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Sub-nanomolar sensing of ionic mercury with polymeric electrospun nanofibers

机译:聚合物电纺纳米纤维对纳汞的亚纳摩尔感测

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摘要

Ethyl cellulose (EC) based electrospun nanofibers were exploited for sub-nanomolar level optical chemical sensing of ionic mercury. An azomethine ionophore was used as Hg (Ⅰ) and Hg (Ⅱ) sensing material. Ethyl cellulose nanofibers with varying amounts of the ionic liquid; 1-ethyl-3-methylimidazolium tetrafluoroborate (EMIMBF_4) were prepared and characterized. The nanofibers were fabricated by elec-trospinning technique. The offered chemosensor allow determination of mercury ions in a large linear working range between 1.0 × 10~(-10) and 1.0 × 10~(-4)mol L~(-1). Limit of detection was found to be 0.07 nM which makes this technique alternative to cold-vapor atomic absorption spectrometry (CV-AAS), flame emission methods and to inductively coupled plasma-mass spectrometry (ICP-MS). The electrospun nanofibers exhibited excellent sensitivity for Hg (Ⅱ) with respect to the continuous thin films prepared with same composition. The observed high sensitivity can be attributed to the high surface area of the nanofibrous materials and enhanced diffusibility of the mercury ions to the ionophore.
机译:基于乙基纤维素(EC)的电纺纳米纤维被用于亚纳米级的离子汞光学化学传感。以甲亚胺离子载体作为汞(Ⅰ)和汞(Ⅱ)的传感材料。具有不同量离子液体的乙基纤维素纳米纤维;制备并表征了四氟硼酸1-乙基-3-甲基咪唑鎓(EMIMBF_4)。纳米纤维是通过电纺丝技术制备的。所提供的化学传感器可在1.0×10〜(-10)至1.0×10〜(-4)mol L〜(-1)的较大线性工作范围内测定汞离子。发现的检测极限为0.07 nM,这使该技术可替代冷蒸气原子吸收光谱法(CV-AAS),火焰发射法和电感耦合等离子体质谱法(ICP-MS)。对于相同组成的连续薄膜,电纺纳米纤维对汞(Ⅱ)具有极好的敏感性。观察到的高灵敏度可归因于纳米纤维材料的高表面积和汞离子对离子载体的扩散性增强。

著录项

  • 来源
    《Materials Chemistry and Physics》 |2012年第1期|547-552|共6页
  • 作者单位

    University of Dokuz Eylul, The Graduate School of Natural and Applied Sciences, Department of Chemistry, 35160 Izmir, Turkey;

    University of Dokuz Eylul, Faculty of Sciences, Department of Chemistry, 35760 Izmir, Turkey,University of Dokuz Eylul, Center for Fabrication and Application of Electronic Materials (EMUM), 35160 Izmir, Turkey;

    University of Dokuz Eylul, The Graduate School of Natural and Applied Sciences, Department of Chemistry, 35160 Izmir, Turkey,University of Dokuz Eylul, Faculty Engineering, Department of Metallurgical and Materials Engineering, 35160 Izmir, Turkey;

    University of Dokuz Eylul, Faculty of Sciences, Department of Chemistry, 35760 Izmir, Turkey;

    University of Dokuz Eylul, Center for Fabrication and Application of Electronic Materials (EMUM), 35160 Izmir, Turkey,University of Dokuz Eylul, Faculty Engineering, Department of Metallurgical and Materials Engineering, 35160 Izmir, Turkey;

    University of Dokuz Eylul, Faculty Engineering, Department of Metallurgical and Materials Engineering, 35160 Izmir, Turkey;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    nanostructures; optical materials; thin films; luminescence;

    机译:纳米结构光学材料薄膜;发光的;
  • 入库时间 2022-08-18 00:39:37

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