Original scientific paper
https://doi.org/10.5599/jese.1657
Gama-Fe2O3 silica-coated 2-(2-benzothiazolyl azo)-4-methoxyaniline for supercapacitive performance
Jinan Mohammed Mahmood
; Chemistry Department, College of Science, Diyala University, Iraq
Zaid H. Mahmoud
; Chemistry Department, College of Science, Diyala University, Iraq
Noor Sabah Al-Obaidi
; Chemistry Department, College of Science, Diyala University, Iraq
Ahmed M Rahima
; Chemistry Department, College of Science, Mustansiriyah University, Iraq
Abstract
Magnetic g-Fe2O3@SiO2 core-shell nanocomposite was prepared using Stöber method and functionalized firstly by isopropenyloxytrimethylsilane as a coupling agent to enter active acetylacetone on the surface of nanoparticles, and after that by the synthesized azo dye ligand, 2-(2-benzothiazolyl azo)-4-methoxyaniline. In such a way, g-Fe2O3@SiO2-azo dye hybrid nanocomposite was formed. The structure of the synthesized azo dye was evidenced by physical and chemical analysis using melting point, Fourier-transform infrared spectroscopy (FT-IR), CHNS elemental analysis, proton nuclear magnetic resonance (HNMR) and gas chromatography mass spectrometry (GC-MS). The magnetic properties, structure, element composition and morphology characterization of prepared materials (g-Fe2O3,
g-Fe2O3@SiO2, and g-Fe2O3@SiO2-azo dye) were investigated by vibrating sample magnetometer (VSM), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), transmission electron spectroscopy (TEM) and field electron scanning electron microscopy-energy dispersive X-ray-mapping techniques. The electrochemical performance of synthesized g-Fe2O3, g-Fe2O3@SiO2, and g-Fe2O3@SiO2-2-(2-benzothiazolyl azo)-4-methoxyaniline) electrodes were carried out using cyclic voltammetry (CV), galvanostatic charge-discharge (GCD) and electrochemical impedance spectroscopy (EIS). It was shown that the finally prepared g-Fe2O3@SiO2-2-(2-benzothiazolyl azo)-4-methoxyaniline) hybrid nanocomposite electrode possesses good storage charge capability of 580 F g-1 at 1 A g-1.
Keywords
Hybrid nanocomposite; maghemite nanoparticles; azo dye ligand; supercapacitor elec-trode; coatings
Hrčak ID:
305154
URI
Publication date:
28.6.2023.
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