Optimization of Conditions for Obtaining Stable Hydrosols of Magnetite Nanoparticles

IF 0.5 Q4 CHEMISTRY, MULTIDISCIPLINARY Journal of Siberian Federal University. Chemistry Pub Date : 2020-03-01 DOI:10.17516/1998-2836-0165

T. Trofimova, S. Saykova, D. Karpov, D. I. Chistyakov, A. Pavlikov

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Abstract

The work is devoted to the study of the influence of reaction parameters on the qualitative and quantitative composition of magnetite nanoparticles. The method of their synthesis is optimized using the method of mathematical planning and processing of experimental data. The mathematical model is obtained. It was established that the molar ratio of iron (II) and (III) ions, the time of preliminary boiling of distilled water for preparing solutions, the presence of an inert atmosphere of nitrogen, as well as an excess of alkali affect the formation of a stoichiometric product. Monophase magnetite nanoparticles with an average diameter of 8-12 nm were obtained under optimal conditions. The product is characterized by the methods of transmission electron microscopy and X-ray phase analysis. The effect of pretreatment of magnetite nanoparticles with solutions of strong mineral acids on the stability of its hydrosols has been studied by dynamic and electrophoretic light scattering. It was established that the best stabilization is achieved by pretreatment of magnetite with a solution of perchloric acid

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制备磁性纳米颗粒稳定水溶胶的条件优化

研究了反应参数对纳米磁铁矿的定性和定量组成的影响。采用数学规划和实验数据处理的方法优化了它们的合成方法。建立了数学模型。确定了铁(II)和(III)离子的摩尔比、蒸馏水预备沸腾的时间、氮气惰性气氛的存在以及过量的碱对化学计量产物的形成有影响。在最佳条件下，制备了平均直径为8 ~ 12 nm的单相磁铁矿纳米颗粒。通过透射电子显微镜和x射线相分析对产物进行了表征。采用动态光散射法和电泳光散射法研究了强矿物酸溶液预处理磁铁矿纳米颗粒对其水溶胶稳定性的影响。结果表明，用高氯酸溶液对磁铁矿进行预处理，稳定效果最好

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Journal of Siberian Federal University. Chemistry CHEMISTRY, MULTIDISCIPLINARY-

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1.10

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