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Synthesis and characterization of La- and Ce-codoped polycrystal ZnO prepared by hydrothermal method for 1,2-propanediol

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Abstract

La/Ce-codoped ZnO (La/Ce–ZnO)-based gas sensors are successfully prepared by a simple mild hydrothermal method. And the structures, morphologies and sensing properties are examined by XRD, SEM and XPS, respectively. The 1,2-propanediol gas-sensing analysis reveals that the La/Ce–ZnO-based gas sensor displays the highest response compared with La-doped ZnO and Ce-doped ZnO sensors. La/Ce–ZnO-based gas sensor exhibits an excellent response (681) and possesses good response and recovery property of 11 and 45 s to 100 ppm 1,2-propanediol at 240 °C, respectively. The mechanism of gas sensing and enhanced gas response of La/Ce–ZnO is discussed.

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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

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  1. Wenrui Lu
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  2. Dachuan Zhu
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Correspondence to Dachuan Zhu.

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Lu, W., Zhu, D. Synthesis and characterization of La- and Ce-codoped polycrystal ZnO prepared by hydrothermal method for 1,2-propanediol. Appl. Phys. A 125, 68 (2019). https://doi.org/10.1007/s00339-019-2380-8

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  • DOI: https://doi.org/10.1007/s00339-019-2380-8

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