The feed ratio of hybrid nanocomposite.

In this work, a selective membrane for antibiotics removal from water was fabricated. The ingredients utilized for membrane fabrication include functionalized TiO2 nanoparticles (NPs), poly methyl methacrylate (PMMA) and poly vinyl imidazole (PVIM). Firstly, TiO2 nanostructure’s surface was functionalized through APTES. The layer of functional monomers methyl methacrylate (MMA) and VIM (vinyl imidazole) was grafted onto TiO2 surface through controlled radical polymerization technique. The grafted material was fabricated into membrane with embedded selectivity utilizing molecular imprinting method. The material was diagnostically analyzed with Fourier Transform Infrared-Attenuated total reflection (FTIR-ATR) spectroscopy and NMR (Nuclear Magnetic Resonance) technique, which confirm functionalization of nanomaterial surface. The grafted layer around the nanoparticles was visualized with FESEM. The hybrid membrane shows excellent and promising results against removal of antibiotics from aqueous medium. The fabricated membranes via Molecular imprinted polymer (MIP) technique were applied for the selective removal of antibiotics (ciprofloxacin) from real water samples. The removal efficiency and selectivity of the hybrid membrane was monitored via UV visible spectroscopy.本研究制备了一种用于去除水中抗生素的选择性膜。制备该膜所用原料包括功能化二氧化钛纳米颗粒（TiO₂ NPs）、聚甲基丙烯酸甲酯（poly methyl methacrylate，PMMA）与聚乙烯基咪唑（poly vinyl imidazole，PVIM）。首先，通过APTES对二氧化钛纳米结构的表面进行功能化修饰。随后，采用可控自由基聚合法，将功能单体甲基丙烯酸甲酯（methyl methacrylate，MMA）与乙烯基咪唑（vinyl imidazole，VIM）接枝至二氧化钛表面。将该接枝材料通过分子印迹法制备为具备嵌入式选择性的分离膜。采用傅里叶变换红外-衰减全反射（FTIR-ATR）光谱与核磁共振（NMR，Nuclear Magnetic Resonance）技术对该材料进行表征分析，证实了纳米材料表面的功能化修饰。通过场发射扫描电子显微镜（FESEM）对纳米颗粒表面的接枝层进行可视化观测。该杂化膜在水介质中对抗生素的去除表现出优异且极具应用前景的效果。通过分子印迹聚合物（MIP，Molecular Imprinted Polymer）技术制备的膜被应用于真实水样中环丙沙星（ciprofloxacin）的选择性去除。采用紫外-可见分光光度法（UV visible spectroscopy）监测该杂化膜的去除效率与选择性。