摘要
采用水合肼作还原剂,在有柠檬酸存在的情况下,以FeCl2为铁源,通过液相化学还原制备粒径为15～50 nm的单质铁纳米颗粒.采用X射线衍射（XRD）、X射线能谱仪（EDS）和场发射扫描电镜（FESEM）对制备的Fe纳米粒子的结构、组成和形貌进行了表征,并使用超导量子干涉仪（SQUID）对制备的Fe纳米粒子的磁学性能进行了表征.研究结果表明,在柠檬酸存在下,可以用肼在常温常压下液相还原亚铁离子制备出单质铁纳米颗粒,改变络合剂后还原无法进行,并对可能的反应机理进行了讨论.
The preparation of nanomaterials is a great challenge in the fields of synthetic chemistry and materials science, because materials with nanoscale and micro-scale structure have unique properities. Nanostructures with controlled size and shape are important from both fundamental application and technological viewpoints. In fact, it is well-known that the size and shape are two primary variables determining physical （such as magnetic, optical, etc. ） as well as chemical（reactivity, catalysis, etc. ） properties of nanoparticles. Here a simple method for the synthesis of iron nanoparticles under a relative mild condition by developing effective synthetic technique is reported. Using this method, iron nanoparticles with particle sizes about 15--50 nm were prepared by the reduction of ferrous chloride with hydration hydrazine in aqueous solution at room temperature, with citric acid＇s appearance. The resulting metallic powders were characterized by XRD, EDX and FESEM. The magnetic performance of the obtained Fe nanoparticles were also discussed.
出处
《高等学校化学学报》
SCIE
EI
CAS
CSCD
北大核心
2008年第10期2020-2024,共5页
Chemical Journal of Chinese Universities
基金
吉林省杰出青年基金(批准号:20040117)资助
关键词
纳米铁
磁性材料
液相化学合成
Nano metallic iron
Magnetic materials
Liquid phase chemical synthesis
