Sol-gel Synthesis of Nanoscaled Spinels using 1, 2-ethanediol as a Gelation Agent

In the present work sodium chromite (NaCr2O4) based pigment was synthesized using sol gel technique. From XRD analysis, it is clear that all samples manufactured by sol gel technique have spinel structure crystallization. Also chromites with a chromium concentration (max) shows black color and Na- substituted shows green color. The samples were annealed at different temperature from 600˚C to 700˚C. The obtained nano particles were characterized by other different techniques as well such as Scanning electron microscopy, Raman spectroscopy, Photoluminence and Energy dispersive spectroscopy. The particle size of parent compound is ranging from 4.4nm to 11nm determined from SEM. The tendency of particles to form the aggregates with the increasing annealing temperature has been observed. The optical characterization of the compound shows that the sol gel attained material is strongly persuasive sodium chromite.