Abstract
In this paper, nickel ferrite (NiFe2O4) nanoparticles were synthesized from metallurgical wastes using co-precipitation method and demonstrated an improved liquefied petroleum gas (LPG) sensing properties. The morphology and magnetic properties of the nanoparticles were characterized. The nanoparticles were utilized to detect liquefied petroleum gas (LPG), and derive the mechanisms for the enhancement in the sensing properties. The sensing properties at LPG concentrations of 5000 ppm in air were validated as a function of operating temperature and the response-recovery time. High sensing response, speedy response-recovery time, and good reproducibility were achieved using NiFe2O4 nanoparticles as sensor. The gas sensing mechanism of NiFe2O4 is associated with the change in resistance of NiFe2O4 nanoparticles supported by the oxygen adsorption on the nanoparticles. This study proves the opportunity of emerging a prospective low-cost NiFe2O4 sensor derived from metallurgical wastes to be more effectual for LPG sensing.
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