a-Fe_2O_3纳米棒的制备研究

采用压力–热晶法,制得棒状的前躯体后再在600℃焙烧8 h,成功地制得直径在20~40 nm,长度在300~500 nm之间,均匀分散、疏松多孔的六方结构的棒状Fe2O3纳米粒子,并用透射电子显微镜、电子衍射、X射线衍射等技术手段对样品进行了表征,考察了制备条件对产物粒径、形貌的影响。结果表明:初始铁盐浓度对产物粒径影响不明显,可以在较高初始浓度下制备Fe2O3纳米粒子;pH值、初始压力对粒子形貌和大小有一定的影响。

Study on Preparation of -Fe_2O_3 Nanorods

The porous -Fe2O3 nanorods were successfully prepared by annealing precursor powders, which were produced by pressure-thermalcrystallization method using FeCl3·6H2O as raw material. Microstructure and morphology of the prepared products had been characterized by means of transmission electron microscopy(TEM),selected area electron diffraction(SAED) and X-ray diffraction(XRD). The results show the particle has rod-like apparent structure. The diameter and the length of the particle are 20~40 nm and 300~500 nm, respectively. The influences of reaction pressure and acidity on the formation, morphology and particle size of Fe2O3 nanorods are also investigated.