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- Title
Ethanol sensor based on microrod-like La-doped barium stannate.
- Authors
Bhattacharya, Anish; Zhang, Yin; Wu, Haiyan; Chu, Xiangfeng; Dong, Yongping; Liang, Shiming; Xu, Jiaqiang; Chakraborty, Amit K.
- Abstract
Due to its importance in human health and environmental monitoring, ethanol sensing has generated large research interest across the globe. In this work, we report a simple co-precipitation method to synthesize La-doped BaSnO3 and evaluate its ethanol sensing properties. Electron microscopy and X-ray diffraction analyses revealed formation of crystalline BaSnO3 having rod-like shape, few microns in length and 1–2 µm in width. The optimal sensing performance was achieved when operated at 220 °C for 4 wt% La-doped BaSnO3 microrods for which a response as high as 48 was obtained against 100 ppm of ethanol exposure, whereas the undoped BaSnO3 exhibited its best performance (although much lower response) at 260 °C. Multiple characterization techniques revealed that the enhancement of the sensor performance by incorporation of La was due to changes in the physico-chemical properties like specific surface area, oxygen content and electronic bandgap of the BaSnO3. The high repeatability, high selectivity to ethanol, fast response and recovery times, and low detection limit of 0.01 ppm suggest good potential for the 4% La-doped BaSnO3 film as a low cost ethanol sensor.
- Subjects
BARIUM; ENVIRONMENTAL monitoring; X-ray microscopy; DETECTORS; DETECTION limit
- Publication
Journal of Materials Science: Materials in Electronics, 2020, Vol 31, Issue 20, p17461
- ISSN
0957-4522
- Publication type
Article
- DOI
10.1007/s10854-020-04302-w