水热反萃法制备纳米α-Fe_2O_3

Preparation of Nanosized α-Fe_2O_3 by Hydrothermal Stripping Process

应用水热反萃技术从负载铁的环烷酸 异辛醇 煤油有机相中制备了α Fe2 O3 纳米粉末。红外光谱分析表明环烷酸在实验条件下是稳定的 ;TEM表明 ,制得的粉末颗粒组成均一、结晶完好、近似椭球形 ,平均粒径在 2～ 30nm范围 ,此法不产生环境污染。粉末的粒度可以通过改变铁浓度、水相pH值、温度、反萃时间和加入表面活性物质等措施得到控制。

The technique of hydrothermal stripping was applied to prepare nanosized α-Fe 2O 3 powders from iron-loaded organic phase composed of naphthenic acid, isooctyl alcohol and kerosene. Infrared spectra indicated that the naphthenic acid used in the experiments is stable and TEM images showed that the particles of the α-Fe 2O 3 powders are quasi-elliptical sphere in shape and have average diameter ranges from 2 nm to 30 nm. The technique is environmental friend. The investigation showed that the granularity of Fe 2O 3 powders could be controlled by changing iron concentration, reaction temperature, pH of the aqueous phase and stripping time, as well as by addition of surfactants.