Nanoparticles; sol-gel; pechini method; α-Fe2O3; tartaric; succinic and citric acids. Nanoparticles; sol-gel; pechini method; α-Fe2O3; tartaric; succinic and citric acids.
Adv. Mater. Lett., 2013, Current Issue, 4 (5), pp 347-353
Publication Date (Web): Feb 23, 2013
Copyright © IAAM-VBRI Press
AnchorUniform α-Fe2O3 nanoparticles have been prepared by sol gel method using three different carboxylic acids citric, tartaric and succinic acids as chelating agents. The structure and morphology of α-Fe2O3 samples were characterized using (TGA), (XRD), (TEM), (IR) and diffuse reflectance spectroscopy (DRS) techniques. The TEM images revealed that in all cases, the products consisted of 18–25 nm sized particles close to the average crystallite size calculated from XRD data by the Scherrer’s formula. Among the prepared samples, the sample that has the best thermal stability, the smallest particle size and the reddest color is that prepared in presence of tartaric acid. The prepared samples were evaluated as pigments according to the American Society for Testing and Materials (ASTM) standard methods for evaluation of pigments.
Nanoparticles, sol-gel, pechini method, &alpha,-Fe2O3, tartaric, succinic and citric acids.