A FACILE SYNTHESIS OF SHAPE- AND SIZE-CONTROLLED α- Fe 2 O 3 NANOPARTICLES THROUGH HYDROTHERMAL METHOD

作者：Guanghui Wang, Wen‐Cui Li, Kunming Jia, An‐Hui Lu, Mathias Feyen, Bernd Spliethoff, Ferdi Schüth · 发表于：NANO · 年份：2011 · DOI：10.1142/s1793292011002846 · 被引用次数：10 · 研究领域：Iron oxide chemistry and applications、Minerals Flotation and Separation Techniques、Arsenic contamination and mitigation

α- Fe 2 O 3 nanoparticles have wide-ranging applications such as in catalysis, sensoring, painting, etc. This is the reason to study their controlled synthesis. Here we have investigated the synthesis of uniform α- Fe 2 O 3 nanoparticles using amino acids as morphology control agents. The products were characterized by transmission electron microscopy (TEM), X-ray diffraction (XRD), thermogravimetry (TG) and differential thermal analysis (DTA). It was found that the type and the amount of amino acids as well as the reaction temperatures have significant influence on the shape and size of the obtained α- Fe 2 O 3 nanoparticles. The use of acidic amino acids (always contain C = O in the side chain) typically leads to the formation of α- Fe 2 O 3 nanoparticles with spindle shape. However, rhombohedrally shaped α- Fe 2 O 3 nanoparticles were formed in presence of basic amino acids (always contain - NH 2 in the side chain). Increasing the amount of amino acid generally results in α- Fe 2 O 3 nanoparticles with decreasing particle sizes.