Synthesis and characterization of MgO nanocrystals using strong and weak bases
2012
Mehta, Mehali | Mukhopadhyay, Mausami | Christian, Robin | Mistry, Narendra
Magnesium oxide (MgO) nanoparticles were synthesized with varying normality of strong and weak bases using sol-gel method. KOH and NaOH were used as strong base; NH₄OH and Na₂CO₃ were used as weak base for preparation of MgO nanocrystal. The nanocrystal size of MgO increased from strong base to weak base. Crystallite size of MgO was obtained as 1N KOH/NaOH<NH₄OH<Na₂CO₃. Nanocrystal MgO synthesized by 1N, 3N and 5N KOH were of the same size 21nm, 24nm and 24nm respectively as formed with 1N, 3N and 5N NaOH base. Crystallite size of MgO synthesized by 3N NH₄OH and Na₂CO₃ was less compared to that synthesized by 1N and 5N NH₄OH and Na₂CO₃. Yield of MgO increased with increase in the normality of both bases. XRD characterizations were carried out to assure the phase purity of the synthesized MgO powder. Crystallite size of synthesized MgO was obtained by Scherrer's equation from XRD peaks. SEM micrographs showed spherical, filamentous and agglomerated surface structure of synthesized particles with strong and weak bases of different normality.
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