Gama-Fe2O3 silica-coated 2-(2-benzothiazolyl azo)-4-methoxyaniline for supercapacitive performance

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, after that synthesized azo dye ligand, 2-(2-benzothiazolyl azo)-4-methoxyaniline. In such way, g-Fe2O3@SiO2-azo hybrid formed. The structure evidenced physical chemical analysis melting point, Fourier-transform infrared spectroscopy (FT-IR), CHNS elemental analysis, proton nuclear magnetic reso­nan­ce (HNMR) gas chromatography mass spectrometry (GC-MS). proper­ties, structure, element composition morphology characterization mate­rials (g-Fe2O3, g-Fe2O3@SiO2, dye) were investigated vib­rating sample magnetometer (VSM), X-ray diffraction (XRD), photoelectron (XPS), transmission electron (TEM) field scanning micro­scopy-energy dispersive X-ray-mapping techniques. electrochemical perfor­mance synthe­sized g-Fe2O3, g-Fe2O3@SiO2-2-(2-benzothiazolyl azo)-4-methoxy­aniline) electrodes carried out cyclic voltammetry (CV), galva­nostatic charge-discharge (GCD) impedance (EIS). It shown finally nano­composite electrode possesses good storage charge capability 580 F g-1 at 1 A g-1.