Abstract This study focus on specifying the roles of solvent ethylene glycol (EG) and polymers for synthesis of uniformly distributed magnesium oxide (MgO) nanoparticles with average crystallite size of around 50 nm through a modified polyol method. Based on different characterization results, it was concluded that, Mg2+ ions was precipitated by the −OH and CO32− ions decomposed from urea in ethylene glycol (EG) medium (CO(NH2)2 → NH3 + HNCO, HNCO + H2O → NH3 + CO2), thus forming well crystallized Mg5(CO3)4(OH)2 (H2O)4 precursor which could be converted to MgO by calcination. Surface protectors PEG and PVP have no obvious influences on cyrtsal structure, morphology and size uniformity of as-prepared precursors and target MgO nanoparticles. In comparison with polymers PEG and PVP, solvent EG plays an important role in controlling the morphology and diameter uniformity of MgO nanoparticles.

中文翻译：

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乙二醇溶剂和聚合物在制备均匀分布的氧化镁纳米粒子中的作用

摘要 本研究的重点是指定溶剂乙二醇 (EG) 和聚合物在通过改进的多元醇方法合成平均晶粒尺寸约为 50 nm 的均匀分布的氧化镁 (MgO) 纳米粒子中的作用。基于不同的表征结果，可以得出结论，Mg2+ 离子在乙二醇 (EG) 介质（CO(NH2)2 → NH3 + HNCO，HNCO + H2O → NH3 + CO2)，从而形成结晶良好的 Mg5(CO3)4(OH)2 (H2O)4 前体，可通过煅烧转化为 MgO。表面保护剂 PEG 和 PVP 对制备的前驱体和目标 MgO 纳米粒子的晶体结构、形态和尺寸均匀性没有明显影响。与聚合物 PEG 和 PVP 相比，