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Synthesis of SnO_2 nanoparticles for formaldehyde detection with high sensitivity and good selectivity

机译：甲醛检测的SnO_2纳米粒子合成，具有高灵敏度和良好选择性

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摘要

During the detection of industrial hazardous gases, like formaldehyde (HCHO), the selectivity is still a challenging issue. Herein, an alternative HCHO chemosensor that based on the tin oxide nanoparticles is proposed, which was obtained through a facile hydrothermal method. Gas sensing performances showed that the optimal working temperature located at only 180 °C, the response value of 79 via 50 ppm HCHO was much higher than that of 35 at 230 °C. However, the compromised test temperature was selected as 230 "C, taking into account the faster response/recovery speeds than 180 °C, named 20/23versus 53/60 s, respectively. The response (35) of the SnO_2 nanoparticles-based sensor to 50 ppm of HCHO is about 400% higher than that of bulk SnO_2 sensor (9), especially when the gas concentration is 1 ppm, SnO_2 nanoparticles also has a higher sensitivity which may possibly result from more exposed active sites and small size effect for nanoparticles than for bulk ones. The gas sensor based on SnO_2 nanoparticles can be utilized as a promising candidate for practical low-temperature detectors of HCHO due to its higher gas response, excellent response-recovery properties, and perfect selectivity.
机译：在检测工业危险气体期间，如甲醛（HCHO），选择性仍然是一个具有挑战性的问题。在此，提出了一种基于氧化锡纳米颗粒的替代Hcho化学传感器，其通过容易水热法得到。气体传感性能表明，位于仅180℃的最佳工作温度，通过50ppm Hcho的响应值远高于230℃的35。然而，选择受损的测试温度为230“C，考虑到比180°C的更快的响应/恢复速度，分别命名为20 / 23Versus 53/60 s。基于SnO_2纳米粒子的传感器的响应（35）至50ppm的Hcho比散装SnO_2传感器（9）高约400％，特别是当气体浓度为1ppm时，SnO_2纳米颗粒也具有更高的灵敏度，这可能是可能由更暴露的活性位点产生的敏感性和小尺寸效应纳米粒子比散装物。基于SnO_2纳米颗粒的气体传感器由于其较高的气体响应，优异的响应 - 回收性能和完美的选择性，因此可以使用基于SnO_2纳米颗粒的有希望的低温探测器的候选者。

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  • 来源
    《Journal of Materials Research》 |2020年第16期|2208-2217|共10页
  • 作者

    Liping Gao; Hao Fu; Jiejun Zhu; Junhai Wang; Yuping Chen; Hongjie Liu;

  • 作者单位

    School of Materials and Chemical Engineering Chuzhou University Chuzhou 239000 China;

    Department of Science and Technology Shiyuan College of Nanning Normal University Nanning 530226 China School of Marine Sciences Guangxi University Nanning 530004 China;

    School of Materials and Chemical Engineering Chuzhou University Chuzhou 239000 China;

    School of Materials and Chemical Engineering Chuzhou University Chuzhou 239000 China;

    School of Materials and Chemical Engineering Chuzhou University Chuzhou 239000 China;

    Department of Science and Technology Shiyuan College of Nanning Normal University Nanning 530226 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);
  • 原文格式 PDF
  • 正文语种 eng
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