磁性纳米四氧化三铁的制备工艺及其表面改性  

Preparation and surface modification of magnetic nano-Fe_3O_4

作　　者：赵晓东[1] 冯启明[1] 王维清[1] 

机构地区：[1]西南科技大学固体废弃物处理与资源化省部共建教育部重点实验室,四川绵阳621010

出　　处：《应用化工》2010年第2期171-174,共4页Applied Chemical Industry

基　　金：国家自然科学基金资助项目(50804039)

摘　　要：采用共沉淀法制备纳米Fe3O4胶体溶液,并用油酸钠对其进行包覆改性。制备了不同条件下的纳米Fe3O4粒子,用X射线分析仪、振动样品磁强计、扫描电子显微镜、傅立叶红外光谱仪对产品进行分析表征。探讨了制备纳米Fe3O4的最佳工艺条件以及油酸钠改性的可行性。结果表明,Fe3+和Fe2+的摩尔比为4∶2时,反应1.0 h,50℃晶化1.0 h,制备的Fe3O4晶粒度为11.2 nm,磁饱和强度为56.337 emu/g;油酸钠用于Fe3O4改性,包覆效果良好。The preparation of Fe3O4 nanoparticle with chemical co-precipitation method, and surface modification by sodium oleate were introduced. Nano-Fe3O4 particles were prepared under different conditions, the properties of the particle were measured by XRD, VSM, SEM and FTIR. The optimum preparation conditions of nano-Fe3O4 and the feasibility of the surface modification by sodium oleate were discussed. The results showed that the optimum performance is as follows ： the molar ratio of Fe3 ＋ to Fe2 ＋ 4 ： 2, reaction temperature 50℃, reaction time 1 h, crystallization time 1 h, its grain size is 11.2 nm and saturated magnetic intensity is 56. 337 emu/g;sodium oleate is good for surface modification of nano-Fe3O4.

关 键 词：纳米FE3O4 化学共沉淀法 表面改性 

分 类 号：TQ032[化学工程]