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Effect of gas sensing properties by Sn-Rh codoped ZnO nanosheets

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Abstract

The hierarchically porous Sn-Rh codoped ZnO, Sn-doped ZnO and pure ZnO nanosheets have been successfully synthesized through a simple hydrothermal reaction process without any surfactant or template at 180°C. The morphology and composition were carefully characterized by X-ray diffraction, energy dispersive X-ray spectrometer, field emission scanning electronic microscopy and BET. The gas-sensing testing results indicated that the Sn-Rh codoped ZnO nanosheets, with the specific surface area was 26.9 m2/g, exhibited enhanced gas-sensing performance compared with that of pure ZnO and Sn-doped ZnO. The high sensitivity of the sensor based on Sn-Rh codoped ZnO was 149.38 to 100 ppm ethanol and the detection limit was less than 5 ppm (5.8). The response and recovery times were measured to be ∼3 s and ∼10 s when exposed to 100 ppm ethanol at the test temperature of 300°C. The good sensing performance of the Sn-Rh codoped ZnO sensor indicated that hierarchically porous Sn-Rh codoped ZnO could be a promising candidate for highly sensitive gas sensors.

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Authors and Affiliations

  1. Provincial Key Laboratory of Plasma Chemistry & Advanced Materials, Wuhan Institute of Technology, Wuhan, 430074, PR China

    Ziwei Chen, Zhidong Lin, Mengying Xu, Yuyuan Hong, Na Li, Ping Fu & Ze Chen

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  1. Ziwei Chen
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  2. Zhidong Lin
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  3. Mengying Xu
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  4. Yuyuan Hong
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  5. Na Li
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  6. Ping Fu
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  7. Ze Chen
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Correspondence to Zhidong Lin.

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Chen, Z., Lin, Z., Xu, M. et al. Effect of gas sensing properties by Sn-Rh codoped ZnO nanosheets. Electron. Mater. Lett. 12, 343–349 (2016). https://doi.org/10.1007/s13391-016-6053-x

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  • DOI: https://doi.org/10.1007/s13391-016-6053-x

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