氧化石墨烯基异丙隆分子印迹聚合物的制备及其吸附性能研究

Preparation and Absorption Property of Graphene Oxide-Based Isoproturon Molecularly Imprinted Polymer

摘要: 以氧化石墨烯为载体,异丙隆为模板分子,采用表面印迹技术制备了分子印迹聚合物.采用透射电子显微镜、拉曼光谱和热重分析仪对该分子印迹聚合物的结构进行了表征,并通过动态平衡结合法研究了该分子印迹聚合物的吸附能力.结果表明:准二级动力学模型很好地拟合了吸附动力学,相关系数(R2)为0.999 7;与非分子印迹聚合物相比,制备的印迹材料表现出高吸附效率和快速的吸附动力学;选择性吸附试验表明该分子印迹聚合物对异丙隆具有选择性和特异性吸附.

Abstract: The surface-molecularly imprinted polymer (MIP) was prepared using graphene oxide as carrier and isoproturon as template.Structure of the MIP was characterized by TEM,Raman and TGA analysis.Absorption property of the MIP was studied by dynamic balance combined method.The results showed that the adsorption kinetics could be well described by the pseudo second-order model with correlation coefficient (R2) of 0.999 7.Moreover,compared with non-molecularly imprinted polymer,the MIP showed higher removal rate and rapid adsorption kinetics.The result of selective adsorption showed that MIP displayed selective and specific adsorption to isoproturon.