期刊
IEEE SENSORS JOURNAL
卷 22, 期 1, 页码 25-32出版社
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/JSEN.2021.3127351
关键词
Sensors; Zinc oxide; II-VI semiconductor materials; Temperature sensors; X-ray scattering; Calcination; Metals; Butanone detection; high selective; ZnO sensor; first principles
资金
- National Natural Science Foundation of China [62033002, 61833006, 62071112, 61973058]
- Fundamental Research Funds for the Central Universities in China [N2004019, N2004028]
- 111 Project [B16009]
- Liaoning Revitalization Talents Program [XLYC1807198]
- Liaoning Province Natural Science Foundation [2020-KF-11-04]
- Hebei Natural Science Foundation [F2020501040]
A highly selective and low detection limit ZnO sensor was successfully prepared by hydrothermal method, and the sensor performance was optimized by adjusting the particle size of the materials. The response of the sensor to butanone was higher than other target gases, and the high selectivity was further explained through simulation calculations.
The butanone sensor based on metal oxide semiconductor (MOS) are anticipated with a high response and a low detection limit through a simple process. In order to solve the issue of insufficient sensing performance of a pure metal oxide, high selective ZnO sensor with ppb detection limit are successfully prepared by convenient hydrothermal method, moreover, the particle size of materials is adjusted by calcination temperature based on the Deby length for optimizing the sensor performance. All sensors are tested for response in the concentration range of 0.2 ppm to 100 ppm butanone. When the particle size is closer to 2 times the Debye length, the material exhibits a higher response to 100 ppm of butanone at the optimum operating temperature. In particular, the synthesized M-ZnO-400 sensor has a response 151 to 100 ppm butanone at 310 degrees C, with the detection limit of 200 ppb, the response time of 4.5 s, as well as the recovery time of 5 s. It is worth noting that response of the prepared sensor to butanone is at least 62 times higher than that of chlorobenzene, vinyl benzene, xylene, toluene, benzene, acetaldehyde and formaldehyde. In addition, the population analysis for the different bonds of the target gases are calculated by first principles simulation to further explain the high selectivity of butanone.
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