期刊
JOURNAL OF ALLOYS AND COMPOUNDS
卷 877, 期 -, 页码 -出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2021.160189
关键词
Heterostructure; NiO; ZnO; Nanowires; Ethanol sensing; Gas sensing
资金
- National Natural Science Foundation of China [51674067, 51422402]
- Fundamental Research Funds for the Central Universities [N180102032, N180106002, N180408018]
- Liaoning Revitalization Talents Program [XLYC1807160]
- Open Foundation of State Environmental Protection Key Laboratory of Mineral Metallurgical Resources Utilization and Pollution Control [HB201902]
- U.S. National Science Foundation [1903188]
- China Scholarship Council (CSC)
- Div Of Electrical, Commun & Cyber Sys
- Directorate For Engineering [1903188] Funding Source: National Science Foundation
In this study, NiO/ZnO heterostructured nanowires were synthesized using a two-step liquid phase route, and their gas sensing characteristics were investigated. The sensors showed high sensitivity and stability at the optimum operating temperature of 300 degrees C.
In this study, we report on the synthesis of the NiO/ZnO heterostructured nanowires by a facile two-step liquid phase route and their gas sensing characteristics employing Au interdigitated electrodes integrated on a miniature ceramic heater. Microstructural characterizations indicate that flocculent NiO particles are uniformly assembled on the outer surfaces of the single-crystalline ZnO nanowires, with diameters around 50 nm and lengths ranging from 500 nm to several mu m. The gas sensing investigation indicates that the sensors based on NiO/ZnO heterostructured nanowires exhibit high sensitivity towards ethanol, good reversibility, reproducibility, stability, robustness towards humidity, and fast response/recovery rates at the determined optimum operating temperature of 300 degrees C. Interestingly, the sensor shows higher ethanol response but longer recovery time in N-2 compared with those in air. An ethanol sensing mechanism is proposed to explain the experimental results. (C) 2021 Elsevier B.V. All rights reserved.
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