NDLI: A high sensitive and low detection limit of formaldehyde gas sensor based on hierarchical flower-like CuO nanostructure fabricated by sol

Content Provider	Springer Nature Link
Author	Deng, Heng Li, Hai rong Wang, Fang Yuan, Chao xin Liu, Su Wang, Peng Xie, Long zhen Sun, Yong zhe Chang, Fang zhi
Copyright Year	2016
Abstract	The hierarchical flower-like CuO nanostructure was synthesized by a facile sol–gel method without template. Indirectly-heated sensors are fabricated by coating the sol–gel on ceramic tubes with signal electrodes and subsequent annealing. The obtained nanostructures are analyzed by X-ray diffraction and scanning electron microscopy. Their gas sensing performances were investigated. The results indicated that the sensor based on hierarchical flower-like CuO exhibited excellent sensing properties towards ethanol, formaldehyde, acetone and dimethylbenzene. The sensor based on the CuO exhibited the optimal gas sensing performance, giving a ppb-level detection limit and a high response (R$_{g}$/R$_{a}$) of 1.378 to 50 ppb formaldehyde at 250 °C. The response and recovery time of the flower-like CuO nanostructure sensor are 11.9 and 8.4 s, respectively. The significantly enhanced sensing properties to formaldehyde could be attributed to the changes in crystallite size and specific surface area. The results indicate that the hierarchical flower-like CuO nanostructure gas sensor can be a simple and useful platform for formaldehyde and other volatile organic compounds sensing application.
Starting Page	6766
Ending Page	6772
Page Count	7
File Format	PDF
ISSN	09574522
Journal	Journal of Materials Science: Materials in Electronics
Volume Number	27
Issue Number	7
e-ISSN	1573482X
Language	English
Publisher	Springer US
Publisher Date	2016-04-13
Publisher Place	New York
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Optical and Electronic Materials Characterization and Evaluation of Materials
Content Type	Text
Resource Type	Article
Subject	Atomic and Molecular Physics, and Optics Biomaterials Biophysics Condensed Matter Physics Electronic, Optical and Magnetic Materials Bioengineering Electrical and Electronic Engineering Biomedical Engineering

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