Insights into local atomic structure of Fe alloyed ZnS nano crystals: Correlation with structural, optical, magnetic and photocatalyst properties

Ghorai, Soumendra; Patra, N.; Pal, Ajit; Bhattacharyya, D.; Jha, S. N.; Ray, Bishwajit; Chatterjee, Sandip; Ghosh, Anup K.

doi:10.1016/j.jallcom.2019.06.357

Cited by 16 publications

(10 citation statements)

References 55 publications

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“…The influence of oxygen ion on the electronic properties of undoped and doped ZnS with Fe or Mn ions was investigated by replacing one sulfur ion with an oxygen ion. The 3d 10 4s 2 , 3d 6 4s 2 , 3d 5 4s 2 , 3s 2 3p 4 and 2s 2 2p 4 electrons related to Zn, Fe, Mn, S and O atoms were used for the pseudopotential arrangements, respectively. The absorption coefficient (α(ω)), the refractive index (n), extinction coefficient (k), the real and imaginary dielectric parts (ε1, ε2) and the optical conductivity (σ(ω)) were calculated using the Kramers-Kronig relations [25,26].…”

Section: Methodsmentioning

confidence: 99%

“…This light absorption edge can be redshifted upon doping the material with a suitable dopant element [3]. For example, as the semiconductor materials doped with transition metals such as Ni, Co, Mn, Fe…, the formed materials exhibited more exotic characteristics because of spin-spin exchange interactions [4][5][6][7][8]. For instants, doping ZnCdSe/ZnS core/shell quantum dots with Fe, the emission intensity was improved [9].…”

Section: Introductionmentioning

confidence: 99%

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Modifying the Electronic and Optical Properties of Nano ZnS via Doping With Mn and Fe

Mohamed

Shimy

et al. 2021

Preprint

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5% Fe and Mn-doped nano ZnS (Zn0.95A0.05S, A=Fe or Mn) was prepared using the thermolysis technique. The effect of Fe and Mn doping on the lattice parameter, crystallite size, and lattice microstrain was examined applying Rietveld refinement. The analysis showed the incorporation of Fe and Mn substitutionally for Zn ions; a result confirmed by Fourier transforms infrared spectroscopy spectra from the shift in the vibration bands upon doping. The energy of ZnS band gap was reduced by doping, giving ZnS new applications. The different defects inside the different samples were investigated using photoluminescence spectroscopy. The effect of Fe/ Mn doping and incorporation of atmospheric oxygen on the bandgap characteristics, the absorption, optical conductivity, refractive index and the extinction coefficient, reflectance, the real and imaginary parts of the dielectric constant were explored using density function theory calculation (DFT).

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Modifying the Electronic and Optical Properties of Nano ZnS via Doping With Mn and Fe

Mohamed

Shimy

et al. 2021

Preprint

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“…Biogenic ZnS quantum dots photodegraded 88% of organic dyes under sunlight after 8 h [27]. However, most of the reports on the use of ZnS quantum dots as photocatalysts showed that they suffer from low photodegradation efficiency [28][29][30]. Hence, the search for highly efficient ZnS quantum photocatalysts is a continuing effort.…”

Section: Introductionmentioning

confidence: 99%

Photocatalytic Degradation of Single and Binary Mixture of Brilliant Green and Rhodamine B Dyes by Zinc Sulfide Quantum Dots

Ajibade

Oluwalana

2021

Molecules

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We present the preparation of octadecylamine-capped ZnS quantum dots from bis(morpholinyldithiocarbamato)Zn(II) complex. The complex was thermolyzed at 130 °C in octadecylamine at different times, to study the effect of reaction time on the morphological and photocatalytic properties of the ZnS quantum dots. Powder X-ray diffraction patterns confirmed a hexagonal wurtzite crystalline phase of ZnS, while HRTEM images showed particle sizes of about 1–3 nm, and energy band gaps of 3.68 eV (ZnS–1), 3.87 eV (ZnS–2), and 4.16 eV (ZnS–3) were obtained from the Tauc plot for the ZnS nanoparticles. The as-prepared ZnS were used as photocatalysts for the degradation of brilliant green, rhodamine B, and binary dye consisting of a mixture of brilliant green-rhodamine B. The highest photocatalytic degradation efficiency of 94% was obtained from ZnS–3 with low photoluminescence intensity. The effect of catalytic dosage and pH of the dyes solution on the photocatalytic process shows that pH 8 is optimal for the degradation of brilliant green, while pH 6.5 is the best for photocatalytic degradation of rhodamine B. The degradation of the binary dyes followed the same trends. The effect of catalytic dosage shows that 1 mg mL−1 of the ZnS nano-photocatalyst is the optimum dosage for the degradation of organic dyes. Reusability studies show that the ZnS quantum dots can be reused five times without a significant reduction in degradation efficiency.

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“…ZnS films doped with metal ions have improved optical properties (Karar, Singh & Mahta, 2004;Zhao et al, 2017). There are various studies on the photoluminescence properties of ZnS nanostructures doped with various metals such as Cu, Mn, Co, Fe, Ni and other transition elements (Ghorai et al, 2019;Bouznit et al, 2014;Kumar et al, 2015;Talantikite-Touatia et al, 2017). These doping processes provide photoluminescence bands in different regions such as in orange region by Mn, green region by Eu and blue region by Cu doping (Ebrahimi, Yarmand & Naderi 2019;Wei et al, 2018;Mishra, Ojha & Khare 2018).…”

Section: Introductionmentioning

confidence: 99%

Preparation and Characterization of Nickel-Doped Zinc Sulphide Thin Films for Solar Cell Applications

Küçükarslan¹,

Demirselçuk²,

Kuş³

et al. 2021

JSTR

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This study presents the production of pure and different amounts of Ni-doped (4, 8, 12%) ZnS films on microscope glass substrate at 4005°C substrate temperature with Ultrasonic Spray Pyrolysis Technique and the effect of Ni doping on some physical properties of pure films. X-ray diffractometer (XRD), UV-Vis spectrophotometer, two-probe method and atomic force microscope (AFM) were used to analyze the structural, optical, electrical and surface properties of all films, respectively. XRD patterns contains broad peaks showing a low crystallinity level for the films. Ni doping caused ZnS films to have high absorbance values through the visible spectrum. Optical band gap energy values of ZnS:Ni thin films were determined to be between 3.71-3.96 eV. Two-probe measurements revealed that the electrical conductivity values of ZnS films increased significantly depending on the Ni doping. AFM results showed that the films have an almost homogeneous distribution with a rough surface. No significant change was observed for the surface properties of the films due to the Ni doping. As a result of all analyzes; it was seen that Ni doping has an important effect on the optical and electrical properties of ZnS films, without modifying the crystalline structure or surface texture.

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Insights into local atomic structure of Fe alloyed ZnS nano crystals: Correlation with structural, optical, magnetic and photocatalyst properties

Cited by 16 publications

References 55 publications

Modifying the Electronic and Optical Properties of Nano ZnS via Doping With Mn and Fe

Modifying the Electronic and Optical Properties of Nano ZnS via Doping With Mn and Fe

Photocatalytic Degradation of Single and Binary Mixture of Brilliant Green and Rhodamine B Dyes by Zinc Sulfide Quantum Dots

Preparation and Characterization of Nickel-Doped Zinc Sulphide Thin Films for Solar Cell Applications

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Insights into local atomic structure of Fe alloyed ZnS nano crystals: Correlation with structural, optical, magnetic and photocatalyst properties

Cited by 16 publications

References 55 publications

Modifying the Electronic and Optical Properties of Nano ZnS&nbsp;via Doping With Mn and Fe

Modifying the Electronic and Optical Properties of Nano ZnS&nbsp;via Doping With Mn and Fe

Photocatalytic Degradation of Single and Binary Mixture of Brilliant Green and Rhodamine B Dyes by Zinc Sulfide Quantum Dots

Preparation and Characterization of Nickel-Doped Zinc Sulphide Thin Films for Solar Cell Applications

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Modifying the Electronic and Optical Properties of Nano ZnS via Doping With Mn and Fe

Modifying the Electronic and Optical Properties of Nano ZnS via Doping With Mn and Fe