Al3+ doped Fe3O4 Nanoparticles: A Novel Preparation Method, Structural, Magnetic and Electrochemical Characterizations

doped magnetite (Fe3O4) nanoparticles were synthesized through one-pot facile electrochemical method. In this method, products were electro-deposited on a stainless steel (316L) cathode form an additive-free 0.005M Fe(NO3)(3)/FeCl2/AlCl3 aqueous electrolyte. The structural characterizations through X-ray diffraction (XRD), field emission electron microscopy (FE-SEM) and energy-dispersive X-ray (EDX) indicated that the deposited material has Al doped magnetite particles with average size of 15 nm. Magnetic analysis by VSM showed the super -paramagnetic nature of the prepared nanoparticles (Ms = 18.37 emu g(-1), Mr=0.13 emu g(-1), and H-ci=8.73 G). The charge storage capability evaluation of the prepared nanoparticles through cyclic voltammetry (CV) and galvanostat charge-discharge (GCD) confirmed that these materials are capable to deliver specific capacitances as high as 236.1 F g(-1) (at 0.2 A g(-1)) and 180.2 F g(-1) (at 1 A g(-1)), and capacity retentions of 95.6% and 89.4% after 2000 cycling at 0.2 and 1 A g(-1), respectively. The results confirmed that the applicability of the electro-synthesized nanoparticles in supercapacitors. Besides, the study shows a simple electrochemical method for preparation of metal doped magnetite nanoparticles.