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首页> 外文期刊>Journal of Materials Chemistry, A. Materials for energy and sustainability >An effective method for the synthesis of yolk-shell magnetic mesoporous carbon-surface molecularly imprinted microspheres
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An effective method for the synthesis of yolk-shell magnetic mesoporous carbon-surface molecularly imprinted microspheres

机译：合成蛋黄壳磁介孔碳表面分子印迹微球的有效方法

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摘要

This study aims to immobilise molecularly imprinted polymers (MIPs) on the surface of yolk-shell magnetic mesoporous carbon (Fe3O4@void@C) spheres for phthalate ester (PAE) recognition through an effective route. To link MIPs to Fe3O4@void@C spheres, carboxyl-modified yolk-shell magnetic mesoporous carbon (Fe3O4@void@C-COOH) was synthesised by first oxidising Fe3O4@void@C with H2O2, and MIPs were subsequently grafted on the surface of Fe3O4@void@C-COOH by a surface polymerisation method with diisononyl phthalate (DINP), methacrylic acid (MAA) and ethylene glycol dimethacrylate (EGDMA) as template molecule, functional monomer and cross-linker, respectively. The structure and morphology of the synthesised materials were characterised by XRD, TEM, SEM, FT-IR, N-2 sorption and magnetic susceptibility measurements. The synthesis conditions for the formation of Fe3O4@void@C-COOH were systematically investigated. It was observed that the chemical modification of Fe3O4@void@C is highly influenced by the type of oxidant, the concentration of H2O2, oxidation temperature and time. The adsorption isotherm and kinetics of Fe3O4@void@C-MIPs showed that Fe3O4@void@C-MIPs possessed good recognition, fast adsorption rates (approximately 20 min to reach equilibrium) and high adsorption capacities (569.2 mg g(-1)) toward PAEs, which were ascribed to their uniformity and monodispersity. In addition, Fe3O4@void@C-MIPs exhibited excellent reusability for the adsorption of PAEs over six adsorption-desorption cycles.
机译：这项研究的目的是通过有效途径将分子印迹聚合物（MIP）固定在蛋壳磁介孔碳（Fe3O4 @ void @ C）球表面上，以识别邻苯二甲酸酯（PAE）。为了将MIP连接到Fe3O4 @ void @ C球上，首先通过用H2O2氧化Fe3O4 @ void @ C来合成羧基改性的蛋黄壳磁介孔碳（Fe3O4 @ void @ C-COOH），然后将MIP接枝到表面通过邻苯二甲酸二异壬酯（DINP），甲基丙烯酸（MAA）和乙二醇二甲基丙烯酸酯（EGDMA）作为模板分子，功能单体和交联剂的表面聚合法制备Fe3O4 @ void @ C-COOH。通过XRD，TEM，SEM，FT-IR，N-2吸附和磁化率测量对合成材料的结构和形貌进行表征。系统地研究了形成Fe3O4 @ void @ C-COOH的合成条件。观察到，Fe3O4 @ void @ C的化学改性在很大程度上受氧化剂类型，H2O2浓度，氧化温度和时间的影响。 Fe3O4 @ void @ C-MIPs的吸附等温线和动力学表明，Fe3O4 @ void @ C-MIPs具有良好的识别性，快速的吸附速率（约20分钟达到平衡）和高吸附容量（569.2 mg g（-1））。归因于PAE的均匀性和单分散性。另外，Fe3O4 @ void @ C-MIPs在六个吸附-解吸循环中对PAE的吸附均具有出色的可重复使用性。

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