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Polarity-enhanced gas-sensing performance of Au-loaded ZnO nanospindles synthesized via precipitation and microwave irradiation

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An Erratum to this article was published on 25 August 2016

Abstract

Loading noble metal and exploring suitable morphology to achieve excellent gas-sensing performance is very crucial for the fabrication of gas sensors. We have successfully synthesized Au-loaded ZnO (Au/ZnO) nanospindles (NSs) through a really facile procedure involving a precipitation and subsequent microwave irradiation. The as-prepared products have been characterized by X-ray diffraction (XRD), scanning electron microscope (SEM). The formation and gas-sensing mechanism of Au/ZnO NSs were discussed. The SEM micrographs revealed an interesting morphological evolution of the Au/ZnO NSs with Au-loading content ranging from 0 at. % to 7 at. %. The nanostructures were employed for gas-sensing measurement toward various gases. It indicated that the Au/ZnO NSs based sensor showed a highly enhanced response (226.81) to 400 ppm acetone gas at a relatively low working temperature (270°C), and exhibited a fast response (1 s) and recovery speed (10 s). The highly enhanced acetone gas sensitivity of Au/ZnO NSs based sensor could be attributed to its enhanced polarity owing to the peculiar morphology, Schottcky barriers, as well as catalytic effect of Au NPs.

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Authors and Affiliations

  1. College of Science, Civil Aviation University of China, Tianjin, 300300, PR China

    Yan Li, Tan Lv, Fang-Xian Zhao, Xiao-Xue Lian, Yun-Ling Zou & Qiong Wang

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  1. Yan Li
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  2. Tan Lv
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  3. Fang-Xian Zhao
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Correspondence to Yan Li.

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Li, Y., Lv, T., Zhao, FX. et al. Polarity-enhanced gas-sensing performance of Au-loaded ZnO nanospindles synthesized via precipitation and microwave irradiation. Electron. Mater. Lett. 12, 411–418 (2016). https://doi.org/10.1007/s13391-016-5391-z

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