They are easily adjustable in terms of their optical properties, making them highly versatile in various fields. CDs find applications in bio-imaging, nanomedicine, drug delivery, solar cells, LEDs, photo-catalysis, elec-tro-catalysis, and other related areas.

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“…They are likely to give rise to a new generation of electronic (Samadi et al 2022), optoelectronic (Hassan et al 2023) and biological devices (Baretta et al 2023), with a major impact on diverse sectors including lighting (Sarker and Ahn 2023), sensors (Ouni et al 2023a), lasers (Jiang et al 2022), photovoltaics (Wang et al 2023), biomarkers (Jang et al 2023) and medical imaging (Chen et al 2023). An intensive research has performed on the study and development of group II-VI binary NPs, in particular, those containing cadmium (e.g., CdSe, CdS, CdTe) (Kandasamy et al 2023; Gan et al 2023;Liu et al 2023). These NPs are characterized by a uorescence emission that can be modulated by controlling the width of their band gap (gap energy) and their size, enabling them to cover a wide spectral range in the visible region.…”

Section: Introductionmentioning

confidence: 99%

An effective and sustainable dye removal via sunlight-based photocatalysis and adsorption using eco-friendly and low-cost ZnS nanoparticles: Experiments, modelling, and mechanism

Ouni,

Yahia,

Mohamed

et al. 2024

Preprint

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Novel sulfur zinc nanoparticles functionalized with thioglycolic acid were synthetized via hydrothermal route and tested in a solar radiation-based dye photodegradation process. These nanoparticles were characterized, and the findings revealed that thioglycolic acid was a strong capping ligand for the generation of sulfur zinc nanoparticles with a specific surface area of 36.82 m2/g and 7.15 nm average nanocrystal size. The cubic and wurtzite phases of these nanoparticles were confirmed via X-ray diffraction. The quantum confinement effect caused a larger energy band gap and a blue shift in the absorbance band of these nanoparticles in contrast to the bulk sulfur zinc. The improved adsorption effectiveness of these nanoparticles was proved to remove methylene blue from aqueous solutions. They can remove 30.92 mg/g of tested dye molecule. To understand the synergy between adsorption and photocatalysis, these nanoparticles were used to analyze the dye adsorption prior to the photodegradation via the experimental measurement of isotherms and kinetics. The rationalization of the dye adsorption on these nanoparticles was performed with calculated statistical physics parameters including the estimation of dye – nanoparticles adsorption energy. Dye molecules and nanoparticles surface exhibited physical interactions with adsorption energies of 25.92–23.31 kJ/mol. The sunlight-based photocatalytic activity of these nanoparticles demonstrated 91.1% dye degradation efficiency in 180 min. Overall, the photocatalytic efficiency remained almost unchanged after five consecutive degradation cycles with a methylene blue degradation of 88 ± 3%. These results indicate that these sustainable nanoparticles can be applied in the cleaning of industrial and urban fluids polluted by hazardous organic compounds like dye molecules.

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Green synthesis of CdS Quantum dots for photocatalytic and anti-corrosive applications in aqueous media

Cited by 19 publications

References 50 publications

Evaluation of physiochemical and electrochemical behaviour of reduced grapheme functionalized copper nanostructure as an effective corrosion inhibitor

Evaluation of physiochemical and electrochemical behaviour of reduced grapheme functionalized copper nanostructure as an effective corrosion inhibitor

Carbon Dots for Future Prospects: Synthesis, Characterizations and Recent Applications: A Review (2019–2023)

An effective and sustainable dye removal via sunlight-based photocatalysis and adsorption using eco-friendly and low-cost ZnS nanoparticles: Experiments, modelling, and mechanism

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