Synthesis and characterization of MgO nanocrystals using strong and weak bases

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• 作者：Mehali Mehta^a ; ^c ; Mausami Mukhopadhyay^b ; ^{mmu@ched.svnit.ac.in} ; Robin Christian^a ; Narendra Mistry^a
• 关键词：Magnesium oxide ; Nanomaterials ; Characterization ; X-ray diffraction ; Strong bases ; Weak bases
• 刊名：Powder Technology
• 出版年：2012
• 期刊代码：144_00325910
• 类别：et
• 出版时间：August, 2012
• 卷：226
• 期：Complete
• 页码：213-221
• 文件大小：2390 K

摘要

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 1 N KOH/NaOH < NH₄OH < Na₂CO_3. Nanocrystal MgO synthesized by 1 N, 3 N and 5 N KOH were of the same size 21 nm, 24 nm and 24 nm respectively as formed with 1 N, 3 N and 5 N NaOH base. Crystallite size of MgO synthesized by 3 N NH₄OH and Na₂CO₃ was less compared to that synthesized by 1 N and 5 N 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.