Journal
SENSORS AND ACTUATORS B-CHEMICAL
Volume 256, Issue -, Pages 479-487Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.snb.2017.10.064
Keywords
Hollow nanostructure; Double shells; Hybrid materials; Gas sensor; High performance
Funding
- Postdoctoral Science Foundation of China [2015M571361]
- Natural Science Foundation Committee (NSFC) [51502110, 61673191]
- Central Universities Basic Scientific Research
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The sensing layer composited from the inorganic particles, organic materials, polymers could be regarded as an important and functional component used in electronic devices, such as chemical sensor. Furthermore, it is very important for these materials to own hierarchical and porous structures leading to a large effective specific surface area. Among these, hybrid materials with yolk double-shelled architecture can further realize the required surface chemical reactions. However, it is rarely reported in gas sensors. Herein, a novel SnO2-TiO2 hollow nanostructure consisting of double shells was successfully designed and synthesized. Due to the special multi-shelled structure and abundant hetero-interface, the sensing layer based on SnO2-TiO2 realizes a rapid response rate within 1.7 s to ethanol gas and alluring reproducibility (15 days), which are superior over those for compact structure with similar sensors. The results indicated that the SnO2-TiO2 yolk double-shelled microsphere have the huge potential for designing high performance practical ethanol devices in environmental monitoring and drunk driving. (C) 2017 Elsevier B.V. All rights reserved.
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