磁性 Cu-MOFs 嵌入氧化石墨烯纳米复合材料中，用于增强含苯类杀虫剂的预浓缩。
Magnetic Cu-MOFs embedded within graphene oxide nanocomposites for enhanced preconcentration of benzenoid-containing insecticides.
机构信息
College of Chemistry and Chemical Engineering, Northwest Normal University, Lanzhou 730070, China; Key Laboratory of Bioelectrochemistry & Environmental Analysis of Gansu Province, Lanzhou 730070, China.
College of Chemistry and Chemical Engineering, Northwest Normal University, Lanzhou 730070, China.
出版信息
Talanta. 2018 May 1;181:112-117. doi: 10.1016/j.talanta.2018.01.004. Epub 2018 Jan 4.
Hybrid magnetic nanocomposites based on Cu-MOFs, graphene oxide (GO), and FeO nanoparticles (NPs) were prepared via chemical bonding approach, which GO were used as platforms to load nanostructured Cu-MOFs and FeO NPs. The composite features both magnetic separation characteristics and high MOFs porosity, making it an excellent adsorbent for magnetic solid-phase extraction (MSPE). The as-synthesized nanocomposites are characterized by XRD, TGA, SEM, TEM, nitrogen adsorption-desorption analysis and FT-IR spectroscopy. The composites are used in MSPE of six aromatic insecticides from various real samples prior to their quantification by HPLC. Amount of adsorbent, extraction times, extraction temperature, desorption times and oscillation rate are optimized. Under the optimal conditions, the method has a relative standard deviations (RSDs) of 1.9-2.7%, and good linearity (correlation coefficients higher than 0.9931). The low LOD and LOQ for six insecticides are found to be 0.30-1.58μgL and 1.0-5.2μgL, respectively. The RSDs of within batch extraction are 1.6-9.5% and 3.9-12% for batch to batch extraction. The experimental results suggest that the nanocomposites have potential application for removal of hazardous pollutants from effluents.
基于铜金属有机骨架（MOFs）、氧化石墨烯（GO）和 FeO 纳米粒子（NPs）的杂化磁性纳米复合材料通过化学键合方法制备，其中 GO 用作负载纳米结构 Cu-MOFs 和 FeO NPs 的平台。该复合材料具有磁性分离特性和高 MOFs 孔隙率，是一种用于磁性固相萃取（MSPE）的优异吸附剂。通过 XRD、TGA、SEM、TEM、氮气吸附-解吸分析和 FT-IR 光谱对合成的纳米复合材料进行了表征。将合成的纳米复合材料用于从各种实际样品中萃取六种芳香族杀虫剂，然后通过 HPLC 对其进行定量分析。优化了吸附剂用量、萃取次数、萃取温度、解吸时间和振荡速率。在最佳条件下，该方法的相对标准偏差（RSDs）为 1.9-2.7%，具有良好的线性（相关系数高于 0.9931）。六种杀虫剂的低检出限和定量限分别为 0.30-1.58μg/L 和 1.0-5.2μg/L。批内萃取的 RSDs 为 1.6-9.5%，批间萃取的 RSDs 为 3.9-12%。实验结果表明，该纳米复合材料有望用于从废水中去除危险污染物。
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