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首页> 外文期刊>Applied Surface Science >Integration of mesoporous ZnO and Au@ZnO nanospheres into sensing device for the ultrasensitive CH_3COCH_3 detection down to ppb levels
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Integration of mesoporous ZnO and Au@ZnO nanospheres into sensing device for the ultrasensitive CH_3COCH_3 detection down to ppb levels

机译：中孔ZnO和Au @ ZnO纳米体的整合在超敏性CH_3COCH_3检测到PPB水平的传感装置中

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摘要

Surface modification of metal oxide nanostructures with noble metals has attracted significant attention of researchers because of their importance in gas sensing applications. In this regard, mesoporous zinc oxide nanospheres (ZnO NSs) were designed through a simple template-free solvothermal approach and successive anchoring of gold nanoparticles (Au NPs) onto it was achieved through a chemical process followed by thermal treatment. The synergistic effects of different Au NPs loadings onto the structure, surface morphology, element contents, as well as chemiresistive gas sensing activities of solvothermal-mediated ZnO NSs were examined thoroughly and discussed. Gas sensing studies demonstrated that the sensor based on Au@ZnO-3 NSs exhibits excellent acetone (CH3COCH3) sensing characteristics (Response = 194) compared to pristine ZnO NSs sensor (Response = 2.86) at a lower temperature of 170 degrees C. Besides, Au@ZnO NSs sensor is able to detect CH3COCH3 concentration down to ppb-levels (500 ppb) with excellent response repeatability. Observed CH3COCH3 sensing performances of all the Au loaded ZnO NSs sensors were found to be almost 50 times higher than pristine ZnO NSs sensor. Such an excellent CH3COCH3 sensing performance of Au@ZnO NSs is mainly credited to the catalytic activity of Au NPs and the strong metal-semiconductor contacts between Au NPs and ZnO NSs.
机译：由于其在气体传感应用中的重要性，具有贵金属的金属氧化物纳米结构的表面改性引起了研究人员的重大关注。在这方面，通过简单的无模板溶液方法设计介孔氧化锌纳米球（ZnO NSS），并通过化学过程实现了通过化学过程实现的金纳米颗粒（Au NP）的连续锚固，然后进行热处理。彻底讨论了不同AU NPS载体对结构，表面形态，元素内容的协同效应，表面形态，元素内容，以及溶剂热介导的ZnO NSS的化切削气体感应活性。气体传感研究表明，基于Au @ ZnO-3NSS的传感器具有优异的丙酮（CH3COCH3）感测特性（响应= 194），与原始ZnO NSS传感器（响应= 2.86）在170℃的较低温度下相比， AU @ ZnO NSS传感器能够以优异的反应重复性检测到PPB级别（500ppb）的CH3COCH 3浓度。观察到的CH3COCH3感测所有AU加载的ZnO NSS传感器的性能几乎比原始ZnO NSS传感器高的50倍。 Au @ ZnO NSS的这种优异的CH3COCH3感测性能主要归因于Au nps和Au nps和Zno nss之间的强金属半导体触点的催化活性。

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  • 来源
    《Applied Surface Science》 |2020年第jul15期|146223.1-146223.12|共12页
  • 作者

    Cao P. J.; Huang Q. G.; Navale S. T.; Fang M.; Liu X. K.; Zeng Y. X.; Liu W. J.; Stadler F. J.; Lu Y. M.;

  • 作者单位

    Shenzhen Univ Shenzhen Engn Lab Adv Technol Ceram Guangdong Res Ctr Interfacial Engn Funct Mat Shenzhen Key Lab Special Funct Mat Shenzhen 518055 Peoples R China|Shenzhen Univ Coll Mat Sci & Engn Shenzhen 518055 Peoples R China;

    Shenzhen Univ Shenzhen Engn Lab Adv Technol Ceram Guangdong Res Ctr Interfacial Engn Funct Mat Shenzhen Key Lab Special Funct Mat Shenzhen 518055 Peoples R China|Shenzhen Univ Coll Mat Sci & Engn Shenzhen 518055 Peoples R China;

    Shenzhen Univ Shenzhen Engn Lab Adv Technol Ceram Guangdong Res Ctr Interfacial Engn Funct Mat Shenzhen Key Lab Special Funct Mat Shenzhen 518055 Peoples R China|Shenzhen Univ Coll Mat Sci & Engn Shenzhen 518055 Peoples R China|Shenzhen Univ Nanshan Dist Key Lab Biopolymers & Safety Evaluat Guangdong Res Ctr Interfacial Engn Funct Mat Shenzhen Key Lab Polymer Sci & Technol Coll Mat S Shenzhen 518055 Peoples R China;

    Shenzhen Univ Shenzhen Engn Lab Adv Technol Ceram Guangdong Res Ctr Interfacial Engn Funct Mat Shenzhen Key Lab Special Funct Mat Shenzhen 518055 Peoples R China|Shenzhen Univ Coll Mat Sci & Engn Shenzhen 518055 Peoples R China;

    Shenzhen Univ Shenzhen Engn Lab Adv Technol Ceram Guangdong Res Ctr Interfacial Engn Funct Mat Shenzhen Key Lab Special Funct Mat Shenzhen 518055 Peoples R China|Shenzhen Univ Coll Mat Sci & Engn Shenzhen 518055 Peoples R China;

    Shenzhen Univ Shenzhen Engn Lab Adv Technol Ceram Guangdong Res Ctr Interfacial Engn Funct Mat Shenzhen Key Lab Special Funct Mat Shenzhen 518055 Peoples R China|Shenzhen Univ Coll Mat Sci & Engn Shenzhen 518055 Peoples R China;

    Shenzhen Univ Shenzhen Engn Lab Adv Technol Ceram Guangdong Res Ctr Interfacial Engn Funct Mat Shenzhen Key Lab Special Funct Mat Shenzhen 518055 Peoples R China|Shenzhen Univ Coll Mat Sci & Engn Shenzhen 518055 Peoples R China;

    Shenzhen Univ Nanshan Dist Key Lab Biopolymers & Safety Evaluat Guangdong Res Ctr Interfacial Engn Funct Mat Shenzhen Key Lab Polymer Sci & Technol Coll Mat S Shenzhen 518055 Peoples R China;

    Shenzhen Univ Shenzhen Engn Lab Adv Technol Ceram Guangdong Res Ctr Interfacial Engn Funct Mat Shenzhen Key Lab Special Funct Mat Shenzhen 518055 Peoples R China|Shenzhen Univ Coll Mat Sci & Engn Shenzhen 518055 Peoples R China;

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  • 正文语种 eng
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  • 关键词

    Metal oxides; Zinc oxide; Noble metals; Nanospheres; Schottky junction; CH3COCH3 sensor;

    机译：金属氧化物;氧化锌;贵金属;纳米球;肖特基结;CH3COCH3传感器;

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