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Abstract
Nanoparticles of magnesium oxide (MgO) have been prepared by low temperature solution combustion and hydrothermal method respectively. Powder X-ray diffraction (PXRD) patterns of MgO samples prepared by both the methods show cubic phase. The Scanning Electron Microscopy (SEM) studies reveal, the combustion derived product show highly porous, foamy and fluffy in nature than hydrothermally derived sample. The optical absorption studies of MgO show surface defects in the range 250–300nm. The absorption peak at ∼290nm might be due to F-centre. Photoluminescence (PL) studies were carried upon exciting at 290nm. The sample prepared via combustion method show broad emission peak centred at ∼395nm in the bluish-violet (3.14eV) region. However, in hydrothermal prepared sample show the emission peaks at 395 and 475nm. These emission peaks were due to surface defects present in the sample since nanoparticles exhibits large surface to volume ratio and quantum confinement effect.
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Schedule a callMore From: Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy
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