ABSTRACT Aluminium oxide nanoflowers are synthesized using a green method involving a nontoxic aqueous extract from Foxtail Amaranthus , intended for use as electrodes in supercapacitors. The synthesized nanoflowers are characterized through various techniques, including UV–vis spectroscopy, x‐ray diffraction (XRD), Fourier‐transform infrared spectroscopy (FTIR), dynamic light scattering (DLS), Brunauer–Emmett–Teller (BET) and scanning electron microscopy (SEM). XRD analysis confirms the crystalline structure, which exhibit a corundum configuration. Scanning electron microscopy illustrates the flower‐like morphology of the aluminum oxide nanostructures. EDAX analysis confirms that aluminum and oxygen are the primary elements in the nanomaterial. A characteristic UV absorption peak for Al 2 O 3 is identified at 244 nm. The mesoporous (Type IV) Al 2 O 3 nanoparticles exhibited a specific surface area of 90 m 2 g −1 , as determined by BET analysis. The electrochemical properties and cycling performance of the supercapacitors utilizing Al 2 O 3 nanoparticles as electrode material are assessed through cyclic voltammetry, employing a 2 M KOH electrolyte. The Al 2 O 3 electrode demonstrates a specific capacitance of 41 F g − 1 at 1 A g − 1 indicate the possibility of material suitable for energy storage devices. The as synthesized nanoflowers were theoretically modelled using DFT. The optimized structure, theoretical band gap, charge transfer, noncovalent interactions, and reactivity sites are studied using quantum chemical calculations.
Raji et al. (Mon,) studied this question.