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Hierarchical In2O3 nanostructures for improved formaldehyde: sensing performance

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Abstract

Formaldehyde (HCHO) gas is a hazardous indoor air pollutant; thus, it is urgent to achieve rapid and accurate detection of HCHO. In this paper, hierarchical In2O3 nanostructures have been prepared via a simple hydrothermal method. The phase purity, morphology, microstructure are characterized by XRD, SEM and TEM. The HCHO sensing performances of the as-synthesized In2O3 samples-based sensor are systematically studied. The sensor displays ultra-fast response speed, excellent selectivity, sensitivity, and stability. The response time to 50 ppm formaldehyde is about 0.9 s and the response value is 22. The enhanced gas sensing characteristics can be ascribed to unique hierarchical nanostructures composed with orderly arranged nanrods. These performances make the hierarchical In2O3 nanostructures a hopeful candidate for formaldehyde sensor in practical applications.

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Acknowledgments

This work was funded by the National Natural Science Foundation of China, No. 61904158, the Natural Science Foundation of the Jiangsu Higher Education Institutions of China, 20KJB140022.

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Authors and Affiliations

  1. School of Physics and Electronics Engineering, Yancheng Teachers University, Yancheng, 224002, China

    Xiaoxiang Huang, Ziyi Tang, Zhaopei Tan, Shihao Sheng & Qi Zhao

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  1. Xiaoxiang Huang
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  2. Ziyi Tang
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  3. Zhaopei Tan
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  4. Shihao Sheng
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  5. Qi Zhao
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Correspondence to Qi Zhao.

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Huang, X., Tang, Z., Tan, Z. et al. Hierarchical In2O3 nanostructures for improved formaldehyde: sensing performance. J Mater Sci: Mater Electron 32, 11857–11864 (2021). https://doi.org/10.1007/s10854-021-05815-8

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  • DOI: https://doi.org/10.1007/s10854-021-05815-8

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