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Preparation and Gas Sensing Performance of Hierarchical Porous ZnO-based Materials with Sunflower Rods as a Biological Template

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Abstract

A graded porous structure SnO2/ZnO composite was prepared with sunflower rods as a biological template. The prepared samples were subjected to phase analysis by scanning electron microscopy(SEM), transmission electron microscopy(TEM), X-ray diffractiometry(XRD) and X-ray photoelectron spectroscopy(XPS). ZnO sample was a pure phase of hexagonal wurtzite, and the template had been completely removed. The surface of the sample presented a honeycomb-like structure of a sunflower rod template, which was formed by interconnecting the porous channels, and had a smaller average size and exhibited n-n heterojunction at the n-type ZnO interface. Compared with that of pure ZnO, the response of the hierarchical porous structure SnO2/ZnO composite to 100 mg/L n-butanol reached a maximum of 40.61 at 240 °C, about 2.7 times higher than that of pure ZnO. Its response time and recovery time are 6 and 3 s, respectively, which are also better than those of pure ZnO. SnO2/ZnO composite exhibits good gas selectivity, which is related to the improvement of the structure and the forming of n-n heterojunctions of the material.

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Authors and Affiliations

  1. Second Hospital of Jilin University, Changchun, 130021, P. R. China

    Bowei Wang, Shu Chen, Bing Han & Defeng Yang

  2. Key Laboratory of Groundwater Resource and Environment, Ministry of Education, College of Environment and Resources, Jilin University, Changchun, 130021, P. R. China

    Qingrui Zeng, Tongtong Yue & Wei Feng

Authors
  1. Bowei Wang
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  2. Qingrui Zeng
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  3. Shu Chen
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  4. Tongtong Yue
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  5. Bing Han
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  6. Wei Feng
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  7. Defeng Yang
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Corresponding author

Correspondence to Defeng Yang.

Additional information

Supported by the Key Technology Research and Development Project of Jilin Province, China(No.20180201056YY) and the Medical Health Project of Jilin Province, China(No.20190304032YY).

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Wang, B., Zeng, Q., Chen, S. et al. Preparation and Gas Sensing Performance of Hierarchical Porous ZnO-based Materials with Sunflower Rods as a Biological Template. Chem. Res. Chin. Univ. 35, 755–761 (2019). https://doi.org/10.1007/s40242-019-9125-2

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  • DOI: https://doi.org/10.1007/s40242-019-9125-2

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