磁性分子印迹材料的制备及其对Cu(Ⅱ)的吸附性能研究

Method to Produce Magnetic Molecularly Imprinting Nanoparticles and the Study of Adsorption of Cu(Ⅱ)

通过水热法合成铜离子磁性印记分子聚合物(Fe_3O_4@SiO_2-M IP),并借助SEM、XRD、FT-IR等对合成样品的形貌粒径和结构进行表征。Fe_3O_4@SiO_2-M IP的比表面积为35.944m2/g,改性后的比表面积明显大于纳米Fe_3O_4,比表面积的增大有利于提高磁性粒子作为吸附剂时的吸附容量。研究p H值、印记材料的投加量、Cu(Ⅱ)溶液的初始浓度和振荡时间对吸附的影响。结果表明,在p H为7、T=298K的最优条件下,Fe_3O_4@SiO_2-M IP铜离子磁性印记分子对Cu(Ⅱ)的吸附率可达97%以上,饱和吸附量为23.31mg/g。

The copper ion imprinted polymer magnetic molecules（ Fe_3O_4@ SiO_2-MIP） were synthesized via an environmentally friendly hydrothermal route and were characterized by SEM,XRD,FTIR and BET specific area,which showed that the Fe_3O_4@ SiO_2-MIP has a high specific surface area of about 35. 944m2/ g,and the modified surface area is significantly larger than the nano Fe_3O_4,which is beneficial to improve the capacity of magnetic nanoparticles as adsorption. Various factors affecting the uptake behavior,such as p H,amount of Fe_3O_4@ SiO_2-MIP,initial concentration of Cu2 ＋and the time of shocking were investigated.The adsorption data showed that absorption can be up to 97% at p H of 7 with a maximum adsorption capacity of 23. 31 mg / g for Cu2 ＋.