氧化石墨烯表面新型磁性四溴双酚A印迹复合材料的制备及吸附性能

以二氧化硅包覆的磁性氧化石墨烯为载体,利用热聚合方法制备了对四溴双酚A(TBBPA)有特异吸附效果的新型磁性印迹复合材料.采用透射电子显微镜(TEM)、扫描电子显微镜(SEM)、傅里叶变换红外光谱(FTIR)、热重分析(TGA)和样品振动磁强计(VSM)对该印迹复合材料进行了表征.结果表明,在氧化石墨烯表面制备了一层厚度为55～65 nm、热稳定良好的磁性印迹层.结合磁固相萃取技术(M-SPE)和高效液相色谱(HPLC)检测技术研究了该磁性印迹复合材料对四溴双酚A的吸附行为,结果表明该印迹复合材料对四溴双酚A具有良好的选择吸附能力,最大吸附量为16.33 mg/g.结合HPLC检测技术,该印迹复合材料可用于分离富集饮用水中的四溴双酚A.

Preparation and Adsorption Properties of Novel Magnetic Tetrabromobisphenol A Molecularly Imprinted Composite Material Based on Graphene Oxide Surface

A novel magnetic molecularly imprinted polymer(Fe3O4@GO@MIP) based on magnetic graphene coated with silicon dioxide layer was synthesized using heated polymerization technique. The MIP was characterized by transmission electron microscopy(TEM), scanning electron microscopy(SEM), Fourier transform infrared spectroscopy(FTIR), thermogravimetric analysis(TGA) and vibrating sample magnetometer(VSM). The results showed that a thermal stability magnetic imprinted layer with the thickness of 55-65 nm was coated steadily on the graphene oxide surface. Adsorption performance of the Fe3O4@GO@MIP was investigated combined with magnetic solid phase extraction(M-SPE) and high-performance liquid chromatography(HPLC) technology, and the results indicated the Fe3O4@GO@MIP possessed higher selectivity towards tetrabromobisphenol A with the maximum adsorption capacity of 16.33 mg/g. The magnetic molecularly imprinted composite material was applied to separation and enrichment of tetrabromobisphenol A in environmental water samples combined with HPLC technology.