sensor array

electrochemical sensing

gas sensors

sensing electrode

metal oxide

sensing properties

gas sensor

sensing performance

Optik

Historically, production of high-performance gas sensing materials has promised to satisfy the worldwide research interests with the increasingly enhanced gas sensor devices. In this paper we are adopting a facile hydrothermal strategy to prepare the ternary FeCo2O4/graphene hybrid nanocomposites. The spinal phase of FeCo2O4 with spherical shaped morphology was obtained through XRD, SEM and TEM images which confirms. In addition, an average particle size within the range of 30−40 nm was observed for the individual spherical shaped morphology. The Raman and XPS studies also explore the vibration modes and chemical composition of the FeCo2O4/graphene composites. The BET surface area and BJH pore size of FeCo2O4/graphene composites is estimated to be 93.2 m2/g and 19.45 nm, respectively. Such high surface area will provide the active path to gas molecules which will increase the efficiency of gas sensing. Measurement of ethanol and acetone gas sensing using clad altered fiber optic sensors and sensitivities for ethanol and acetone gases are 22 and 43 counts/ppm, respectively. Also discussed is the proposed gas sensing mechanism.

High performance ethanol and acetone gas sensing behavior of FeCo2O4/graphene hybrid sensors prepared by facile hydrothermal route