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Erschienen in:
01.09.2012
Enhanced ethanol sensing properties based on α-Fe2O3/In2O3 hollow microspheres
Erschienen in: Journal of Materials Science: Materials in Electronics | Ausgabe 9/2012
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Abstract
α-Fe2O3 and In2O3 hollow microspheres were synthesized via a simple green hydrothermal route, and the α-Fe2O3/In2O3 composite sample was prepared by mixing two products above together in a molar ratio of 1:1. Traditional ceramic tube structure gas sensors were fabricated and their gas sensing characteristics were obtained. The results indicated that the α-Fe2O3/In2O3 sample showed an improved sensitivity and selectivity to ethanol, compared with either α-Fe2O3 or In2O3 sample. Moreover, the sensitivities of both In2O3 and α-Fe2O3/In2O3 sensors were good linear with gas concentrations (1–500 ppm) to ethanol, and the response was found to remain stable for 150 days. In addition, the gas sensing mechanism of ethanol detection has been discussed.