Synthesis of ZnS:Ni nanocrystals (NCs) using a rapid microwave activated method and investigation of the structural and optical properties

Molaei, M.; Karimimaskon, Fatemeh; Lotfiani, A.; Samadpour, Mahmoud; Liu, H.

doi:10.1016/j.jlumin.2013.06.006

Cited by 21 publications

(3 citation statements)

References 28 publications

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“…Undoped ZnS NSs are distinguished by blue light emission with broad bandwidth. Additionally, ZnS doped with different TM ions for instance, Cu, Ni, Mn, and Cd, has an efficient phosphor emitting in the blue-green visible range [9][10][11][12][13][14]. Thus, ZnS doped TM ions have been utilized as a phosphor for light-emitting materials in display devices such as electroluminescence devices, cathode-ray tubes, and field emission devices [15][16][17][18][19].…”

Section: Introductionmentioning

confidence: 99%

Outstanding features of Cu-doped ZnS nanoclusters

et al. 2018

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ZnS and their Cu-doped nanoclusters (NCs) were synthesized successfully using the wet chemical route with different Cu content. The crystalline structure was investigated using x-ray powder diffraction which assured the single-phase formation in cubic symmetry. High-resolution transmission electron microscope indicated the microstructure of NCs with a size ranging from 2-4 nm. A butterfly hysteresis (M-H) loop was observed at room temperature with large values of coercivity for the Cu content of x = 0.05. Photoluminescence emission spectra were recorded from 500-615 nm for pure and Cu-doped ZnS NCs at a 350 nm excitation wavelength. The sample exhibited green fluorescence bands peaking at 535, 544, 552.5, 558.2, and 560.6 nm, which confirmed the characteristic feature of Zn as luminescent centers in the lattice. The additional yellow and orange emissions are due to defect levels or/and impurity centers. The dielectric constant as well as the conductivity values increased with increasing Cu content.

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Section: Introductionmentioning

confidence: 99%

Outstanding features of Cu-doped ZnS nanoclusters

et al. 2018

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“…Zero-dimensional nanoparticles which their sizes are less than 10 nm called quantum dots [1][2][3][4][5]. The unique properties of QDs are dependents to particle size and shape [3][4][5][6][7]. Carbon quantum dots (CQDs) are new generation of QDs that duo to their great chemical stability, unique optical properties, non-toxicity, biocompatibility, and excellent water solubility attracted great attention in these days and which can be used in wide range of applications such as light emitting deods (LEDs), lasers, sensors, and bio imaging [8][9][10][11][12][13][14][15][16].…”

Section: Introductionmentioning

confidence: 99%

Luminescence carbon quantum dots: synthesis using pistachio as precursor, investigating optical properties, application for Co 2+ detection in water media and photodegradation of organic dyes

Farahmandzadeh

Molaei

Alehdaghi

et al. 2022

Preprint

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In this research, carbon quantum dots (CQDs) were synthesized by using pistachio as precursor for the first time with a hydrothermal method in aqueous media. Synthesized QDs were characterized by different analyses such as X-ray diffraction (XRD), transmission electron microscopy (TEM), energy dispersive X-ray spectroscopy (EDS), field emission scanning electron microscopy (FESEM), Fourier transform-infrared spectroscopy (FT-IR), BET, Zeta potential, Raman, photoluminescence (PL) and UV-visible (UV-vis) spectroscopies. The Raman spectroscopy results showed 3.54 value for G/D ratio and this result confirmed that synthesized CQDs are composed of graphitic crystalline structure. Zeta potential measurement of CQDs showed that CQDs had negative charge in their surface and it confirmed a great stability for CQDs. CQDs had blue photo emission with a broad PL peak between 300 to 600 nm with quantum yield of 12%. TEM images showed that synthesized CQDs are spherical with a size of about 7 nm. Heavy metal sensitivity of CQDs were investigated by different heavy metal ions in water media and results showed that PL intensity of CQDs in presence of Co2+ ions decreased and showed CQDs had sensitivity versus Co2+ ions. Photocatalyst activity of CQDs were investigated by different dyes under visible and UV illuminations. The obtained results showed that methylene blue had better degradation with CQDs than methylene orange and rhodamine b. The radical scavenger's results obtained that electrons play the key role in photocatalyst process of CQDs with methylene blue under UV irradiation.

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“…Nanocrystals with zero dimension have been synthesized by different technique like hydrothermal method [1,3,5,6], wet chemical precipitation method [4,7], micro wave assisted chemical synthesis etc. by transitional metal doped ZnS [8]. Dilute magnetic semiconductors (DMS) having room temperature magnetism which attracted researcher because of the exchange interactions between the spins of the dopant atoms and the carriers on semiconductor host.…”

Section: Introductionmentioning

confidence: 99%

Defect persuade paramagnetic properties of nickel doped ZnS nanocrystals and identification of structural, optical, local atomic structure

Ghorai

Bhattacharyya

Patra

et al. 2021

J Mater Sci: Mater Electron

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We have methodically investigated the structural, spectroscopic, local atomic structure and magnetic properties of aquatic Zn1-xNixS (0≤x≤0.04) nanocrystals. The structural study of synthesized samples are observed by X-ray diffraction datas with Rietveld refinement. Proficient decrease of lattice parameters and inter-planar spacing are determined on Zn1-xNixS nanocrystals. The nanocrystalline microstructure is identified by high resolution transmission electron microscopy. The sphalerite morphology of doped samples are observed by scanning electron microscopy. Shrinkage of energy band gap is observed for doped nanocrystals. Defect formation due to doping of Ni ion is observed by photoluminescence spectroscopy with cyan color emission. X-ray absorption spectroscopy is employed for identification of local structures surrounding of Zn and Ni sites of Zn1-xNixS nanocrystals. Extended X-ray absorption fine structure investigation evidenced the existence of nanocluster within the lattice of Zn1-xNixS nanocrystals. X-ray absorption near edge structure studies confirmed incorporation of Ni 2+ in ZnS lattice of Zn1-xNixS nanocrystals. The single pre-edge feature at Ni K-edge is not relying on concentration of Ni dopant in Zn1-xNixS nanocrystals. The presence of interstitial Ni is identified by significant fraction of Ni-Ni scattering paths on doped samples. Zn1-xNixS nanocrystals exhibit defect persuaded paramagnetism at room temperature.

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Synthesis of ZnS:Ni nanocrystals (NCs) using a rapid microwave activated method and investigation of the structural and optical properties

Cited by 21 publications

References 28 publications

Outstanding features of Cu-doped ZnS nanoclusters

Outstanding features of Cu-doped ZnS nanoclusters

Luminescence carbon quantum dots: synthesis using pistachio as precursor, investigating optical properties, application for Co 2+ detection in water media and photodegradation of organic dyes

Defect persuade paramagnetic properties of nickel doped ZnS nanocrystals and identification of structural, optical, local atomic structure

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