Synthesis of Ni:ZnS quantum dots and investigation of their properties

Şahi̇n, Ömer; Horoz, Sabit

doi:10.1007/s10854-018-9771-z

Cited by 14 publications

(5 citation statements)

References 20 publications

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“…According to the literature [28,29], the broad peak is an indication of small and fine NPs (nanoscale crystalline particles) while the narrow or low intensity peak signifies low crystallinity of the NPs. As shown in Figure 3(b) and Table 1, the average particle diameter (D) of the biosynthesized ZnO-NPs, which calculated using the Debye-Scherrer equation (Equation (2), were between 18.53 and 30.38 nm [30][31][32]. e dislocation density (δ) of the fabricated samples is specified using the Williamson and Smallman's relation (Equation ( 3)) [33,34].…”

Section: Xrd Analysismentioning

confidence: 99%

Pomegranate Peel Extract-Mediated Green Synthesis of ZnO-NPs: Extract Concentration-Dependent Structure, Optical, and Antibacterial Activity

Alnehia

Al-Odayni

Al-Sharabi

et al. 2022

Journal of Chemistry

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Plant-based nanoparticles (NPs) have many advantages over physical and chemical methods and featured with several medicinal and biological applications. In this study, zinc oxide NPs (ZnO-NPs) were synthesized using pomegranate peel aqueous extract, under mild and ecofriendly conditions. The ZnO-NPs structure, morphology, and optical properties were investigated using X-ray diffraction (XRD), scanning electron microscope (SEM), Fourier transform infrared (FTIR), and ultraviolet-visible (UV-Vis). Antibacterial activity against Gram-positive and Gram-negative strains were evaluated using the disk diffusion method. The effect of extract concentration (20, 30, and 40 mL) on the final properties of NPs, as well as the NPs concentration used for antibacterial test (50, 100, and 200 mg/mL), were also studied. The results indicate a hexagonal structure with particle size increases as extract concentration increase (D = 18.53, 29.88, and 30.34 nm), while the optical bandgap was decreased (Eg = 2.87, 2.80, and 1.92 eV). The antibacterial activity of ZnO-NPs indicated high efficiency, similar or even higher than that of the control azithromycin, more against S. aureus, increased with NPs concentration, and preferred when NPs prepared from high extract concentration. Such promising physicochemical properties support the usefulness and efficacy of the reported bio-route for production of ZnO-NPs and may encourage its application for large-scale production.

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Section: Xrd Analysismentioning

confidence: 99%

Pomegranate Peel Extract-Mediated Green Synthesis of ZnO-NPs: Extract Concentration-Dependent Structure, Optical, and Antibacterial Activity

Alnehia

Al-Odayni

Al-Sharabi

et al. 2022

Journal of Chemistry

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“…When Eu is doped into ZnS, five emission peaks were observed at 574, 591, 617, 700 and 754 nm due to the transitions 5 D 0 -7 F 6 , 7 F 4 , 7 F 2 , 7 F 1 and 7 F 0 respectively. 5,11,12,31 In case of Ni, Eu co-doped ZnS, the emission peak observed at 520 nm is associated with 3 T 1 -3 A 2 transition within the 3 F of the free Ni 2+ ions. 27,32 This Gas sensing study.-As n-type semiconductors, ZnS play a significant role in gas sensing.…”

Section: Resultsmentioning

confidence: 96%

“…The broad Photoluminescence peak centered at 450 nm may be due to radiative recombination involving defect states in the ZnS. 5,11 With dopants concentration, the intensity of this peak was enhanced due to creation of defect states. When Eu is doped into ZnS, five emission peaks were observed at 574, 591, 617, 700 and 754 nm due to the transitions 5 D 0 -7 F 6 , 7 F 4 , 7 F 2 , 7 F 1 and 7 F 0 respectively.…”

Section: Resultsmentioning

confidence: 99%

“…Zinc sulfide (ZnS, E g = 3.54 eV) was used as a substantial phosphor for applications in optoelectronics, photonics, photovoltaic (PVs) systems, electrochemical applications and photocatalysts. [5][6][7][8] Kavya Kalidasan et al 6 has introduced metal components that allows for the adjustment of both the valence band (VB) and conduction band (CB) of semiconducting nanoparticles. Typically, this metal doping process results in a reduction of the band gap, consequently improving the light absorption capacity of photocatalysts.…”

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confidence: 99%

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Synthesis and Properties of Eu and Ni Co-Doped ZnS Nanoparticles for the Detection of Ammonia Gas

Ankinapalli,

G. S.,

Kurugundla

et al. 2024

ECS J. Solid State Sci. Technol.

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Zinc sulfide nanoparticles were synthesized successfully via chemical co-precipitation, both in undoped form and co-doped with Europium (Eu) and Nickel (Ni). All prepared samples exhibited cubic blended structure as confirmed by X-ray diffraction (XRD). The average particle size ranged from 3 to 6 nm for both pure and (Eu, Ni) co-doped ZnS, with no alteration in the crystal structure due to Eu and Ni co-doping. However, increasing the Ni dopant concentration (0, 2, 4, & 6 at. %) while maintaining a constant Eu concentration (4 at. %) led to an enhancement in the crystallite size. This was further validated by transmission electron microscopy (TEM), which showed particle sizes consistent with the XRD findings (3-5 nm). Microscopic analysis via scanning electron microscopy and TEM revealed spherical agglomerated morphology for the (Eu, Ni) co-doped nanoparticles. Energy-dispersive X-ray spectroscopy spectra confirmed the stoichiometric chemical composition of ZnS: Eu, Ni. Photoluminescence studies demonstrated an increased intensity of green luminescence at 6 at.% Ni co-dopant concentration. Moreover, the synthesized samples exhibited promising gas sensing properties, particularly towards ammonia gas, with good selectivity. Notably, both pure and (Eu, Ni) co-doped ZnS nanoparticles showed rapid response and recovery times at room temperature, suggesting their potential applicability in gas sensing applications.

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“…These results corroborated the successful syntheses of the MnO 2 NFs and ZnSQDs. 35,36 The zeta potentials of the ZnSQDs, MnO 2 NFs, MnO 2 NFs/ PDDA, AgNPs, and MnO 2 NFs/PDDA-AgNPs were measured to determine the overall charge of the materials. The zeta potential approximates the potential of the electrostatic charge on the surface of a material in an aqueous solution.…”

Section: Characterization Of the Synthetic Nanomaterialsmentioning

confidence: 99%

A dual-emitting immunosensor based on manganese dioxide nanoflowers and zinc sulfide quantum dots with enhanced electrochemiluminescence performance for the ultrasensitive detection of procalcitonin

Wang

Yang

Zhi

et al. 2023

Analyst

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Synthesis of Ni:ZnS quantum dots and investigation of their properties

Cited by 14 publications

References 20 publications

Pomegranate Peel Extract-Mediated Green Synthesis of ZnO-NPs: Extract Concentration-Dependent Structure, Optical, and Antibacterial Activity

Pomegranate Peel Extract-Mediated Green Synthesis of ZnO-NPs: Extract Concentration-Dependent Structure, Optical, and Antibacterial Activity

Synthesis and Properties of Eu and Ni Co-Doped ZnS Nanoparticles for the Detection of Ammonia Gas

A dual-emitting immunosensor based on manganese dioxide nanoflowers and zinc sulfide quantum dots with enhanced electrochemiluminescence performance for the ultrasensitive detection of procalcitonin

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