Excellent ethanol sensor based on LaFeO3 modified with gold nanoparticles
| Autor: | Shuaipeng Wang, Jing Zhou, Fei Li, Jiangchun Li, Xiaoxin Gao, Zhentao Wu, Xiaobo Xiong |
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| Rok vydání: | 2021 |
| Předmět: |
Nanocomposite
Materials science Spectrometer Nanowire Condensed Matter Physics Atomic and Molecular Physics and Optics Electronic Optical and Magnetic Materials X-ray photoelectron spectroscopy Volume (thermodynamics) Chemical engineering Colloidal gold Surface modification Ethanol fuel Electrical and Electronic Engineering |
| Zdroj: | Journal of Materials Science: Materials in Electronics. 32:27587-27595 |
| ISSN: | 1573-482X 0957-4522 |
| DOI: | 10.1007/s10854-021-07133-5 |
| Popis: | 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. |
| Databáze: | OpenAIRE |
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