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Al-Doped Dumbbell-Like ZnO for Enhanced Ethanol Sensing Performance

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Abstract

A dumbbell-like Al doped ZnO(AZO) microstructure was successfully synthesized via a facile, controllable and one-pot hydrothermal method. The samples were characterized by XRD, SEM, EDS and TEM. It showed that all the samples present dumbbell-like structure composed of highly crystalline hexagonal wurtzite ZnO. The dumbbell-like structure is formed through the self-assembly of Al-dopled ZnO nanodisks. Gas sensing tests reveal that the Al-doped dumbbell-like ZnO microstructure (3 at %) shows excellent gas sensing response (5.37 for ethanol with 1 ppm) for ethanol with shorter response-recovery time (53 s/21 s). The notable sensing performance could be mainly attributed to the increased content of oxygen vacancy in ZnO due to the Al doping. Thus, the Al-doped dumbbell-like ZnO microstructures could provide an inspiration for the design and preparation of the highly sensitive ethanol gas sensor with the controllable electronic structure.

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ACKNOWLEDGMENTS

We are grateful for Project supported by the Nature Science Foundation of Heilongjiang Province of China (grant no. JJ2019LH0021) and the Youth Doctor Foundation of Harbin university (grant no. HUDF2017105).

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Authors and Affiliations

  1. Harbin University, Heilongjiang, 150086, Harbin, China

    Li Zan & Zhang Hong-Kun

  2. Harbin Institute of Technology, Heilongjiang, 150001, Harbin, China

    Jiang Wen-Rui

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  1. Li Zan
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  2. Zhang Hong-Kun
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Zan, L., Hong-Kun, Z. & Wen-Rui, J. Al-Doped Dumbbell-Like ZnO for Enhanced Ethanol Sensing Performance. Russ J Appl Chem 93, 1960–1967 (2020). https://doi.org/10.1134/S1070427220120204

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