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Ethanol sensing properties of porous ZnO spheres via hydrothermal route

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Abstract

ZnO spheres composed of porous flakes were prepared by template-free, economical hydrothermal method combined with heat treatment. The high-density pores with the size in tens of nanometers were found distributed through each piece of the flake. The sensor based on porous ZnO spheres showed improved ethanol response compared to that based on commercial ZnO powders. ZnO spheres sensor showed obvious response to 2 ppm ethanol at the operation temperature of 280 °C, with the corresponding response value of 2.8 and the response and recovery times of 10 and 15 s, respectively. The response of the sensor increased linearly with the concentration of ethanol in the range of 2–500 ppm. The good sensing performance of the ZnO sphere sensor to ethanol gas indicated that the ZnO sphere could be a promising candidate as the building block for highly sensitive and reliable gas sensor.

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Acknowledgements

This study was supported by the National Natural Science Foundation of China (Grant No. 50602040, 11104253 and 10574112), and the Science and Technology Project on Key Problems of Henan Province (Grant No. 082101510007).

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Authors and Affiliations

  1. Department of Physics and Laboratory of Material Physics, Zhengzhou University, Zhengzhou, 450052, People’s Republic of China

    Wenchuang Wang, Yongtao Tian, Xinchang Wang, Hao He, Yurui Xu, Chuan He & Xinjian Li

  2. Henan Ancai High-technology Co., Ltd, Henan, 455000, Anyang, People’s Republic of China

    Yongtao Tian

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  1. Wenchuang Wang
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  7. Xinjian Li
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Correspondence to Yongtao Tian.

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Wang, W., Tian, Y., Wang, X. et al. Ethanol sensing properties of porous ZnO spheres via hydrothermal route. J Mater Sci 48, 3232–3238 (2013). https://doi.org/10.1007/s10853-012-7103-x

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