Fabrication of magnetic cobalt-nickel ferrite nanoparticles for the adsorption of methyl blue in aqueous solutions

Abstract An innovative method of combustion–calcination a nitrate–ethanol solution to produce magnetic Co 0.5 Ni Fe 2 O 4 nanoparticles was developed. The calcination temperature and the volume ethanol were two pivotal elements that determine properties in this study. When used increased from 20 ml 40 ml, crystallinity increased; further increase decreased crystallinity. smallest nanoparticle obtained using ethanol. As 400 °C 700 °C, saturation magnetization 12.8 emu g −1 30.8 . fabricated at study removal methyl blue (MB) by adsorption. Experimental data revealed adsorption best described pseudo-second kinetics. isotherm applied Temkin model, which indicated presence single multilayer associative mechanism MB on nanoparticles. effect pH recycling measured. At values ≥5, high. After eight cycles use recycling, relative rate 75% initial value.