Chemistry and Process Department, Niroo Research Institute, Tehran, Iran.
Department of Analytical Chemistry and Pollutants, Faculty of Chemistry and Petroleum Sciences,, Shahid Beheshti University, Tehran, Iran.
J Chromatogr A. 2020 Dec 20;1634:461664. doi: 10.1016/j.chroma.2020.461664. Epub 2020 Nov 2.
This study describes the synthesis of a novel polymer (polypyrrole-polythiophene) coated magnetic porous carbon (MPC) composite derived from magnetic metal-organic framework (MOF) and its utilization in multi-target environmental pollutants preconcentration. In this regards, FeO nanoparticles (NPs) was used as magnetic core and Co-MOF-71 was coated on the surface of the NPs. Afterwards, magnetic MOF (MMOF) was carbonized under nitrogen atmosphere and finally MNC was coated with a polymer layer of the type polypyrrole-polythiophene to obtain the nanocomposite (MPC@PPy-PTh). Magnetic property, structure and morphology of MPC@PPy-PTh were explored via various characterization techniques. Applicability of MPC@PPy-PTh nanoadsorbent was investigated in multi-target environmental pollutants preconcentration using 4-chlorophenol 2-naphtol, 1-amino-2-naphthol, 2,4-dichloroaniline, 3,4-dichloroaniline, benzothiophene and naphthalene as the model analytes. Effect of experimental factors on the preconcentration of target pollutants was explored and optimized systematically. Under the optimized condition, LODs were obtained in the range of 0.06-0.18 µg L. The proposed method exhibited linearity within the range of 0.25-500 µg L. Repeatability of the new method based on the relative standard deviations (n = 5) was in the range of 3.4-9.0%. Finally, the analytical applicability of the optimized method was investigated in seawater and wastewater samples and satisfactory results were achieved.
本研究描述了一种新型聚合物（聚吡咯-聚噻吩）涂覆的磁性多孔碳（MPC）复合材料的合成，该复合材料由磁性金属有机骨架（MOF）衍生而来，并将其用于多目标环境污染物的预浓缩。在这方面，使用 FeO 纳米粒子（NPs）作为磁性核，在 NPs 表面涂覆 Co-MOF-71。随后，在氮气气氛下碳化磁性 MOF（MMOF），最后用聚吡咯-聚噻吩类型的聚合物层涂覆 MNC，得到纳米复合材料（MPC@PPy-PTh）。通过各种表征技术研究了 MPC@PPy-PTh 的磁性、结构和形貌。使用 4-氯苯酚、2-萘酚、1-氨基-2-萘酚、2,4-二氯苯胺、3,4-二氯苯胺、苯并噻吩和萘作为模型分析物，研究了 MPC@PPy-PTh 纳米吸附剂在多目标环境污染物预浓缩中的适用性。系统地探讨和优化了实验因素对目标污染物预浓缩的影响。在优化条件下，LOD 在 0.06-0.18 µg L 的范围内。该方法在 0.25-500 µg L 的范围内呈现线性。新方法的重复性基于相对标准偏差（n=5）在 3.4-9.0%的范围内。最后，在海水和废水样品中考察了优化方法的分析适用性，得到了令人满意的结果。
