Spinal ferrites are having important electronic materials because of their electrical and magnetic properties. MgFe2O4 gas sensors have important parameters such as phase formation, crystallite size, particle size, grain size, surface area etc. The present work provides comprehensive study of the mesoporous Mg(x)Fe(x-1)2O4 nanoparticles which were synthesized via sol-gel auto-combustion method. The main objective of the current research is to study the influence by increasing the concentration of ferrite with magnesium in nanostructure Mg(x)Fe(x-1)2O4 (X=0.1, 0.2, 0.3, 0.4, 0.5, 0.6, 0.7, 0.8 and 0.9); and investigation when exposed to liquid petroleum gas (LPG). The prepared Mg(x)Fe(x-1)2O4 were characterized using X-ray diffraction (XRD), scanning electron microscope (SEM), UV-visible spectroscopy; thermal analysis was done by TG/DTA, and particle size were calculated by using (Particle Size Analyser) PSA analysis. XRD revealed the formation of Mg(x)Fe(x-1)2O4 cubic structure for the sample with Mg-Fe equal ratio (x=0.5). The crystallite size estimated using Scherer formula is in the range of 12–24 nm. SEM images illustrate the porous nature characteristic of the obtained Mg(x)Fe(x-1)2O4. UV-visible spectra show noticeable peaks of magnesium ferrite. A nanostructured Mg(x)Fe(x-1)2O4 (x=0.1, 0.5 and 0.9) film deposited by spin coating technique, has been studied for sensing performance towards LPG at 500 ppm by different operating temperatures.Keywords: MgxFe(x-1)2O4 (x=0.1 to 0.9) nanoparticles, sol-gel auto-combustion, XRD, TG/DTA, LPG sensing
