| Autor: |
Moradi SAH; Department of Physics, Faculty of Science, Malayer University, Malayer, Iran., Ghobadi N; Department of Physics, Faculty of Science, Malayer University, Malayer, Iran. |
| Abstrakt: |
Here, NiFe 2 O 4 , MnFe 2 O 4 , and CoFe 2 O 4 nanoferrites are prepared by coprecipitation synthesis technique from nickel, manganese, and cobalt chloride precursors. Synthesized nanoferrites are annealed by calcination process at 800°C for 2 h. To produce a novel anode electrode material for asymmetric supercapacitors (ASCs), the composite material of GO/NiFe 2 O 4 -MnFe 2 O 4 -CoFe 2 O 4 is fabricated. Physicochemical aspects of the synthesized nanoferrites are evaluated. X-ray diffraction, Fourier transform infrared spectroscopy, scanning electron microscopy, and x-ray photoelectron spectroscopy tests are conducted, respectively. The electrochemical activities are studied by cyclic voltammetry, glavanostatic charge-discharge, and electrochemical impedance spectroscopy (EIS) in 2 M KOH as the electrolyte. In three electrode system, the novel GO/NiFe 2 O 4 -MnFe 2 O 4 -CoFe 2 O 4 electrode displays a high specific capacity of 325 C g -1 and preserves about 99.9% of its initial specific capacity. The GO/NiFe 2 O 4 -MnFe 2 O 4 -CoFe 2 O 4 //GO ASCs device is assembled using GO/NiFe 2 O 4 -MnFe 2 O 4 -CoFe 2 O 4 , GO, and 2 M KOH solution as the positive electrode, negative electrode, and electrolyte, respectively. Significantly, the GO/NiFe 2 O 4 -MnFe 2 O 4 -CoFe 2 O 4 //GO ASCs represent an outstanding energy density of 50.5 W h kg -1 at power density of 2560 W kg -1 . Through the long-term charge discharge cycling tests, this ASC device illustrates about 93.7% capacity retention after 3000 cycles. Then, the present study provides the NiFe 2 O 4 -MnFe 2 O 4 -CoFe 2 O 4 composite nanoferrites as a novel favorable candidate for anode material. RESEARCH HIGHLIGHTS: Simple and green synthesis of magnetic NiCo 2 O 4 /NiO/rGO composite nanostructure using natural precursor. Fabricating and designing an efficient semiconductor for degradation ability. NiCo 2 O 4 /NiO/rGO nanocomposite with advanced photo elimination catalytic routine. The photocatalytic performance of NiCo 2 O 4 /NiO/rGO was surveyed for the degradation of various antibiotics below visible radiation. Efficiency was 92.9% to eliminate tetracycline. We developed a synergetic approach to prepare a novel active material composed of GO/ NiFe2O4-MnFe2O4-CoFe2O4 by a hybrid electrode material. Green synthesis method was accomplished to attain NiCo 2 O 4 /NiO/rGO nanocomposite with advanced photo elimination catalytic routine. The oxide nanobundles were prepared with a rapid and eco-friendly method. In order to investigation of the effect of natural precursor, morphology and shape of nanoproducts was compared. NiCo 2 O 4 /NiO/rGO nanobundles possess a suitable bandgap in the visible area.
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