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.
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This project was funded by National Natural Science Foundation of China (Nos. 61671019 and 61971003).
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Bhattacharya, A., Zhang, Y., Wu, H. et al. Ethanol sensor based on microrod-like La-doped barium stannate. J Mater Sci: Mater Electron 31, 17461–17473 (2020). https://doi.org/10.1007/s10854-020-04302-w
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DOI: https://doi.org/10.1007/s10854-020-04302-w