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首页> 外文期刊>Sensors and Actuators >Oxygen vacancy enhanced Co_3O_4/ZnO nanocomposite with small sized and loose structure for sensitive electroanalysis of Hg(Ⅱ) in subsidence area water
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Oxygen vacancy enhanced Co_3O_4/ZnO nanocomposite with small sized and loose structure for sensitive electroanalysis of Hg(Ⅱ) in subsidence area water

机译：氧空位增强CO_3O_4 / ZnO纳米复合材料，具有小尺寸和松散结构，用于沉降区水中HG（Ⅱ）的敏感电催化

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摘要

Metal-oxide based nanocomposites have superior benefits to fabricate sensing interface for electroanalysis of heavy metal ions (HMIs) due to the introduction of various advantages (i.e. environmentally friendly, low-cost and high activity) into one material. Herein, Co_3O_4/ZnO nanocomposite with small size (sub-40nm) and abundant oxygen vacancy was successfully prepared through one-step hydrothermal synthesis and subsequent annealing treatment, as well as the engineering of Co-Zn molar ratio. Moreover, the loose structure of Co_3O_4/ZnO nanocomposite can effectively improve the exposure of active sites on surface and enhance mass transfer. As a result, the as-obtained Co_3O_4/ZnO sensor has an impressive performance with sensitivity of 504.74 μA μM~(-1) cm_(-2) for electroanalysis of Hg(Ⅱ) by square wave anodic stripping voltammetry (SWASV). Otherwise, diverse detection performances of the product with different Co:Zn molar ratio are investigated, proving the superiority for constructing C_3O_4/ZnO sensor with molar ratio of 2Co/Zn. In addition, the electroanalytical behavior of the proposed sensors toward Hg(Ⅱ) in subsidence area water was also realized with considerable result. By designing multifunctional nanocomposite with bimetal oxide nanomaterials, this work will provide a novel strategy to gain nanocomposite with controlling morphology and enriching oxygen vacancies, which are expected to be excellent candidate electrode materials for electroanalysis.
机译：基于金属氧化物的纳米复合材料具有优异的益处，以制造重金属离子（HMIS）的传感界面，因为引入了各种优点（即环保，低成本和高活性）到一种材料。这里，通过一步水热合成和随后的退火处理成功制备具有小尺寸（亚40nm）和丰富氧空位的CO_3O_4 / ZnO纳米复合材料，以及CO-Zn摩尔比的工程。此外，CO_3O_4 / ZnO纳米复合材料的松散结构可以有效地改善表面活性位点的暴露并增强质量传递。结果，通过方波anodic汽提伏安法（SWASV）具有504.74μAμm〜（-1）〜（-2）的504.74μAμm〜（-2）的灵敏度，具有令人印象深刻的性能。否则，研究了具有不同CO：Zn摩尔比的产品的不同检测性能，证明了具有2CO / Zn的摩尔比构建C_3O_4 / ZnO传感器的优越性。此外，还以相当大的结果实现了临时区域水中所提出的传感器对HG（Ⅱ）的电解行为。通过用双金属氧化物纳米材料设计多功能纳米复合材料，该作品将提供一种新的策略，以利用控制形态和富含氧空位的纳米复合材料，这预计将是用于电铝的优异候选电极材料。

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  • 来源
    《Sensors and Actuators》 |2021年第1期|128967.1-128967.12|共12页
  • 作者

    Xing-Liang Cheng; Qian-Qian Xu; Shan-Shan Li; Jia Li; Yang Zhou; Yongxing Zhang; Suwen Li;

  • 作者单位

    Anhui Province Key Laboratory of Pollutant Sensitive Materials and Environmental Remediation Department of materials science and engineering Huaibei Normal University Huaibei 235000 PR China;

    Anhui Province Key Laboratory of Pollutant Sensitive Materials and Environmental Remediation Department of materials science and engineering Huaibei Normal University Huaibei 235000 PR China;

    Anhui Province Key Laboratory of Pollutant Sensitive Materials and Environmental Remediation Department of materials science and engineering Huaibei Normal University Huaibei 235000 PR China;

    Anhui Province Key Laboratory of Pollutant Sensitive Materials and Environmental Remediation Department of materials science and engineering Huaibei Normal University Huaibei 235000 PR China;

    Anhui Province Key Laboratory of Pollutant Sensitive Materials and Environmental Remediation Department of materials science and engineering Huaibei Normal University Huaibei 235000 PR China;

    Anhui Province Key Laboratory of Pollutant Sensitive Materials and Environmental Remediation Department of materials science and engineering Huaibei Normal University Huaibei 235000 PR China;

    Anhui Province Key Laboratory of Pollutant Sensitive Materials and Environmental Remediation Department of materials science and engineering Huaibei Normal University Huaibei 235000 PR China;

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  • 关键词

    Co_3O_4/ZnO nanocomposite; Oxygen vacancy; Adsorption; Electroanalysis; Hg(Ⅱ);

    机译：CO_3O_4 / ZnO纳米复合材料;氧气空位;吸附;电分析;HG（Ⅱ）;

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