【作者】 黄芬； 袁亚莉； 梁俊； 王雄斌； 聂超； 韩玉波； 胡建邦； 唐琼；

【Author】 HUANG Fen,YUAN Ya-li,LIANG Jun,WANG Xiong-bin, NIE Chao,HAN Yu-bo,HU Jian-bang,TANG Qiong (School of Chemistry and Chemical Engineering,University of South China,Hengyang 421001,China)

【机构】 南华大学化学化工学院；

【摘要】 Fe₃O₄磁性纳米粒子（MNPs）表面积大、吸附率高、且在外磁场作用下易于磁液分离,冠醚具有对铀、钍等离子选择性配位的能力。为结合两者的特点和优势,本研究制备了高吸附性能和易于磁液分离的18-冠-6/LA/Fe₃O₄复合磁纳米粒子。其结构经IR、SEM、VSM、DGA等进行表征,表明18-冠-6/Fe₃O₄复合纳米粒子的粒径在12-23 nm,饱和磁化强度为56.338 emu/g,具有超顺磁性和较强的抗氧化性能。用制得的复合磁性纳米粒子对溶液中铀、钍等离子进行吸附实验,具有吸附量大、快速高效、易于磁液分离等优点,可方便进行富集和定位,利于回收和重复利用。更多还原

【Abstract】 Fe₃O₄ Magnetic nanoparticles（MNPs）have the advantages of large specific surface area,high adsorption capacity, and conveniently magnetic separation.Crown ether display good selectivity of coordination with uranyl ion,thorium ion and so on.To combine the feature and advantage,this study prepared for 18-Crown-ether-6/LA/Fe₃O₄ magnetic particles which with high adsorption and selectivity properties and easy to separate from wastewater with magnet. The structure was characterized with IR、SEM、VSM、DGA and so on.The results rereal that;18-Crown-ether-6/LA/ Fe₃O₄ magnetic particles was size of（12-23）nm,saturation magnetization was 56.338emu/g with superparamagnetism and strong antioxidant properties.A test for the adsorption of the magnetic particles with uranyl ion and thorium ion has been carried out.The results indicated that the magnetic particles had good adsorption capacity,quick efficient and conveniently magnetic separation.It can be used repeatly,with a good reproducibility.更多还原