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首页> 外文期刊>Nanotechnology >Size-tunable Ag nanoparticles sensitized porous ZnO nanobelts: controllably partial cation-exchange synthesis and selective sensing toward acetic acid
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Size-tunable Ag nanoparticles sensitized porous ZnO nanobelts: controllably partial cation-exchange synthesis and selective sensing toward acetic acid

机译：尺寸可调谐Ag纳米粒子致敏多孔ZnO纳米核：可控制的部分阳离子交换合成和朝向乙酸的选择性感测

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摘要

Porous ZnO nanobelts sensitized with Ag nanoparticles have been prepared via a partial cation-exchange reaction assisted by a thermal oxidation treatment, employing ZnSe center dot 0.5N(2)H(4) nanobelts as precursors. After partially exchanged with Ag+ cations, the belt-like morphology of the precursors is still preserved. Continuously calcined in air, they are in situ transformed into Ag nanoparticles sensitized porous ZnO nanobelts. The size of the Ag nanoparticles can be tuned through manipulating the amount of exchanging Ag+ cations. Considering the porous and belt-like nanostructure, sensing characteristics of ZnO and the catalytic activity of Ag nanoparticles, the gas sensing performances of the as-prepared Ag nanoparticles sensitized porous ZnO nanobelts have been carefully investigated. The results indicate that Ag nanoparticles significantly enhance the sensing performances of porous ZnO nanobelts toward typical volatile organic compounds. Especially, a good selectivity has been demonstrated toward acetic acid gas with a low detection limit less than 1 ppm. Furthermore, they also display a good reproducibility with a short response/recovery time due to the thin, uniform and porous sensing film, which is fabricated with the assembled technique and in situ calcined approach. Finally, their sensing mechanism has been further discussed.
机译：与银纳米颗粒敏化的多孔的ZnO纳米带已经通过由热氧化处理辅助部分阳离子交换反应制备，采用的ZnSe中心点0.5N（2）H（4）纳米带的前体。后部分有Ag +阳离子交换，该带状的前体的形态仍然保留。在空气中煅烧连续，但它们在原位转化成银纳米颗粒敏化的多孔的ZnO纳米带。银纳米颗粒的尺寸可以通过操纵交换的Ag +阳离子的量来调节。考虑ZnO的多孔和带状的纳米结构中，感测的特性和Ag纳米颗粒的催化活性，所制备的银纳米颗粒的气体感测性能敏化多孔的ZnO纳米带已经被仔细研究。结果表明，银纳米颗粒显著提高多孔的ZnO纳米带朝向典型的挥发性有机化合物的感测性能。特别是，良好的选择性已经证明朝向乙酸气体具有低检测限小于1ppm。此外，它们还由于薄的，均匀的和多孔探测膜，这是与组装技术和原位煅烧方法制造显示与短的响应/恢复时间重现性好。最后，他们的检测机制已经进一步讨论。

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  • 来源
    《Nanotechnology》 |2018年第44期|共12页
  • 作者

    Li Gang; Su Yao; Li Yong-Yu; Li Yi-Xiang; Guo Zheng; Huang Xing-Jiu; Liu Jin-Huai;

  • 作者单位

    Chinese Acad Sci Inst Intelligent Machines Key Lab Environm Opt &

    Technol Hefei 230031 Anhui Peoples R China;

    Chinese Acad Sci Inst Intelligent Machines Key Lab Environm Opt &

    Technol Hefei 230031 Anhui Peoples R China;

    Chinese Acad Sci Inst Intelligent Machines Key Lab Environm Opt &

    Technol Hefei 230031 Anhui Peoples R China;

    Chinese Acad Sci Inst Intelligent Machines Key Lab Environm Opt &

    Technol Hefei 230031 Anhui Peoples R China;

    Chinese Acad Sci Inst Intelligent Machines Key Lab Environm Opt &

    Technol Hefei 230031 Anhui Peoples R China;

    Chinese Acad Sci Inst Intelligent Machines Key Lab Environm Opt &

    Technol Hefei 230031 Anhui Peoples R China;

    Chinese Acad Sci Inst Intelligent Machines Key Lab Environm Opt &

    Technol Hefei 230031 Anhui Peoples R China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 特种结构材料;
  • 关键词

    partial cation-exchange reaction; Ag nanoparticles; porous ZnO nanobelt; gas sensing;

    机译：部分阳离子交换反应;Ag纳米颗粒;多孔ZnO纳米槽;气体感应;

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