期刊
APPLIED SURFACE SCIENCE
卷 434, 期 -, 页码 1048-1054出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.apsusc.2017.11.047
关键词
Fast response/recovery; CO gas sensor; 3D-RGO; ZnO nanoparticles; MEMS technology
类别
资金
- Vietnam National Foundation for Science and Technology Development (NAFOSTED) [103.02-2014.47]
Zinc oxide (ZnO) nanoparticles loaded onto 3D reduced graphene oxide (3D-RGO) for carbon monoxide (CO) sensing were synthesized using hydrothermal method. The highly porous ZnO/3D-RGO configuration was stable without collapsing and was deposited on the micro-heater of the CO gas sensor. The resulting CO gas sensor displayed high sensitivity, fast response/recovery, and good linearity. The sensor achieved a response value of 85.2% for 1000 ppm CO at a working temperature of 200 degrees C. The response and recovery times of the sensor were 7 and 9 s for 1000 ppm CO at 200 degrees C. Similarly, the response value, response time, and recovery time of the sensor at room temperature were 27.5%, 14 s, and 15 s, respectively. The sensor demonstrated a distinct response to various CO concentrations in the range of 1-1000 ppm and good selectivity toward CO gas. In addition, the sensor exhibited good repeatability in multi-cycle and long-term stability. (C) 2017 Elsevier B.V. All rights reserved.
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