Synthesis of Zn2+-doped MgO nanoparticles using substituted brucite precursors and studies on their optical properties

Sharma, Urvashi; Jeevanandam, P.

doi:10.1007/s10971-015-3734-0

Cited by 21 publications

(3 citation statements)

References 40 publications

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“…Kumar et al [ 15 ] and Li et al [ 16 ] have shown that possibly the existence of oxygen vacancies and adsorbed H

species are important for the appearance of RTFM in MgO nanocrystals or thin films, respectively. Ion doping also influences the optical and electro-optical properties of MgO NPs [ 17 , 18 , 19 , 20 , 21 , 22 ].…”

Section: Introductionmentioning

confidence: 99%

Magnetic, Optical and Phonon Properties of Ion-Doped MgO Nanoparticles. Application for Magnetic Hyperthermia

2023

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The influence of size and doping effects on the magnetization M, phonon ω and band gap energy Eg of MgO nanoparticles is studied using a microscopic model. The room-temperature ferromagnetism is due to surface or/and doping effects in MgO nanoparticles (NPs). The influence of the spin–phonon interaction is discussed. M increases with decreasing NP size. M and Eg can increase or decrease by different ion doping (Co, Al, La, Fe) due to the different strain that appears. It changes the lattice parameters and the exchange interaction constants. We found that MgO NP with size of 20 nm and Fe- or Co-doping concentration x = 0.1 and x = 0.2, respectively, have a Curie temperature TC = 315 K, i.e., they are appropriate for application in magnetic hyperthermia, they satisfy the conditions for that. The energy of the phonon mode ω = 448 cm−1 increases with decreasing NP size. It increases with increasing Co and Fe, or decreases with Sr ion doping.

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“…Kumar et al [ 15 ] and Li et al [ 16 ] have shown that possibly the existence of oxygen vacancies and adsorbed H

Section: Introductionmentioning

confidence: 99%

Magnetic, Optical and Phonon Properties of Ion-Doped MgO Nanoparticles. Application for Magnetic Hyperthermia

2023

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“…Dopants in nanocrystals lead to phenomena not found in the bulk because their electronic states are confined to a small Volume [17]. However, the dopant impurities have tuned the properties of metal oxide nanoparticles in MgO [18][19][20]. Therefore, these dopants can be altered the properties, as in demand for their industrial requests as a magnetic sensor, optical, switching device, and as diluted magnetic semiconductor [18,21], by modifying the energy gap [22,23], the magnetic properties [24,25], the antibacterial effect [26], the optical [24,27], the conduction [28] and the Photoluminescence [29] properties.…”

Section: Introductionmentioning

confidence: 99%

Structural Characterization of (Mg(1-x)pbxO)-NPs by Modified Pechini Method

Najem¹,

Rasin²,

Edrees³

2022

ETJ

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 The structure revealed that all the specimens have identical space groups and index well to a cubic structure.  Crystallite size was increased with increasing the fraction of doping except for (Mg0.97Pb0.03O) due to the formation of PbO oxide.  The molecular vibration of the pure and doped specimens has the same framework.  As the incorporation of Pb 2 + ions increased, the bands got broader, and the intensities increased in the range of 800-400 cm -1 . The structural characterization was discussed in the present paper of the pure MgO nanoparticles and the doped (Mg(1-x)pbxO) nanoparticles specimens, where (0 ≤ x ≤ 0.03). The modified Pechini method was used to prepare all the specimens. From (DTA), the convenient temperature of decomposition from Mg(OH)2 to MgO was above 375°C. The structure investigation (XRD) revealed that all the specimens have identical space groups and index well to cubic structures. The obtained crystallite size by Scherrer's equation was increased with increasing the fraction of doping except for (Mg0.97Pb0.03O) due to the formation of PbO oxide. The molecular vibration by FTIR demonstrated that all the pure and doped specimens have the same framework. As the incorporation of Pb2+ ions increases, the bands get broader, and the intensities increase in the ranging 800-400 cm-1 due to vibrations of O-Mg and O-Pb bands, respectively.

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“…MgO is doped by Zn to obtain a luminescence material with any band gap between their band gaps and shift the emitted light in the visible region. Sharma et al [15] have reported the synthesis of Zn doped MgO with a different Zn 2+ ratio that could emit light in UV and Blue region. Recently, Vasanthi et al [6] reported that Zn doped MgO nanoparticles generated a bright bluish green emission (450 nm to 570nm) when excited with near UV light (330 nm to 380 nm).…”

Section: Introductionmentioning

confidence: 99%

Ultraviolet and violet-blue emission of Zn doped MgO/mg(OH)2 particles prepared by one step spray pyrolysis method

Florena

Maulana

Faizal

et al. 2018

J. Pow. Tech. Adv. Funct. Mater.

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Spherical particles of Zn doped MgO were prepared by one-step spray pyrolysis method. The crystalline nature and particle size of the samples were characterized by X-ray diffraction analysis (XRD). The morphology of samples was studied by scanning electron microscope (SEM) and the presence of Zn in the sample was confirmed by energy dispersive X-ray analysis (EDX). The optical properties of the samples were investigated using photoluminescence spectroscopy (PL) analysis to obtain excitation and emission spectra of the samples. Results indicated that the doped MgO particles exhibited a cubic structure without hexagonal wurtzite structure as the Zn concentrations were increased. Spherical shape and porous particles are found with increasing of doping concentration. The optical band gap of MgO altered with the addition of doping concentration. A considerable redshift of about ~0.08 -0.13 eV in the excitation spectra of 2.22 eV emission band was revealed in Zn doped MgO samples. It was highlighted that Zn doped MgO prepared by the spray pyrolysis generated emission at UV-Vis wavelength required for many applications.

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Synthesis of Zn2+-doped MgO nanoparticles using substituted brucite precursors and studies on their optical properties

Cited by 21 publications

References 40 publications

Magnetic, Optical and Phonon Properties of Ion-Doped MgO Nanoparticles. Application for Magnetic Hyperthermia

Magnetic, Optical and Phonon Properties of Ion-Doped MgO Nanoparticles. Application for Magnetic Hyperthermia

Structural Characterization of (Mg(1-x)pbxO)-NPs by Modified Pechini Method

Ultraviolet and violet-blue emission of Zn doped MgO/mg(OH)2 particles prepared by one step spray pyrolysis method

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