期刊
SENSORS AND ACTUATORS B-CHEMICAL
卷 340, 期 -, 页码 -出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.snb.2021.129944
关键词
In2O3-SnO2 nanocomposites; Gas-sensing performance; n-Butanol; Synergistic effect
资金
- Scientific Research Project of Tianjin Education Commission [2018KJ250]
- Research Funds for the Central Universities [3122017070]
- Experimental Technology Innovation Fund Project of Civil Aviation University of China [2020CXJJ33]
- National College Students' Innovation Entrepreneurial Training Project [202010059072]
- Tianjin Institute of industrial biology of Chinese Academy of Sciences
In2O3-SnO2 nanocomposites were synthesized using a hydrothermal co-precipitation method and calcination treatment, leading to improved dispersion and increased surface area of SnO2 nanomaterials with the doping of a small amount of In2O3. Gas sensors based on these nanocomposites showed enhanced gas response towards n-butanol gas with reduced operating temperature, possibly due to a synergistic effect between In2O3 and SnO2.
A series of In2O3-SnO2 nanocomposites were synthesized with a facile hydrothermal co-precipitation method and calcination after-treatment at 400 degrees C. The crystal phase structure, morphology, and elemental composition were characterized by X-ray powder diffraction and field emission scanning electron microscopy with energy dispersive spectroscopy. In2O3-SnO2 nanocomposite-based gas sensors were fabricated, and their potential applications were assessed by testing gas-sensing properties systematically. The results exhibited that a small amount of In2O3 dopant improved the dispersion and increased the specific surface area of SnO2 nanomaterials. Besides, the gas response towards n-butanol gas was promoted and the working temperature was decreased by doping In2O3. In particular, the 1.5 %In2O3-SnO2 nanocomposites-based sensor showed an excellent response of 76.5 towards 50 ppm n-butanol gas at 140 degrees C. The binding energies of the Sn 3d in nanocomposites varied with the changed doping dosage of In through XPS analysis. The enhanced n-butanol sensing performance of the fabricated In2O3-SnO2 sensors at low operating temperature may be due to a synergistic effect between In2O3 and SnO2.
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