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Room-temperature NO_2 sensing properties and mechanism of CuO nanorods with Au functionalization

机译：室温NO_2 CUO纳米棒与Au官能化CuO纳米码的感应性能及机理

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摘要

In this work, a room-temperature NO_2 gas sensor based on Au-functionalized CuO nanorods (Au-CNRs) via a facile one-pot hydrothermal route was fabricated. The material characterizations were studied by XRD, SEM, TEM, XPS, and FTIR, respectively. The diameter and length of the pristine CuO nanorods (CNRs) were 30-60 run and 150-200 nm, respectively. The CNRs structure was not significantly affected by Au functionalization. Au nanoparticles with the diameters of less than 20 nm were uniformly distributed on the surface of 2 mol% Au-CNRs. The gas sensing test result showed that room-temperature NO_2 sensing can be achieved by Au-functionalized CuO nanorods, especially the 2mol% Au-CNRs, which exhibited the response of 3 towards 20 ppm NO_2 with the response and recovery times of 8 s and 176 s at room temperature (25 °C). This sample also showed good selectivity and reproducibility to NO_2. The related sensing mechanism of the CNRs based materials to NO_2 was investigated by the changing of energy band gap and activation energy with Au functionalization, respectively.
机译：在这项工作中，制备了一种室温NO_2气体传感器，基于Au官能化CuO纳米棒（Au-CNRS）通过容易的单罐水热途径制备。通过XRD，SEM，TEM，XPS和FTIR研究了材料特征。原始CuO纳米棒（CNR）的直径和长度分别为30-60次，分别为150-200nm。 CNRS结构没有受到Au官能化的显着影响。直径小于20nm的Au纳米颗粒均匀分布在2mol％au-cnrs的表面上。气体传感试验结果表明，室温NO_2检测可以通过Au-官能化的CuO纳米棒，尤其是2mol％的Au-CNRs来实现，其表现出3〜20ppm NO_2的响应和恢复时间为8 s和176s在室温（25°C）。该样品还显示出良好的选择性和再现性与NO_2。通过使用Au官能化的能带隙和活化能量改变能量带隙和激活能量来研究基于CNR基材料与NO_2的相关感测机制。

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  • 来源
    《Sensors and Actuators》 |2021年第2期|129070.1-129070.10|共10页
  • 作者

    Xiangxiang Chen; Sikai Zhao; Pengfei Zhou; Baoyu Cui; Wenbao Liu; Dezhou Wei; Yanbai Shen;

  • 作者单位

    College of Zijin Mining Fuzhou University Fuzhou 350108 China School of Resources and Civil Engineering Northeastern University Shenyang 110819 China;

    School of Resources and Civil Engineering Northeastern University Shenyang 110819 China;

    School of Resources and Civil Engineering Northeastern University Shenyang 110819 China;

    School of Resources and Civil Engineering Northeastern University Shenyang 110819 China;

    School of Resources and Civil Engineering Northeastern University Shenyang 110819 China;

    School of Resources and Civil Engineering Northeastern University Shenyang 110819 China;

    School of Resources and Civil Engineering Northeastern University Shenyang 110819 China State Key Laboratory of Rolling and Automation Northeastern University Shenyang 110189 China;

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  • 原文格式 PDF
  • 正文语种 eng
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  • 关键词

    CuO; Au functionalization; Room temperature; NO_2; Gas sensor;

    机译：cuo;Au功能化;室内温度;no_2;气体传感器;

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