期刊
SENSORS AND ACTUATORS B-CHEMICAL
卷 238, 期 -, 页码 1102-1110出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.snb.2016.07.136
关键词
Solid-state synthesis; ZnO NPs; Microstructure; Gas sensor; Cl-2 sensor
资金
- National Science Foundation of China [21574086]
- Nanshan District Key Lab for Biopolymers and Safety Evaluation [KC2014ZDZJ0001A]
- Shenzhen Sci & Tech research grant [ZDSYS201507141105130]
- Shenzhen City Science and Technology Plan Project [JCYJ20140509172719311]
In the present study, rapid and highly efficient solid-state synthesis strategy has been successfully employed for the synthesis of zinc oxide nanoparticles (ZnO NPs). Herein, prepared ZnO NPs are characterized and used for the fabrication of highly sensitive, selective, and accountable gas sensors. Structural elucidation, surface composition, and morphological investigations of as-synthesized ZnO NPs respectively, are carried out using X-ray diffraction, Raman spectroscopy, energy dispersive X-ray spectroscopy, scanning electron microscopy, transmission electron microscopy, and selected area electron diffraction measurement techniques. The gas sensing properties of ZnO NPs studied at various operating temperatures and towards different oxidizing and reducing gases demonstrated the ability of ZnO to detect hazardous chlorine (Cl-2) gas (optimum @ 200 degrees C) with rapid response and recovery times. In addition, ZnO sensor film has detected the low 5 ppm concentration of Cl-2 with reasonable response of 199% with outstanding repeatability and stability in response. The variation of ZnO response with respect to different Cl-2 concentrations has systematically been investigated and explored. Finally, the plausible sensing mechanism of ZnO with Cl-2 gas molecules has been proposed using energy band model diagram. (C) 2016 Elsevier B.V. All rights reserved.
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