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Published in:
27-08-2016
Auto-combustion preparation and characterization of CoAl2O4 nanoparticles with different morphologies and its photocatalyst application
Published in: Journal of Materials Science: Materials in Electronics | Issue 1/2017
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Abstract
Nanocrystalline cobalt aluminate (CoAl2O4) was prepared by auto-combustion method using aluminum nitrate and cobalt nitrate. Besides, amino acids such as glycine, alanine, and asparagine were used to investigate their effects on the morphology and particle size of CoAl2O4 nanoparticles. Amino acids play role as capping agent, reducing agent, and fuel in the synthesis CoAl2O4 nanoparticles. The as-obtained CoAl2O4 nanoparticles were analyzed by UV–vis diffuse reflectance spectroscopy, field emission scanning electron microscopy, energy dispersive X-ray microanalysis, and X-ray diffraction. According to the vibrating sample magnetometer (VSM) result, CoAl2O4 nanoparticles indicated a paramagnetic behavior at room temperature. Furthermore, the photocatalysis results reveal that the maximum decolorization of 76 % for methyl orange occurred with CoAl2O4 nanoparticles in 70 min under ultraviolet (UV) light irradiation.