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首页> 外文期刊>RSC Advances >NiO decorated CeO2 nanostructures as room temperature isopropanol gas sensors
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NiO decorated CeO2 nanostructures as room temperature isopropanol gas sensors

机译：NIO装饰CEO2纳米结构作为室温异丙醇气体传感器

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摘要

Heterostructures developed using CeO2 show promising peculiarities in the field of metal oxide gas sensors due to the great variations in the resistance during the adsorption and desorption processes. NiO decorated CeO2 nanostructures (NiO/CeO2) were synthesized via a facile two-step process. High resolution transmission electron microscopy (HRTEM) results revealed the perfect decoration of NiOon the CeO2 surface. The porous nature of the NiO/CeO2 sensor surface was confirmed fromscanning electron microscopy (SEM) analysis. Gas sensing studies of pristine CeO2 and NiO/CeO2 sensors were performed under room conditions and enhanced gas sensing properties for the NiO/CeO2 sensor towards isopropanol were observed. Decoration of NiO on the CeO2 surface develops a built-in potential at the interface of NiO and CeO2 which played a vital role in the superior sensing performance of the NiO/CeO2 sensor. Sharp response and recovery times (15 s/19 s) were observed for the NiO/CeO2 sensor towards 100 ppm isopropanol at room temperature. Long-term stability of the NiO/CeO2 sensor was also studied and discussed. From all the results it is concluded that the decoration of NiO on the CeO2 surface could significantly enhance the sensing performance and it has great advantages in designing best performing isopropanol gas sensors.
机译：使用CEO2开发的异质结构在金属氧化物气体传感器领域中显示出承诺的特性，由于在吸附和解吸过程中的电阻差异很大。 NIO装饰CEO2纳米结构（NIO / CEO2）通过容易的两步过程合成。高分辨率透射电子显微镜（HRTEM）结果显示了CEO2表面的完美装饰。从扫描电子显微镜（SEM）分析，确认了NIO / CEO2传感器表面的多孔性质。在室内条件下进行原始CeO2和NiO / CeO2传感器的气体传感研究，观察到NIO / CEO2传感器的增强的气体传感性能朝异丙醇进行。 CEO2表面上的NIO的装饰在NIO和CEO2的界面中开发了内置潜力，这在NIO / CEO2传感器的卓越传感性能中起着至关重要的作用。将NIO / CEO2传感器朝向100ppm异丙醇在室温下观察到急需响应和恢复时间（15 s / 19 s）。还研究了NIO / CEO2传感器的长期稳定性和讨论。从所有结果中得出结论，CEO2表面上NIO的装饰可以显着提高传感性能，并且在设计最佳性能的异丙醇气体传感器方面具有很大的优势。

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  • 来源
    《RSC Advances》 |2019年第24期|共11页
  • 作者

    Jayababu Nagabandi; Poloju Madhukar; Shruthi Julakanti; Reddy M. V. Ramana;

  • 作者单位

    Osmania Univ Dept Phys Thin Films &

    Nano Mat Res Lab Hyderabad 500007 Telangana India;

    Osmania Univ Dept Phys Thin Films &

    Nano Mat Res Lab Hyderabad 500007 Telangana India;

    Osmania Univ Dept Phys Thin Films &

    Nano Mat Res Lab Hyderabad 500007 Telangana India;

    Osmania Univ Dept Phys Thin Films &

    Nano Mat Res Lab Hyderabad 500007 Telangana India;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 化学;
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