A simple route to synthesis and characterization of CoAl2O4 nanocrystalline via combustion method using egg white (ovalbumine) as a new fuel

Single phase of CoAl2O4 nanocrystalline spinel has been synthesized first time successively by combustion method using extracted egg white (ovalbumine) as new fuel. The prepared samples were characterized using XRD, TGA, DSC, TEM, BET, IR, UV–Vis and CIE L*a*b* colorimetric method. The average particle sizes were in the range 10.45–26.58 nm and fine agglomerates in a way that specific surface area up to 188.55 m2 g−1 could be obtained.

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► Nanocrystalline CoAl2O4 spinel powders have been successively prepared by the auto-ignited gel combustion method.
► The particle size is effect on color of prepared sample.
► The best results were obtained by calcining the spinel CoAl2O4 phase up to 900 °C using egg white as fuel.