A simple, environmentally friendly hydrothermal stripping route for synthesizing highly size-controlled spherical ferric oxide nanoparticles was developed that involved stripping ferric ion from iron-loaded organic phase. The particle size was found to be influenced by the initial concentration of iron in organic phase, stripping temperature and time, and a mathematical model about the size was established based on the experimental results and theoretical analysis. The model suggests that the process apparent activation energy of stripping iron from organic phase is 97.3 kJ·mol−1, the energy of crystal growth is 51.6 kJ·mol−1, and the synthesis of Fe2O3 is controlled by the crystal growth of embryo at low temperature (T < 590 K). The sizes calculated by the model comparatively accord with the experimental data and this provides a method for controlling the sizes.
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机译：开发了一种简单，环保的热液汽提路线，用于合成高度受尺寸控制的球形三氧化二铁纳米颗粒，该方法涉及从负载铁的有机相中剥离铁离子。发现颗粒大小受有机相中铁的初始浓度，汽提温度和时间的影响，并基于实验结果和理论分析建立了有关该大小的数学模型。该模型表明，从有机相中汽提铁的过程表观活化能为97.3 kJ·mol -1 ，晶体生长的能量为51.6 kJ·mol -1 ， Fe 2 O 3 的合成受低温（T <590 K）胚的晶体生长控制。通过模型计算得出的尺寸与实验数据相对符合，这提供了一种控制尺寸的方法。
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