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Design of Cr2O3@ZnO Hetero-junction Hierarchical Nanostructures with Enhanced Xylene-sensing Properties

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Abstract

Cr2O3@ZnO hetero-junction hierarchical nanostructures were designed to be enhanced xylene sensing material, and thereinto, flower-like ZnO hierarchical nanostructures were synthesized via a solution-based method, and then Cr2O3 particles were developed on the surface of ZnO petals via a solvothermal method. From the results of XRD patterns, SEM and TEM images, it can be observed that ZnO has a high-quallity crystallinity and Cr2O3 particles scatter uniformly on the suruface of ZnO. The products with different ratios of Cr2O3 were used to fabricate gas sensors, and the result indicates that the hetero-junction structures prompt the response to xylene, and the reason may be attributed to the decrease of main carriers concentration caused by the p-n junction between ZnO(n-type semiconductor) and Cr2O3(p-type semiconductor), as well as the catalytic oxidation effect on methyl groups of the xylene by Cr2O3.

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Authors and Affiliations

  1. State Key Laboratory on Integrated Optoelectronics, College of Electronic Science and Engineering, Jilin University, Changchun, 130012, P. R. China

    Qixuan Qin, Zheng Shen, Nan Zhang & Xindong Zhang

Authors
  1. Qixuan Qin
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  2. Zheng Shen
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  3. Nan Zhang
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  4. Xindong Zhang
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Corresponding author

Correspondence to Xindong Zhang.

Additional information

Supported by the National Natural Science Foundation of China(No.11574110), the Project of Science and Technology Development Plan of Jilin Province, China(No.20160204013GX), the Project of Statistic Analysis of Gas Sensitive Materials, China, the Opened Fund of the State Key Laboratory on Applied Optics and the Opened Fund of the State Key Laboratory on Integrated Optoelectronics of China(No.IOSKL2013KF10).

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Qin, Q., Shen, Z., Zhang, N. et al. Design of Cr2O3@ZnO Hetero-junction Hierarchical Nanostructures with Enhanced Xylene-sensing Properties. Chem. Res. Chin. Univ. 34, 169–174 (2018). https://doi.org/10.1007/s40242-018-7237-8

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  • DOI: https://doi.org/10.1007/s40242-018-7237-8

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