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Excellent ethanol sensor based on LaFeO3 modified with gold nanoparticles

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Abstract

LaFeO3 modified with gold nanoparticles are synthesized by a simple wet chemical method. The structural and morphological characterizations of the Au-LaFeO3 nanocomposites are performed by various techniques such as X-ray diffraction, field emission scanning electron microscopy (FESEM) and X-ray photoelectron spectrometer (XPS). In this experiment, the ethanol sensing performance of Au-LaFeO3 nanocomposites was studied by changing the amount of HAuCl4. The experimental results indicate that the sensors prepared with different volume of HAuCl4 solution show excellent gas sensing properties to ethanol. Au functionalization immensely improved the gas-sensing abilities of the LaFeO3 nanowires. At the optimum working temperature, the highest sensitivity of Au-LaFeO3 gas sensor to 100 ppm ethanol gas is 44, which is 27 times higher than that of LaFeO3 sensor. In addition, Au-LaFeO3 gas sensor has high selectivity and strong anti-interference ability to ethanol gas. The sensing mechanism of the Au-LaFeO3 gas sensor is also discussed in detail.

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Acknowledgements

The project was supported by Jiangsu Key Laboratory of Advanced Catalytic Materials and Technology (Changzhou University, Project No. BM2012110), State Key Laboratory of Advanced Technology for Materials Synthesis and Processing (Wuhan University of Technology, Project No. 2021-KF-13) and Hubei Key Laboratory of the Forensic Science (Hubei University of Police, Project No. 2021KFKT00X).

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Authors and Affiliations

  1. Engineering Research Center of Nano-Geomaterials of Ministry of Education, Faculty of Materials Science and Chemistry, China University of Geosciences,388, Lumo Road, Wuhan, 430074, China

    Fei Li, Shuaipeng Wang & Zhentao Wu

  2. Jiangsu Key Laboratory of Advanced Catalytic Materials and Technology, Changzhou University, Changzhou, 213164, China

    Fei Li & Xiaoxin Gao

  3. State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan, 430070, China

    Fei Li & Jing Zhou

  4. Hubei Key Laboratory of the Forensic Science, Hubei University of Police, Wuhan, 430070, China

    Fei Li, Xiaobo Xiong & Jiangchun Li

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  1. Fei Li
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Li, F., Wang, S., Wu, Z. et al. Excellent ethanol sensor based on LaFeO3 modified with gold nanoparticles. J Mater Sci: Mater Electron 32, 27587–27595 (2021). https://doi.org/10.1007/s10854-021-07133-5

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  • DOI: https://doi.org/10.1007/s10854-021-07133-5

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