Hierarchically structured LaFeO3 with hollow core and porous shell as efficient sensing material for ethanol detection

Phan, T.T.N., Dinh, T.T.M., Nguyen, M.D., Li, D., Phan, C.N., Pham, T.K., Nguyen, C.T. and Pham, T.H. (2022) Hierarchically structured LaFeO3 with hollow core and porous shell as efficient sensing material for ethanol detection. Sensors and Actuators B: Chemical, 354 . Art. 131195.

Abstract

Hollow LaFeO3 (LFO-HS) was synthesized by a facile hydrothermal method with the use of cetyltrimethylammonium bromide. Its structural, morphological, microstructural and textual characterizations were performed using X-ray diffraction, scanning electron microscopy, transmission electron microscopy and nitrogen adsorption-desorption analysis. The gas-sensing performance of LFO-HS sensor was studied towards different gases, including ammonia (NH3), ethanol (C2H5OH), acetone (CH3COCH3), and liquefied petroleum gas (LPG). The LFO-HS sensor exhibited p-type gas sensing behavior and enhanced sensing performance towards ethanol gas as compared with bulk LaFeO3 sensor. A rapid, high, and stable response was seen at 300 °C. Meanwhile, a linear response and low limit of detection (1 ppb) to ethanol was observed. After the investigation on sensitivity to different reducing gases, our results revealed that the LFO-HS sensor exhibited good selectivity to ethanol and suggested it being a promising sensor candidate for future practical use in trace ethanol detection.

Item Type:	Journal Article
Publisher:	Elsevier B.V.
Copyright:	© 2021 Elsevier B.V.
URI:	http://researchrepository.murdoch.edu.au/id/eprint/63294

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