摘要
以正硅酸乙酯包覆、硅烷偶联剂MPS改性的Ni0.5Zn0.5Fe2O4@SiO2@MPS纳米粒子为磁核,以雌二醇(E2)为模板分子、丙烯酰胺为功能单体、乙二醇二甲基丙烯酸酯为交联剂、偶氮二异丁腈为引发剂,合成雌二醇核壳微球型磁性分子印迹聚合物(E2-MMIPs),采用红外光谱(FT-IR)、扫描电镜(SEM)以及振动样品磁强计(VSM)对E2-MMIPs样品的表面形貌、微结构、磁性质等进行表征,并将E2-MMIPs应用于实际环境水样中,探讨其对实际水样中E2的选择性识别和特异性吸附性能。结果表明:E2-MMIPs的形貌规则、分布均匀、热稳定性好,可以达到回收利用的磁性要求;E2-MMIPs对环境水样中E2具有较高的选择性吸附性能,其对E2的吸附量大于非磁性分子印迹聚合物的吸附量,最高吸附量可达到23.83 mg/g,并可应用于实际废水中有效识别E2。
This paper takes Ni0.5Zn0.5Fe2O4@SiO2@MPS nanoparticles coated with tetraethoxysilane and modified by silane coupling agent MPS as magnetic core,estradiol as template molecule,methacrylic acid as functional monomer,ethylene glycol dimethacrylateis as a crosslinking agent and azodiisobutyronitrileis as an initiator,synthesizes estradiol core-shell microsphere magnetic molecularly imprinted polymer(hereinafter referred to as polymer).The paper applies infrared spectroscopy,scanning electron microscopy and vibrating sample magnetometer to characterizing surface morphology,microstructure and magnetic properties of the polymer.The paper applies the polymer to the actual water samples to explore the selective recognition and specific adsorption of estradiol in the actual environmental water samples. The results show that the polymer has regular morphology,uniform distribution and good thermal stability,which can meet the magnetic requirements for recycling.The imprinted polymer has a higher selective adsorption capacity for estradiol,and the adsorption capacity is higher than that of the non-imprinted polymer,with the highest adsorption capacity up to 23.83 mg/g.Moreover,it can be applied in actual wastewater to effectively identifying estradiol.
作者
常梦珠
沈翔
洪建和
何岗
CHANG Mengzhu;SHEN Xiang;HONG Jianhe;HE Gang(Faculty of Materials and Chemistry,China University of Geosciences(Wuhan),Wuhan 430074,China)
出处
《安全与环境工程》
CAS
北大核心
2020年第1期96-103,共8页
Safety and Environmental Engineering
基金
国家重点研发计划政府间专项项目(2016YFE0119600)。
