期刊
JOURNAL OF ELECTRONIC MATERIALS
卷 46, 期 6, 页码 3309-3316出版社
SPRINGER
DOI: 10.1007/s11664-017-5283-5
关键词
WO3/Fe2O3; nanocomposite; gas sensor; hydrothermal process
资金
- Vietnam National Foundation for Science and Technology Development (NAFOSTED) [103.02-2015.18]
WO3 nanorods (NRs) and alpha-Fe2O3 NRs were fabricated by hydrothermal treatment. Composites of these materials were created by mixing with ratios of 1:2, 1:1 and 2:1 in weight. Morphology, structure and composition characteristics of the WO3/Fe2O3 NRs composites were characterized by scanning electron microscopy, x-ray diffraction and energy dispersive x-ray spectroscopy analyses. The results of sensing measurements indicated that the sensor based on WO3:Fe2O3 with the ratio of 2:1 exhibited fairly good sensitivity toward NH3 at 300A degrees C and the sensor based on WO3:Fe2O3 with the ratio of 1:1 can be used as a NH3 sensor with an operating temperature of 350A degrees C. Selectivity and response-recovery times are suitable for practical applications. Finally, the mechanism for the improvement in the gas-sensing property was discussed.
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