Fabrication and Characterization of Smart Chemical Sensor Based on CoAl0.7Fe1.3O4 Ferrite Nanoparticles

This paper reports the successful fabrication of phenyl hydrazine chemical sensor based on CoAl07Fe13O4 ferrite nanoparticles. The CoAl07Fe13O4 ferrite nanoparticles were synthesized by simple and facile co-precipitation method and characterized in terms of their morphological, structural, compositional and electrical properties. The detailed characterizations confirmed that the prepared ferrite nanoparticles are grown in nanostructure, possessing CoAl07Fe13O4 composition and spinel structure of cubic phase. The fabricated phenyl hydrazine chemical sensor based on CoAl07Fe13O4 nanoparticles exhibited a high and reproducible sensitivity of ∼32342 Am M −1 cm −2 with the low experimental detection limit of 0.625 mM in a short response time of ∼100 s. The fabricated sensor shows a linear dynamic range from 0.625 mM to 10 mM. This presented work demonstrates that simply prepared CoAl07Fe13O4 ferrite nanoparticles are efficient electron mediators for the fabrication of robust and reliable chemical sensors for the detection of hazardous chemicals.