Synthesis and Characterization of CoAl2O4 Nano Pigments by Polyol Method

Journal: Vol. 10, No.4, autumn 2017 - Article 5   Pages :  231 Until 238

Article Code:

M. Khajeh Aminian: Yazd University - Department of Physics
Tayebe Azizi: Yazd University - Physics
Reza Dehghan: Yazd University - Physics
Mohsen Hakimi: Yazd University - Physics

Article's abstract:

Blue nano pigments of CoAl2O4 were successfully prepared by polyol method. Two different groups of materials containing chloride and acetate compounds were used to synthesis the nano pigments. The nano pigments were calcinated at 1100°C. The CoAl2O4 nano pigments were characterized by X-ray diffraction XRD, scanning electron microscopy SEM, diffuse reflectance spectroscopy DRS, dynamic light scattering DLS, UV–Vis spectroscopy and CIE-Lab colorimetric measurement. Dynamic light scattering analysis confirmed the formation of nanoparticles in the suspensions. XRD data of CoAl2O4 powders displayed the samples, were synthesized by acetate compounds, have been crystallized just in CoAl2O4 spinel structure. While the samples, were synthesized by chloride compounds, have been crystallized in two phases of CoAl2O4 and Al2O3 crystal structures. The SEM images showed the average size of nano CoAl2O4 pigments is about 50 nm for all nano pigments while they have some agglomerations. The colorimetric parameters and DRS spectra confirmed the formation of blue pigments in all samples. The purity and intensity of color for the samples were different

Polyol,Nano pigment,CoAl2O4,Chloride,Acetate

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