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Highly sensitive and selective liquefied petroleum gas sensor based on novel ZnO–NiO heterostructures

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Abstract

The fabrication of sensitive and selective liquefied petroleum gas (LPG) sensors is highly desirable for efficient detection of LPG. In this paper, we report fabrication of novel ZnO/NiO heterostructures for selective detection of LPG. X-ray diffraction (XRD) and Raman results indicated successful formation of ZnO/NiO heterostructures. Field emission scanning electron microscope (FESEM) results disclosed spherical shape of ZnO/NiO. The sensor based on ZnO/NiO heterostructures displayed higher sensor response, low detection limit and excellent selectivity towards 50 ppm of LPG. Interestingly, ZnO/NiO heterostructure based sensor presented elevated sensor response towards 50 ppm LPG at relatively low operable temperature. The response of ZnO–NiO heterostructures based sensor to 50 ppm of LPG was relatively higher than most of other reported LPG sensors. The excellent sensing property of present sensor towards LPG has been credited to creation of heterojunctions between ZnO and NiO nanoparticles. The gas sensing mechanism of ZnO/NiO heterostructure based sensor has been proposed and explained in detail which we claim that can be used for alarm applications with extremely high selectivity and sensitivity.

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Acknowledgements

We would like to thank Dr. Inderpreet Kaur (Senior Scientist) CSIO-CSIR Chandigarh for providing Raman characterization facility.

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Authors and Affiliations

  1. Department of Applied Physics, Chandigarh University, Gharuan, Mohali, India

    Gurpreet Singh

  2. Department of Physics, Guru Nanak Dev University, Amritsar, 143005, India

    Ravi Chand Singh

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  1. Gurpreet Singh
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  2. Ravi Chand Singh
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Correspondence to Ravi Chand Singh.

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Singh, G., Singh, R.C. Highly sensitive and selective liquefied petroleum gas sensor based on novel ZnO–NiO heterostructures. J Mater Sci: Mater Electron 30, 20010–20018 (2019). https://doi.org/10.1007/s10854-019-02368-9

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  • DOI: https://doi.org/10.1007/s10854-019-02368-9

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