Parallel-solution blow spun Al-SnO2/F-SnO2 fibers as an efficient room temperature ethanol sensor
Abstract: In the last few years, the design of room-temperature gas sensors is in growing demand. This is because high operating temperatures increase power consumption and impose unnecessary risks when working with flammable gases. This article describes the parallel-spinning fabrication of Al–SnO2/F–SnO2 hybrid fibers using the Solution Blow Spinning (SBS) method for room-temperature ethanol sensing application. The structural influence of element doping and the chemical composition/elemental states were studied by X-ray diffraction (XRD), Raman spectroscopy and X-ray photoelectron spectroscopy (XPS). The 5 at% Al–SnO2/15 at% F–SnO2 composite-based sensor exhibited high sensitivity to ethanol (R = 3.0 at 100 ppm) at room temperature. This sensor also showed short response/recovery times, excellent selectivity, repeatability and long-term stability. More importantly, the sensor based on Al–SnO2/F–SnO2 composite displayed a sensing response 9 times higher than pure SnO2 fibers. These results indicate that the Al–SnO2/F–SnO2 fibers prepared in this work are promising and excellent room temperature sensing materials.
Author(s): Nascimento, E. P.; Araujo, R. N.; Firmino, H. C.; Mastelaro, V. R.; Loureiro, F. J. A.; Neves, G. A.; Medeiros, E. S.; Menezes, R. R.
Ceramics International
Published: 1 May 2022, Volume 48, Issue 9, Pages 13163-13174
DOI: https://doi.org/10.1016/j.ceramint.2022.01.193
CDMF
The CDMF, hosted at the Federal University of São Carlos (UFSCar), is one of the Research, Innovation and Dissemination Centers (RIDC) supported by the São Paulo State Research Support Foundation (Fapesp), and also receives investment from the National Council Scientific and Technological Development (CNPq), from the National Institute of Science and Technology of Materials in Nanotechnology (INCTMN).
