Synthesis, structural and luminescence studies of magnesium oxide nanopowder

Devaraja, P.B.; Avadhani, D.N.; Prashantha, S.C.; Nagabhushana, H.; Sharma, Saurabh; Nagabhushana, B.M.; Nagaswarupa, H.P.

doi:10.1016/j.saa.2013.08.050

Cited by 110 publications

(43 citation statements)

References 46 publications

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“…A higher value of E g = 4.51 eV was found for MgO nanowires synthesized by solvothermal method [36]. The values of the band gap in the range from 4.1 to 4.6 eV were found for nanoparticles obtained by chemical precipitation [37] and E g = 4.2 eV for nanoparticles deposited by spray pyrolysis [38]. Larger band gap values found in these studies were attributed to the small size of nanoparticles.…”

Section: Resultsmentioning

confidence: 59%

Surface Morphology, Structural and Optical Properties of MgO Films Obtained by Spray Pyrolysis Technique

et al. 2016

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X-ray diffraction, atomic force microscopy, field emission scanning electron microscopy, UV-visible photometry, and photoluminescence measurements were used to investigate the surface morphology and structural and optical properties of MgO films. Magnesium oxide films deposited by the spray pyrolysis technique were studied. The substrate temperature was varied from Ts = 643 K to 693 K. Magnesium chloride hexahydrate (MgCl2 ·6H2O), dissolved in deionized water, was used as the precursor solution. It was established that the single phase films crystallize into a cubic structure with very fine crystallite size (about 2 nm). The optical band gaps of the samples were varied from 3.64 eV to 3.70 eV. Also, the films have a high level of transmittance of 90%. Photoluminescence spectra show the emission peaks at approximately 412 nm (3.00 eV) and 524 nm (2.38 eV). The peak with the energy of 3.00 eV is ascribed to holes trapped in magnesium ion vacancies acting as acceptors (F + center). The broad emission peak at 524 nm is related to the presence of defects (F − centers) associated with oxygen ion vacancies.

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Section: Resultsmentioning

confidence: 59%

Surface Morphology, Structural and Optical Properties of MgO Films Obtained by Spray Pyrolysis Technique

et al. 2016

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“…Such type of morphology is the inherent nature of the combustion derived samples. Further, the dopant concentration does not influence the morphology of the sample but a fuel plays an important role in producing powders with proper distribution and less agglomeration[41]. The porous powders are highly friable which facilitates easy grinding to obtain finer particles.…”

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confidence: 99%

Tunable white light emissive Mg2SiO4:Dy3+ nanophosphor: Its photoluminescence, Judd–Ofelt and photocatalytic studies

et al. 2016

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“…The emission peak centered at 402 nm (3.08 eV, Violet Luminescence) was related to intrinsic defects namely oxygen vacancies, F-centers/F + -centers/surface states, this value was in close agreement with reported results in ref. [27,28]. The energy levels of these intrinsic defects were found in the forbidden energy gap of MgO.…”

Section: Photoluminescence Spectramentioning

confidence: 96%

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, structural and luminescence studies of magnesium oxide nanopowder

Cited by 110 publications

References 46 publications

Surface Morphology, Structural and Optical Properties of MgO Films Obtained by Spray Pyrolysis Technique

Surface Morphology, Structural and Optical Properties of MgO Films Obtained by Spray Pyrolysis Technique

Tunable white light emissive Mg2SiO4:Dy3+ nanophosphor: Its photoluminescence, Judd–Ofelt and photocatalytic studies

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

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