摘要
针对化学共沉淀法制备四氧化三铁(Fe3O4)纳米粒子存在氮气用量多、过程较复杂等不足,在该方法基础上,研究在有氧条件下通过简便方法制备性能相当的磁性Fe3O4纳米粒子。系统地研究了Fe2+和Fe3+的物质的量比、反应温度、沉淀剂浓度及反应体系p H值对Fe3O4纳米粒子形成过程的影响,并利用X射线衍射、透射电子显微镜和振动样品磁强计对所得粒子进行了表征。结果表明:反应体系p H值为12时,在有氧条件下可使Fe2+和Fe3+充分反应形成Fe3O4沉淀;当Fe2+和Fe3+的量比为1∶1、反应温度为50℃、Na OH浓度为0.15 mol/L,可制备出结晶完整、球形、粒径小于20 nm的Fe3O4纳米颗粒,其饱和磁化强度为3.34×105A/m,磁性较强。
Airming at disadvantages for the preparation of Fe3O4 nanoparticles by chemical precipitation method including high dosage of nitrogen,a little complex preparation,based on this method,this paper prepares magnetic Fe3O4 nanoparticles in air atomosphere.The influence of molar ratio of Fe^2+ and Fe^3 +,reactive temperature,concentration of Na OH on formation process of Fe3O4 was systematically studied.X-ray difffraction(XRD),transmission electron microscopy(TEM) and vibrating sample magnetometry(VSM) were used for samples characterization.The results show that Fe2 +and Fe3 +can completely react in the presence of oxygen to obtain Fe3O4 precipitate.The optimum preparation conditions are n(Fe^2 +) :n(Fe^3 +) of 1∶ 1,temperature of 50 ℃ and Na OH concentration 0.15 mol/L.Under these conditions,the Fe3O4 nanoparticles with complete crystal and spherical shape can be prepared.The particle size is smaller than 20 nm.The saturation magnetization is 3.34 × 10^5 A/m,indicating strong magnetism.
出处
《纺织学报》
EI
CAS
CSCD
北大核心
2016年第8期7-11,共5页
Journal of Textile Research
基金
国家自然科学基金项目(51403152)
教育部新世纪优秀人才支持计划项目(NCET-12-1063)
作者简介
杨清玉(1987-),男,硕士生。研究方向为纳米材料制备与应用。
李凤艳,通信作者,E-mail:fengyanli@Ijpu.edu.cn。