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首页> 外文期刊>Sensors and Actuators >Functionalized MWCNTs effects on dramatic enhancement of MWCNTs/SnO_2 nanocomposite gas sensing properties at low temperatures
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Functionalized MWCNTs effects on dramatic enhancement of MWCNTs/SnO_2 nanocomposite gas sensing properties at low temperatures

机译：功能化的MWCNTs对低温下MWCNTs / SnO_2纳米复合气体传感特性的显着增强

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摘要

Multiwall carbon nanotubes (MWCNTs)/SnO_2 nanocomposites containing 0.03-1.0 wt% MWCNTs were synthesized and used for the fabrication of gas sensors for ethanol, methane, CO and NO detection at low temperatures. Acid functionalized MWCNTs were dispersed in SnO_2 using ultrasonic-assisted deposition-precipitation method. The nanocomposites were characterized by BET surface area measurement, FE-SEM, and XRD. The sensors response to 100 ppm ethanol, CO and NO and 1 % CH_4 were measured at a temperature range of 150-350 ℃ The addition of carbon nanotubes causes up to 4.7 times decrease in SnO_2 nanoparticles sizes. Our results indicate that 0.05 wt% is the optimum amount of carbon nanotubes, which remarkably increases the response of the SnO_2 -based sensors to all the gases. The most considerable response of 0.05 wt% MWCNTs/SnO_2 nanocomposite sensor is related to CH_4 detection, which is dramatically enhanced by a factor of 45 at 200 ℃, compared to SnO_2. Moreover, this sensor operating temperature for ethanol, CO and methane decrease by about 50-100℃, upon addition of carbon nanotubes.
机译：合成了包含0.03-1.0 wt％MWCNTs的多壁碳纳米管（MWCNTs）/ SnO_2纳米复合材料，并用于制造用于低温检测乙醇，甲烷，CO和NO的气体传感器。采用超声辅助沉积沉淀法将酸官能化的多壁碳纳米管分散在SnO_2中。通过BET表面积测量，FE-SEM和XRD表征纳米复合材料。在150-350℃的温度范围内测量了传感器对100 ppm乙醇，CO和NO和1％CH_4的响应。添加碳纳米管会导致SnO_2纳米颗粒尺寸减少多达4.7倍。我们的结果表明，碳纳米管的最佳含量为0.05 wt％，这显着增加了SnO_2基传感器对所有气体的响应。 0.05 wt％MWCNTs / SnO_2纳米复合传感器的最显着响应与CH_4检测有关，与SnO_2相比，CH_4检测在200℃时显着提高了45倍。此外，添加碳纳米管后，乙醇，一氧化碳和甲烷的传感器工作温度降低了约50-100℃。

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  • 来源
    《Sensors and Actuators》 |2016年第2期|252-260|共9页
  • 作者

    Sara Bonabi Naghadeh; Sahar Vahdatifar; Yadollah Mortazavi; Abbas Ali Khodadadi; Alireza Abbasi;

  • 作者单位

    School of Chemistry, College of Science, University of Tehran, Tehran, Iran;

    Catalysis and Nanostructured Materials Research Laboratory, School of Chemical Engineering, College of Engineering, University of Tehran, Tehran, Iran;

    Catalysis and Nanostructured Materials Research Laboratory, School of Chemical Engineering, College of Engineering, University of Tehran, Tehran, Iran,Nanoelectronics Centre of Excellence, University of Tehran, Tehran, Iran;

    Catalysis and Nanostructured Materials Research Laboratory, School of Chemical Engineering, College of Engineering, University of Tehran, Tehran, Iran,NanoBioMedicine Centre of Excellence, Nanoscience and Nanotechnology Research Center, University of Tehran, Tehran, Iran;

    School of Chemistry, College of Science, University of Tehran, Tehran, Iran;

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

    Carbon nanotubes; Tin oxide; Nanocomposite; Gas sensor; NO_x;

    机译：碳纳米管;氧化锡纳米复合材料气体传感器NO_x;

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