期刊
SENSORS AND ACTUATORS B-CHEMICAL
卷 362, 期 -, 页码 -出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.snb.2022.131803
关键词
Cu2O-CuO microflowers; NO2 sensor; Fast response-recovery time; P-type semiconductor metal oxides; Gas sensor
资金
- National Nature Science Foundation of China [61833006, 61831011, 62101209]
- Jilin Province Sci-ence 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]
Three-dimensional hierarchical Cu2O-CuO microflowers assembled by nanorods were synthesized through an environmentally friendly hydrothermal route. The Cu2O-CuO microflowers-2 sensor exhibits excellent selectivity, repeatability, and long-term stability to NO2, with fast response and recovery time, even under high humidity conditions. Such superior sensing properties can be attributed to its unique structural advantages, more surface adsorbed oxygen, and the synergistic influence between the two-phase coexistence.
Three-dimensional (3D) hierarchical Cu2O-CuO microflowers assembled by nanorods were successfully obtained through an environmentally friendly hydrothermal route. Compared with other gases, the Cu2O-CuO microflowers-2 sensor had excellent selectivity, repeatability and long-term stability to NO2 at 187 ?. Moreover, during dynamic gas sensing measurement, the Cu2O-CuO microflowers-2 sensor showed the highest gas sensitivity (5-100 ppb), fast response time (35 s) and recovery time (47 s) to NO2, even under relatively high humidity. Significantly, at the optimal working temperature, the detection limit of the sensor was 5 ppb. The excellent sensing properties can be attributed to its unique structural advantages, more surface adsorbed oxygen, and the synergistic influence between the two-phase coexistence.
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