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Synthesis of flower-like porous ZnO and their ultrahigh acetone sensing properties

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Abstract

Flower-like porous ZnO was successfully synthesized by a simple hydrothermal method followed by calcination. The morphologies of the as-prepared materials were characterized by scanning electron microscopy (SEM) and the crystal structures were determined by X-ray diffraction. It can be seen in SEM images that each flower-like ZnO unit is composed of randomly arranged ZnO thin flakes which makes the materials extremely porous. Meanwhile, there are numerous through-holes distributed on the surface of ZnO flakes. The gas-sensing properties of the as-prepared materials were investigated, and the results indicate the ultrahigh sensing properties of flower-like porous ZnO to acetone. The response of flower-like porous ZnO sensors to 50 ppm acetone is about 97.8 at the optimum operating temperature of 280 °C. The response and recovery times to 50 ppm acetone are about 2 and 23 s, respectively. Moreover, even at low concentrations of 0.25, 1 and 10 ppm acetone high responses can be observed with the values of 6.7, 15.8 and 30.1. In addition, the as-synthesized flower-like ZnO shows excellent selectivity to acetone and the response to 50 ppm acetone (97.8) is about 4.43 times larger than ethanol (22.1) at the same concentration, which can successfully distinguish acetone and ethanol.

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Acknowledgments

This study was funded by the Jilin Provincial Science and Technology Department (No. 20140204027GX).

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Authors and Affiliations

  1. State Key Laboratory of Superhard Materials, College of Physics, Jilin University, Changchun, 130012, People’s Republic of China

    Xuesong Wang, Yu Li, Li Liu, Lianyuan Wang, Han Wang & Xuexin Guo

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  1. Xuesong Wang
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  2. Yu Li
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  3. Li Liu
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  4. Lianyuan Wang
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  5. Han Wang
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  6. Xuexin Guo
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Correspondence to Li Liu.

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Wang, X., Li, Y., Liu, L. et al. Synthesis of flower-like porous ZnO and their ultrahigh acetone sensing properties. J Porous Mater 24, 463–468 (2017). https://doi.org/10.1007/s10934-016-0281-1

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