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首页> 外文期刊>RSC Advances >Fabrication of LaFeO3 and rGO-LaFeO3 microspheres based gas sensors for detection of NO2 and CO
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Fabrication of LaFeO3 and rGO-LaFeO3 microspheres based gas sensors for detection of NO2 and CO

机译：Lafeo3和Rgo-Lafeo3基于Microsh的气体传感器的制造，用于检测NO2和CO

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摘要

In the present report, gas sensing devices based on LaFeO3 and rGO-LaFeO3 were fabricated by a photolithography technique. The X-ray diffraction, Raman spectra and FT-IR results confirm the formation of a perovskite phase and composite. XPS and TEM give the chemical compositions for both products. The higher roughness, greater surface area (62.1 m(2) g(-1)), larger pore size (16.4 nm) and lower band gap (1.94 eV) of rGO-LaFeO3 make it a suitable candidate to obtain high sensitivity. The gas sensing performance of the devices was investigated for various concentrations of NO2 and CO gases at temperatures of 200 and 250 degrees C. It was observed that the rGO-LaFeO3 based device exhibited a high relative response (183.4%) for a 3 ppm concentration of NO2 at a 250 degrees C operating temperature. This higher response is attributed to the large surface area, greater surface roughness, and numerous active sites of rGO-LaFeO3. The gas sensing properties investigated show that rGO-LaFeO3 is an excellent candidate for an NO2 sensor.
机译：在本报告中，通过光刻技术制造基于Lafeo3和Rgo-LafeO3的气体传感装置。 X射线衍射，拉曼光谱和FT-IR结果证实了钙钛矿相和复合材料的形成。 XPS和TEM为两种产品提供化学成分。更高的粗糙度，更大的表面积（62.1m（2）g（-1）），较大的孔径（16.4nm）和rgo-lafeo3的较低带隙（1.94ev）使其成为获得高灵敏度的合适候选者。研究了装置的气体传感性能，在200和250℃的温度下进行各种浓度的NO2和CO气体。观察到基于RGO-LafeO3的装置表现出3ppm浓度的高相对反应（183.4％） 250摄氏度的NO2。这种更高的响应归因于大的表面积，更大的表面粗糙度和RGO-Lafeo3的众多活性位点。调查的气体传感特性表明RGO-Lafeo3是No2传感器的优异候选者。

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  • 来源
    《RSC Advances》 |2020年第3期|共12页
  • 作者

    Sharma Neeru; Kushwaha Himmat Singh; Sharma S. K.; Sachdev K.;

  • 作者单位

    Malaviya Natl Inst Technol Dept Phys Jaipur 302017 Rajasthan India;

    Malaviya Natl Inst Technol Mat Res Ctr Jaipur 302017 Rajasthan India;

    Malaviya Natl Inst Technol Dept Phys Jaipur 302017 Rajasthan India;

    Malaviya Natl Inst Technol Dept Phys Jaipur 302017 Rajasthan India;

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  • 正文语种 eng
  • 中图分类 化学;
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