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Robust fabrication of nanomaterial-based all-solid-state ion-selective electrodes

机译：纳米材料全固态离子选择电极的鲁棒制造

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摘要

Currently, nanomaterial-based all-solid-state ion-selective electrodes (ASS-ISEs) have become attractive tools for ion sensing in environmental and biological applications. However, nanomaterial solid contact can easily fall off the electrode surface owing to poor adhesion. This poses serious limits to the wide use of these sensors. Herein, we report a general and facile method for the robust fabrication of nanomaterial-based ASS-ISEs. It is based on the silver-based conductive adhesive (CA) with excellent electronic conductivity and strong adhesion ability as the binder to construct nanomaterial-based solid contact. The solid-contact Ca2+-ISE based on single-walled carbon nanotubes (SWCNTs) is chosen as a model. The proposed electrode based on CA-SWCNTs shows a linear response in the concentration range of 10 6 to 10 3 M with a slope of 25.96 0.36 mV per decade and a detection limit of 1.7 10 7 M. In addition, the CA-SWCNT-based Ca2+-ISE exhibits an improved potential stability and reduced water film compared to the coated-wire ISE. Above all, experiments also show that the CA-SWCNTbased electrode exhibits nearly the same electrochemical characteristics as the classical only SWCNTbased electrode in term of resistance, capacitance and potential stability. We believe that CAnanomaterial- based solid contacts provide an appealing substitute for traditional solid contacts based on nanomaterials.
机译：目前，纳米材料的全固态离子选择性电极（ASS ises）已成为环境和生物应用中的离子感测的吸引力。然而，由于粘附性差，纳米材料固体接触可以容易地脱落电极表面。这对这些传感器的广泛使用构成了严重限制。在此，我们报告了一种用于纳米材料灰ises的鲁棒制造的一般和容易的方法。它基于银基导电粘合剂（CA），具有优异的电子导电性和强的粘合能力作为粘合剂，以构建纳米材料的固体接触。选择基于单壁碳纳米管（SWCNT）的固接+ Ca 2 +作为模型。基于CA-SWCNT的所提出的电极显示出10 6至10 3米的浓度范围内的线性响应，斜率为25.96 0.36mV，每十年的检出限为1.7 10 7米。此外，CA-SWCNT-与涂层线ISE相比，基于CA2 +的CA2 + ISIS提高了潜在的稳定性和降低的水膜。最重要的是，实验还表明，在电阻，电容和电位稳定性期间，CA-SWCT基于电极具有几乎与经典的SWCNT基电极相同的电化学特性。我们认为，基于法的固体触点提供了基于纳米材料的传统固体触点的吸引力。

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  • 来源
    《RSC Advances》 |2019年第29期|共5页
  • 作者

    Liu Kaikai; Jiang Xiaojing; Song Yuehai; Liang Rongning;

  • 作者单位

    Yantai Univ Sch Environm &

    Mat Engn Yantai 264005 Shandong Peoples R China;

    Chinese Acad Sci CAS Key Lab Coastal Environm Proc &

    Ecol Remediat Yantai Inst Coastal Zone Res Yantai 264003 Shandong Peoples R China;

    Yantai Univ Sch Environm &

    Mat Engn Yantai 264005 Shandong Peoples R China;

    Chinese Acad Sci CAS Key Lab Coastal Environm Proc &

    Ecol Remediat Yantai Inst Coastal Zone Res Yantai 264003 Shandong Peoples R China;

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  • 正文语种 eng
  • 中图分类 化学;
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