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首页> 外文期刊>Sensors and Actuators >Enhancement of gas-sensing characteristics of hydrothermally synthesized WO_3 nanorods by surface decoration with Pd nanoparticles
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Enhancement of gas-sensing characteristics of hydrothermally synthesized WO_3 nanorods by surface decoration with Pd nanoparticles

机译：通过Pd纳米粒子的表面修饰增强水热合成WO_3纳米棒的气敏特性

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摘要

Enhancement of the gas-sensing characteristics of nanostructured metal oxides by surface decoration with noble metal nanoparticles has recently received significant attention as a powerful technique for improving gas-sensing performance. Herein, we introduce a facile method of decorating tungsten oxide (WO_3) nanorods by palladium (Pd) nanoparticles to achieve enhanced NH_3 gas-sensing performance. The WO_3 nanorods were synthesized by a scalable hydrothermal method followed by thermal calcination to activate surface bonding for Pd decoration. Decoration of Pd nanoparticles on the surface of WO_3 was achieved through reduction of the complex Na_2PdCl_4 using Pluronic as both surfactant and reducing agent. The materials obtained were characterized by SEM, EDS, HRTEM, and XRD. The gas-sensing characteristics of bare WO_3 and Pd-WO_3 nanorods were tested for NH_3, CO, H_2, CO_2, and CH_4 detection at different temperatures. Results revealed that decoration of Pd nanoparticles on the surface of WO_3 nanorods significantly enhances the NH_3 gas-sensing characteristics of the metal oxide. The transient stability of the sensor determined after 10 on/off cycles of switching from air to gas demonstrated the effective reusability of the fabricated device.
机译：通过用贵金属纳米颗粒进行表面装饰来增强纳米结构金属氧化物的气敏特性最近作为一种改善气敏性能的强大技术而受到了广泛的关注。在这里，我们介绍了一种通过钯（Pd）纳米粒子装饰氧化钨（WO_3）纳米棒的简便方法，以实现增强的NH_3气敏性能。 WO_3纳米棒是通过可扩展的水热方法合成，然后进行热煅烧以激活用于Pd装饰的表面键合。通过使用Pluronic作为表面活性剂和还原剂还原络合物Na_2PdCl_4，可以在WO_3表面上装饰Pd纳米颗粒。通过SEM，EDS，HRTEM和XRD表征获得的材料。测试了裸WO_3和Pd-WO_3纳米棒的气敏特性，以在不同温度下检测NH_3，CO，H_2，CO_2和CH_4。结果表明，在WO_3纳米棒表面上装饰Pd纳米颗粒可显着增强金属氧化物的NH_3气敏特性。在从空气转换为气体的10个开/关循环后确定的传感器瞬态稳定性证明了所制造设备的有效可重用性。

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  • 来源
    《Sensors and Actuators》 |2016年第2期|453-460|共8页
  • 作者

    Pham Van Tong; Nguyen Duc Hoa; Nguyen Van Duy; Dang Thi Thanh Le; Nguyen Van Hieu;

  • 作者单位

    International Training Institute for Materials Science (ITIMS), Hanoi University of Science and Technology (HUST), No. 1, Dai Co Viet Road, Hanoi, Viet Nam,Department of Physics, Faculty of Mechanical Engineering, National University of Civil Engineering (NUCE), No. 55, Giai Phong Str., Hanoi, Viet Nam;

    International Training Institute for Materials Science (ITIMS), Hanoi University of Science and Technology (HUST), No. 1, Dai Co Viet Road, Hanoi, Viet Nam;

    International Training Institute for Materials Science (ITIMS), Hanoi University of Science and Technology (HUST), No. 1, Dai Co Viet Road, Hanoi, Viet Nam;

    International Training Institute for Materials Science (ITIMS), Hanoi University of Science and Technology (HUST), No. 1, Dai Co Viet Road, Hanoi, Viet Nam;

    International Training Institute for Materials Science (ITIMS), Hanoi University of Science and Technology (HUST), No. 1, Dai Co Viet Road, Hanoi, Viet Nam;

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

    WO_3 nanorods; Hydrothermal; Pd nanoparticles; Gas sensors;

    机译：WO_3纳米棒;水热钯纳米粒子气体传感器;

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