Ethanol sensor based on microrod-like La-doped barium stannate
- PDF / 3,039,383 Bytes
- 13 Pages / 595.276 x 790.866 pts Page_size
- 83 Downloads / 217 Views
Ethanol sensor based on microrod-like La-doped barium stannate Anish Bhattacharya1, Yin Zhang1, Haiyan Wu1, Xiangfeng Chu1,*, Yongping Dong1, Shiming Liang2,*, Jiaqiang Xu3, and Amit K. Chakraborty4,* 1
School of Chemistry and Chemical Engineering, Anhui University of Technology, Ma’anshan 240003, Anhui, People’s Republic of China 2 School of Materials Science and Engineering, Linyi University, Linyi 276005, Shandong, People’s Republic of China 3 Department of Chemistry, College of Science, Shanghai University, Shanghai 200444, People’s Republic of China 4 Department of Physics, and Centre of Excellence in Advanced Materials, National Institute of Technology, Durgapur, West Bengal 713209, India
Received: 9 June 2020
ABSTRACT
Accepted: 19 August 2020
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 lm 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.
Ó
Springer Science+Business
Media, LLC, part of Springer Nature 2020
1 Introduction The sensing of volatile organic compounds (VOCs) is a major concern of modern-day research due to their significant role in our day-to-day life [1]. Ethanol is a VOC whose detection, especially at low
concentration, is useful in fermentation, food packaging, pharmaceuticals and traffic safety [1–8]. To identify drunk drivers, ethanol sensors are used by traffic police across the globe since the exhaled breath of humans who have consumed ethanol is expected to contain more ethanol than others [2]. Naturally,
Address correspondence to E-mail: [email protected]; [email protected]; [email protected]
https://doi.org/10.1007/s10854-020-04302-w
J Mater Sci: Mater Electron
many researchers have attempted to develop ethanol sensors using a variety of techniques and materials of which resistive sensors using metal oxide semiconductors (MOS)-based nano/microstructures and composites are perhaps the most widely explored [9–14]. In recent years, ABO3 type perovskite metal oxides (A and B represent two different me
Data Loading...
