8-羟基喹啉锗印迹聚合物合成及选择性吸附锗研究

Study on Synthesis of 8-Hydroxyquinoline-Germanium Imprinted Polymer and Its Selective Adsorption of Germanium

以8-羟基喹啉和四氯化锗为模板,采用杂化沉淀聚合法制备了8-羟基喹啉锗印迹聚合物微球MIPs,并对其微观结构及孔径分布进行表征,推测了8-羟基喹啉锗印迹聚合物合成过程,对MIPs对锗离子的吸附性能进行了研究。结果表明,MIPs具有大比表面积(170.32m^2/g)、微观多孔的纳米微球结构。吸附时间延长、溶液中初始锗含量提高,MIPs对锗离子的选择性吸附能力提高,当吸附时间2h、溶液中初始锗浓度为0.5mg/mL时,MIPs对锗的吸附率达到最大96.84%,MIPs对锗离子具有显著吸附选择特性。

Microspheric 8-hydroxyquinoline-germanium ion imprinted polymer （MIPs） was prepared by hybrid precipitation polymerization method with 8-hydroxyquinoline and germanium tetrachloride as template. Microstructure and pore size distribution of MIPs were characterized. Synthesis process of imprinted polymer was speculated. Adsorption performance of MlPs was analyzed. The results show that MlPs has large specific surface area （170.32 m2/g）, and micro porous nanometer microspheres structure. Selective adsorption ability of MIPs for germanium ion is improved with increase of adsorption time and initial germanium content in solution. Adsorption rate of germanium with MIPs is 96. 84% under the conditions of adsorption time of 2 h and initial concentration of germanium of 0. 5 mg/mL. MIPs has remarkable selective adsorption ability for germanium ion.