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首页> 外文期刊>Journal of Hazardous Materials >Ex-situ XPS analysis of yolk-shell Sb_2O_3/WO_3 for ultra-fast acetone resistive sensor
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Ex-situ XPS analysis of yolk-shell Sb_2O_3/WO_3 for ultra-fast acetone resistive sensor

机译：用于超快速丙酮电阻传感器的yolk-shell sb_2o_3 / wo_3的ex-situ xps分析

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摘要

The preparation of fast, highly responsive and reliable gas sensing devices for the detection of acetone gas is considered to be a key challenge for the development of accurate disease diagnosis systems through exhaled respiratory gases. In the paper, yolk shell Sb2O3/WO3 is synthesized and its gas sensing performance was studied by static test system. Special, the maximum response value of 1:1 Sb2O3/WO3 yolk-shell (WO3-1 YSL) sensor to 100 ppm acetone can reach as high as 50.0 at 200 ?. And it also exhibits excellent response/recover time (4 s/5 s), low detection limit (2 ppm) and superior selectivity towards acetone. More importantly, in mixed selective gas test, the sensor shows high selectivity towards acetone. And the mechanism is analyzed by ex-situ XPS. The excellent gas-sensing performance can be attributed to unique yolk-shell structure, which facilitates the rapid transport of charge carriers from the surface to the bulk and provides more active sites for gas adsorption and desorption; the heterojunction between of Sb2O3 and WO3, which promotes oxygen pre-adsorption on the surface and increasing the interfacial potential; the increased oxygen vacancies which allowing more chemisorbed oxygen to form.
机译：用于检测丙酮气体的快速，高响应性和可靠的气体传感装置的制备被认为是通过呼出的呼吸气体进行准确疾病诊断系统的关键挑战。在本文中，合成了蛋黄壳SB2O3 / WO3，通过静态测试系统研究了其气体传感性能。特殊，最大响应值1：1 SB2O3 / WO3蛋白壳（WO3-1 YSL）传感器至100ppm丙酮可以高达50.0，在200时达到50.0。它还表现出优异的响应/回收时间（4 s / 5 s），低检测限（2 ppm）和对丙酮的优异选择性。更重要的是，在混合选择性气体测试中，传感器对丙酮显示出高选择性。通过前地XPS分析该机制。优异的气体传感性能可以归因于独特的蛋黄壳结构，这有利于将电荷载体从表面到散装的快速传输，并提供更多的气体吸附和解吸的有源位点; Sb2O3和WO3之间的异质结，其促进表面上的氧气预热并增加界面潜力;增加的氧空位，允许更加富化学吸附的氧。

著录项

  • 来源
    《Journal of Hazardous Materials》 |2021年第15期|125175.1-125175.13|共13页
  • 作者

    Wang Qiao; Wu Hongchang; Wang Yanrong; Li Jianpeng; Yang Yifan; Cheng Xu; Luo Yibing; An Beixi; Pan Xiaojun; Xie Erqing;

  • 作者单位

    Lanzhou Univ Sch Phys Sci & Technol Lanzhou 730000 Peoples R China;

    Lanzhou Univ Sch Phys Sci & Technol Lanzhou 730000 Peoples R China;

    Lanzhou Univ Sch Phys Sci & Technol Lanzhou 730000 Peoples R China;

    Lanzhou Univ Sch Phys Sci & Technol Lanzhou 730000 Peoples R China;

    Lanzhou Univ Sch Phys Sci & Technol Lanzhou 730000 Peoples R China;

    Lanzhou Univ Sch Phys Sci & Technol Lanzhou 730000 Peoples R China;

    Lanzhou Univ Sch Phys Sci & Technol Lanzhou 730000 Peoples R China;

    Lanzhou Univ Sch Phys Sci & Technol Lanzhou 730000 Peoples R China;

    Lanzhou Univ Sch Phys Sci & Technol Lanzhou 730000 Peoples R China;

    Lanzhou Univ Sch Phys Sci & Technol Lanzhou 730000 Peoples R China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    WO3 composites; Acetone sensor; Mixture gas test; Ex-situ XPS;

    机译：WO3复合材料;丙酮传感器;混合气体试验;前原位XPS;

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