Orthorhombic CaFe<inf>2</inf>O<inf>4</inf>: A Promising P-type Gas Sensor
Sensors and Actuators B: Chemical 2016
Andris Šutka, Margus Kodu, Rainer Pärna, Rando Saar, Inna Juhņeviča, Raivo Jaaniso, Vambola Kisand

The search for p-type metal oxides with high gas response and stability is an important issue in gas sensor technology. In this work the p-type gas sensing properties of orthorhombic CaFe2O4 are demonstrated for the first time. CaFe2O4 nanopowders were successfully synthesized by the sol-gel auto-combustion method. The formation of orthorhombic CaFe2O4 compound was confirmed by X-ray diffraction, energy-dispersive X-ray spectroscopy, and X-ray photoelectron spectroscopy analyses. The synthesized CaFe2O4 compound showed p-type gas sensing behaviour and high gas response towards ethanol (Rg/Ra = 41.5) at a concentration of 100 ppm. Moreover, the CaFe2O4 material tested during the experiments showed good stability.

CaFe O 2 4 | Gas sensor | Sol-gel

Šutka, A., Kodu, M., Pärna, R., Saar, R., Juhņeviča, I., Jaaniso, R., Kisand, V. Orthorhombic CaFe2O4: A Promising P-type Gas Sensor. Sensors and Actuators B: Chemical, 2016, Vol.224, pp.260-265. ISSN 0925-4005. Available from: doi:10.1016/j.snb.2015.10.041

Publication language
English (en)
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