Rapid Synthesis and Physiochemical Characterization of Aluminium-Oxide Nanoparticles via Citric Acid Facilated Auto Combustion Synthesis

Abstract

Introduction: In order to manufacture of Al₂O₃ nanoparticles for this study, we used the Sol-Gel approach.               The resulting NPs were then calcined at 1350°C for 3 hours. The phase stability and the crystal arrangement of the NPs were determined using X-ray diffraction analysis and this investigations demonstrate the formation of hexagonal structure (Space Group: R-3c) with the lattice constant a=b= 4.761 Å and c= 12.978Å, respectively. The thermal stability and the heat flow of Al₂O₃ nanoparticles were investigated through TG-DSC curve. The presence of deformed shape of the grains with unclear grain boundaries were observed from the SEM and cross-sectional SEM micrograph. The average grain size obtained through the SEM analysis and estimated to be 1.01 µm on the scale of 1 µm using Image J software, which was justified with the help of Histogram curve. The EDS results confirmed the existence of Al, O elements in alumina nanoparticles with Atomic (%) (32.48 % of Al, 67.52 %of O) and weight (%) (44.79 % of Al, 55.20 % of O) suggesting the purity of the synthesized NPs.