期刊
SENSORS AND ACTUATORS B-CHEMICAL
卷 260, 期 -, 页码 33-41出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.snb.2017.12.114
关键词
Gas sensor; Acetone; UV light; Diabetic
资金
- National Natural Science Foundation of China [51772174, 51472145, 51272133]
- Shandong Natural Science Foundation [ZR2013EMM016]
3 wt% Pd-doped SmCoxFe1-xO3 nanocrystalline powders were prepared by the sol-gel method and annealed at 750 degrees C. The sensing response of Pd: SmCo0.1Fe0.9O3 was measured to be 1.62, 1.85, 2.21, 2.59, 3.69, 8.48, and 13.86 for 0.01, 0.02, 0.05, 0.1, 0.2, 0.5 and 1 ppm acetone gas, respectively, at an optimal operating temperature of 220 degrees C. The response and recovery times following exposure to 0.5 ppm acetone gas were 32 s and 13 s, respectively. To decrease the optimal operating temperature, UV light illumination at a wavelength of 365 nm was introduced. Under the UV light, the response showed a large improvement to 1.98, 2.53, 3.68, 5.03, 7.68, 10.31, and 15.85 for the same acetone gas concentrations, respectively, at an optimal operating temperature of 160 degrees C. Pd:SmCoxFe1-xO3 can be used to distinguish between healthy individuals and possible diabetic patients. Exhaled breath from four volunteers was detected under UV-light illumination. The resulting data show that the exhaled breath from diabetics contained more than 1 ppm acetone gas, while approximately 0.2 ppm acetone gas was detected in the exhaled breath from healthy individuals. (C) 2017 Published by Elsevier B.V.
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