CAS Key Laboratory of Chemistry of Northwestern Plant Resources and Key Laboratory for Natural Medicine of Gansu Province, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou, Gansu, 730000, People's Republic of China.
University of Chinese Academy of Sciences, Beijing, 100049, People's Republic of China.
Mikrochim Acta. 2020 Jan 2;187(1):88. doi: 10.1007/s00604-019-4013-5.
Magnetic hierarchical nickel/nickel oxide/carbon nanorods (Ni/NiO@C) were prepared via the pyrolysis of a metal-organic framework containing nickel(II) nickel (Ni-MOF; Ni(BTC)) under argon atmosphere. In this material, magnetic Ni/NiO@C nanoparticles are embedded in porous carbon nanorods, and the morphology is similar to that of the original Ni-MOF precursor. The synthesized nanorods were applied as magnetic sorbents in the solid-phase extraction of five benzoylurea insecticides (flufenoxuron, chlorbenzuron, teflubenzuron, diflubenzuron and triflumuron), and their performance was evaluated under optimized conditions. The results show that the material exhibits high extraction recoveries from spiked samples (82.9%-107.6%) and linear response in the range of 0.2-450 μg·L. It is also characterized by relatively low limits of detection (50-100 ng·mL) at a signal-to-noise ratio of 3. The sorbent is chemically stable and can be repeatedly recycled, with little decline in extraction capacity after 20 cycles of reuse. The method was successfully applied to the quantification of benzoylureas in tea, wolfberry, millet, and oat samples, and it showed high extraction efficiency. Graphical abstractSchematic representation of the synthesis of magnetic hierarchical nickel/nickel oxide/carbon nanorods derived from Ni-MOF. The material is employed as a sorbent for the magnetic solid-phase extraction of benzoylurea insecticides.
磁性分级镍/氧化镍/碳纳米棒（Ni/NiO@C）是通过在氩气气氛下热解含有镍（II）镍的金属有机骨架（Ni-MOF；Ni（BTC））制备的。在这种材料中，磁性 Ni/NiO@C 纳米颗粒嵌入在多孔碳纳米棒中，其形态与原始 Ni-MOF 前体相似。所合成的纳米棒被用作磁性固相萃取五种苯甲酰脲类杀虫剂（氟虫脲、氯苯脲、氟铃脲、除虫脲和噻虫隆）的吸附剂，并在优化条件下评估了它们的性能。结果表明，该材料对加标样品具有较高的萃取回收率（82.9%-107.6%）和线性响应范围（0.2-450μg·L）。其检测限（50-100ng·mL）也相对较低，信噪比为 3。该吸附剂化学稳定性好，可重复使用 20 次，萃取容量下降较小。该方法成功应用于茶叶、枸杞、小米和燕麦样品中苯甲酰脲类的定量分析，具有较高的萃取效率。
