首页> 外文期刊>Sensors and Actuators >Electrochemical sensor construction based on Nafion/calcium lignosulphonate functionalized porous graphene nanocomposite and its application for simultaneous detection of trace Pb~(2+) and Cd~(2+)
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Electrochemical sensor construction based on Nafion/calcium lignosulphonate functionalized porous graphene nanocomposite and its application for simultaneous detection of trace Pb~(2+) and Cd~(2+)

机译:Nafion /木质素磺酸钙功能化多孔石墨烯纳米复合材料的电化学传感器构建及其在同时检测痕量Pb〜(2+)和Cd〜(2+)中的应用

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摘要

Graphical abstractDisplay OmittedHighlightsCalcium lignosulfonate (CLS) was firstly introduced for preparing graphene.Porous structure of CLS/graphene was obtained.The nanocomposite was used to construct sensor for the detection of Pb2+and Cd2+.The proposed sensor was sensitive and selective.AbstractHere, a new porous graphene (PGR) based nanocomposite was synthesized by a chemical and thermal reduction of graphite oxide in the assistance of calcium lignosulfonate (CLS), and characterized by scanning electron microscopy SEM, TEM, XPS, Zeta potential analysis, FTIR and EIS. Then the as-prepared CLS/PGR was used along with Nafion to modify a glassy carbon electrode (GCE) for constructing electrochemical sensor to detect Pb2+and Cd2+simultaneously. Compared with the bare GCE, the reduced graphene oxide/GCE, and the CLS/PGR/GCE, the Nafion/CLS/PGR/GCE exhibited improved electrochemical performance in detecting the two ions. It could be ascribed to the synergistic contribution from PGR, CLS and Nafion, which integrated the advantageous features of high active surface area, good cation exchange ability and strong adsorption capacity. Under optimum conditions, this novel sensor showed a wide detection range for Pb2+and Cd2+(0.05–5.0 μM) with the limit of detection and limit of quantification for Pb2+0.01 and 0.03 μM, for Cd2+0.003 and 0.01 μM, respectively. It was successfully applied for the simultaneous determination of Pb2+and Cd2+in real water samples with satisfying recoveries of 93.6–105.3% for Pb2+and 93.5–102.5% for Cd2+, demonstrating its feasibility for the determination of environmental metallic pollutants.
机译: 图形摘要 < ce:simple-para>省略显示 突出显示 木质素磺酸钙(CLS 获得了CLS /石墨烯的多孔结构。 该纳米复合材料用于构建用于检测Pb的传感器 2 + 和Cd 2 + 建议的传感器具有敏感性和选择性。 摘要 2 + 和Cd < ce:sup loc =“ post”> 2 + 同时进行。与裸露的GCE,还原的氧化石墨烯/ GCE和CLS / PGR / GCE相比,Nafion / CLS / PGR / GCE在检测两种离子方面表现出更高的电化学性能。归因于PGR,CLS和Nafion的协同作用,它们综合了高活性表面积,良好的阳离子交换能力和强吸附能力等优点。在最佳条件下,这种新颖的传感器对Pb 2 + 和Cd 2 + (0.05–5.0μM),对于Pb 2 + 0.01和0.03μM,对于Cd 2 + 0.003和0.01µμM。它已成功地用于同时测定Pb 2 + 和Cd 2 + 水样,Pb 2 + 的回收率为93.6–105.3%,Cd 2+ <9>的回收率为93.5–102.5% / ce:sup>,证明了其测定环境金属污染物的可行性。

著录项

  • 来源
    《Sensors and Actuators》 |2018年第4期|540-551|共12页
  • 作者单位

    College of Textiles and Clothing, Yancheng Institute of Technology,College of Chemistry and Engineering, Yangzhou University,Jiangsu Collaborative Innovation Center for Ecological Building Materials and Environmental Protection EquipmentsJiangsu Collaborative Innovation Center for Ecological Building Materials and Environmental Protection Equipments, Yancheng Institute of Technology;

    College of Textiles and Clothing, Yancheng Institute of Technology;

    College of Textiles and Clothing, Yancheng Institute of Technology;

    College of Textiles and Clothing, Yancheng Institute of Technology;

    College of Chemistry and Engineering, Yangzhou University;

    College of Chemistry and Engineering, Yangzhou University;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Porous graphene; Calcium lignosulphonate; Nafion; Lead; Cadmium; Electrochemical sensor;

    机译:多孔石墨烯;木质素磺酸钙;Nafion;铅;镉;电化学传感器;

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