Journal
SENSORS AND ACTUATORS B-CHEMICAL
Volume 204, Issue -, Pages 224-230Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.snb.2014.07.083
Keywords
WO3; Hierarchical nanostructure; Flower-like; NO2 sensor
Funding
- Application and Basic Research of Jilin Province [20130102010JC]
- National Nature Science Foundation of China [61304242, 61327804, 61134010, 61377058, 61374218]
- Program for Chang Jiang Scholars and Innovative Research Team in University [IRT13018]
- 863 High Technology Project [2013AA030902, 2014AA06A505]
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Flower-like WO3 composed of nanosheets were successfully synthesized by calcining the acid-treated hydrothermal precursor. Field emission scanning electron microscopy and transmission electron microscopy results reveal that the flower-like WO3 are assembled by a number of irregular-shaped nanosheets, which are cross-linked in the interior of the microflower. A possible formation mechanism is proposed on the basis of the results of time-dependent experiments. Moreover, the gas sensing properties of the obtained flower-like nanostructured WO3 were investigated. It is found that the sensor based on the flower-like WO3 nanostructure exhibits good selectivity and high response to NO2, and the detection limit is about 2 ppb. (C) 2014 Elsevier B.V All rights reserved.
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