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Fabrication of novel hierarchical ZnO via ultrasonic assisted hydrothermal route and their gas sensing property

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Abstract

Novel hierarchical ZnO nanomaterials with castellated and turriform morphologies were successfully synthesized by ultrasonic assisted hydrothermal route. The morphology and structure of products were characterized by scanning electron microscopy and X-ray diffraction, respectively. The results show that as-prepared castellated ZnO microrods have six-equal axis symmetry features with the length of 2–4 μm and the diameter of about 1 μm, and ZnO with turriform morphology has radical branch structure with the diameter ranging from 500 to 700 nm. It is found that initial alkaline concentration of the solution plays a crucial role in determining two kinds of hierarchical morphologies by etching ZnO crystal during hydrothermal process. A possible formation mechanism of castellated and turriform ZnO microstructures is also proposed. Gas sensing of hierarchical ZnO to different gases was also examined. The result indicates turriform ZnO sensor has fast response properties and excellent selective resolution capability to C2H5OH gas.

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Acknowledgments

The work is supported by the National Natural Science Foundation of China (No. 51201052), the Innovative Talent Fund of Harbin City (No. 2012RFQXG107), the Natural Science Foundation of Heilongjiang Province of China (No. E201056), and the Program for Youth Academic Backbone in Heilongjiang Provincial University.

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  1. College of Materials Science and Engineering, Harbin University of Science and Technology, Harbin, 150040, People’s Republic of China

    J. J. Zhang, E. J. Guo, H. Y. Yue, L. P. Wang, C. Y. Zhang, J. Chang & X. Gao

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  1. J. J. Zhang
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  2. E. J. Guo
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  3. H. Y. Yue
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  4. L. P. Wang
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Correspondence to E. J. Guo.

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Zhang, J.J., Guo, E.J., Yue, H.Y. et al. Fabrication of novel hierarchical ZnO via ultrasonic assisted hydrothermal route and their gas sensing property. J Mater Sci: Mater Electron 24, 3435–3441 (2013). https://doi.org/10.1007/s10854-013-1267-2

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  • DOI: https://doi.org/10.1007/s10854-013-1267-2

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