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Synthesis and properties of Ce-doped ZnO as a sensor for 1,2-propanediol

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Abstract

In this paper, Ce-doped ZnO gas sensors with different Ce/Zn ratios have been fabricated by a facile hydrothermal process, starting from zinc acetate dihydrate, cerium(III) nitrate hexahydrate and PEG. The microstructure, morphologies and components of pure ZnO and Ce-doped ZnO are characterized by X-ray diffraction, scanning electron microscope and energy dispersive spectrometer, respectively. The sensitivities to testing gases are investigated through the static testing system. Compared with pure ZnO, Ce-doped ZnO sensors showed relatively higher sensitivity and faster response/recovery time. Among them, 3 at.% Ce-doped ZnO sensor exhibited a maximum sensitivity of 560 (Ra/Rg) for 300 ppm of 1,2-propanediol at the optimum operating temperature of 260 °C and the response and recovery time is 4 s and 16 s, respectively. Finally, the gas-sensing mechanism of ZnO sensors is discussed.

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Acknowledgements

The authors are grateful for the Project 2014GZ0090 supported by the Science and Technology Support Program in Sichuan.

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Authors and Affiliations

  1. College of Material Science and Engineering, Sichuan University, Chengdu, 610065, Sichuan, People’s Republic of China

    Wenrui lu, Dachuan zhu & Xu xiang

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  1. Wenrui lu
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  2. Dachuan zhu
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  3. Xu xiang
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Correspondence to Dachuan zhu.

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lu, W., zhu, D. & xiang, X. Synthesis and properties of Ce-doped ZnO as a sensor for 1,2-propanediol. J Mater Sci: Mater Electron 28, 18929–18935 (2017). https://doi.org/10.1007/s10854-017-7846-x

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  • DOI: https://doi.org/10.1007/s10854-017-7846-x

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