期刊
SENSORS AND ACTUATORS B-CHEMICAL
卷 363, 期 -, 页码 -出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.snb.2022.131839
关键词
Hollow microflower; High sensitivity; Ultra-low detection limit; Gas sensor
资金
- National Natural Science Foundation of China [61833006, 61831011]
- Jilin Province Science and Technology Development Plan Program [20200301010RQ]
- Project on Industrial Innovation Capability of Jilin Province [2020C048]
- Fundamental Research Funds for the Central Universities and Graduate Interdisciplinary Research Fund of Jilin University [10183201833]
In this study, Ru-doped Co3O4 flower-like hollow microspheres were successfully synthesized via a hydrothermal method, and their gas sensing performance was investigated. The Ru-doped Co3O4 sensor showed excellent acetone sensing performance with an ultra-low detection limit.
In this paper, we successfully prepared Ru-doped Co3O4 flower-like hollow microspheres by a simple hydrothermal method. The microstructure characterization results indicated the formation of well-organized microflowers with a size of 0.5-1 mu m, which were composed of nanosheets. The gas sensing performances of sensors by using the synthesized Ru-doped Co3O4 hollow microflowers as sensing material were investigated. The 1 at% Rudoped Co3O4 sensor showed the best acetone sensing performance and had a response 18.8-10 ppm acetone, which was almost 5.4 times that of pure Co3O4. Significantly, the sensor had an ultra-low detection limit, with a response value of 1.5-50 ppb acetone at 137.5 degrees C (30%RH). We propose a plausible mechanism for sensing performance improvement. Namely, the substitution of Ru4+ regulated the carrier concentration and induced the change of Co3O4 defect oxygen and chemisorbed oxygen.
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