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采用超声协助悬浮聚合法以Ni(Ⅱ)离子为模板制备了氨基功能化纳米Fe3O4–离子印迹聚(甲基丙烯酸甲酯(MMA)-3-(2-氨基乙基胺)-2-甲基丙烯酸羟丙酯(HPMA)-二乙烯基苯(DVB))磁性复合材料,Fe3O4@ion imprinted poly(MMA-HPMA-DVB),简称为Fe3O4@IIP(MMA-HPMA-DVB)。通过EA、XRD、FTIR、TEM、VSM等手段对Fe3O4@IIP(MMA-HPMA-DVB)进行了组成、结构、形貌、磁性等表征,并研究了其吸附水中Ni(Ⅱ)的性能。结果表明:合成的Fe3O4@IIP(MMA-HPMA-DVB)平均粒径为~100 nm,饱和磁化强度为43.8 emu/g;共聚单体甲基丙烯酸甲酯(MMA)的羰基通过氢键与Fe3O4表面羟基结合,有利于Fe3O4@IIP(MMA-HPMA-DVB)的壳核结构的形成与稳定;Fe3O4@IIP(MMA-HPMA-DVB)对Ni(Ⅱ)的吸附受溶液pH值影响较小;等温吸附线符合Langmuir模型,饱和吸附量(qm,c=500 mg/g,qm,e=478 mg/g),高于非离子印迹材料(Fe3O4@none-ion imprinted poly(MMAHPMA-DVB),简称为Fe3O4@NIP(MMA-HPMA-DVB)),qm,c=90.9 mg/g,qm,e=83.8 mg/g)。吸附过程可在5 min内达到平衡,符合准二级动力学模型。Fe3O4@IIP(MMA-HPMA-DVB)能高选择性地有效吸附水中Ni(Ⅱ),对Ni(Ⅱ)的印迹因子(α)为1.9,对几种常见共存离子的选择性因子(β)>7.7,是潜在的高选择性吸附和回收Ni(Ⅱ)的功能材料。
Amino-functionalized Fe3O4-ion imprinted poly (methyl methacrylate (MMA) -3- (2-aminoethylamine) -2-methyl HPMA-DVB) magnetic composites, Fe3O4 @ imprinted poly (MMA-HPMA-DVB), abbreviated as Fe3O4 @ IIP (MMA-HPMA-DVB). The composition, structure, morphology and magnetism of Fe3O4 @ IIP (MMA-HPMA-DVB) were characterized by means of EA, XRD, FTIR, TEM and VSM. The properties of Ni (Ⅱ) The results showed that the average particle diameter of Fe3O4 @ IIP (MMA-HPMA-DVB) was ~ 100 nm and the saturation magnetization was 43.8 emu / g. The carbonyl group of the comonomer methyl methacrylate (MMA) The adsorption of Ni (Ⅱ) by Fe3O4 @ IIP (MMA-HPMA-DVB) is less affected by the pH value of the solution, which is in favor of the formation and stabilization of the putamen structure of Fe3O4 @ IIP (MMA-HPMA-DVB) The adsorption isotherm was in accordance with the Langmuir model. The saturated adsorption capacity was higher than that of the MMAHPMA-DVB (qM = 500 mg / g, qm, e = 478 mg / g) Abbreviated as Fe3O4 @ NIP (MMA-HPMA-DVB)), qm, c = 90.9 mg / g, qm, e = 83.8 mg / g). Adsorption process can reach equilibrium within 5 min, in line with quasi-second-order kinetic model. The selective adsorption of Ni (Ⅱ) into water by Fe3O4 @ IIP (MMA-HPMA-DVB) was 1.9, and the selective factor (β) > 7.7, is a potential high selective adsorption and recovery of Ni (Ⅱ) functional materials.