Abstract
The influence of processing parameters on the physicochemical properties of hematite alpha-Fe2O3 nanostructures was investigated. X-ray diffraction results revealed the hematite phase rhombohedral structure. Scanning electron microscope results explored nanospheres, nanohexagonal platelets, nanoellipsoids, distorted nanocubes, and interconnected platelets nanostructures. Rhombohedral single-phase hematite was confirmed through five Raman active modes. 2P (3/2) (1) -> 2P (1/2) transition in photoluminescence spectra and Fourier-transform infrared spectroscopy band observed at similar to 555 cm(-1) revealed the hematite formation. The highest specific capacitance value of 151.09 F/g for scan rate of 10 mV/s was obtained for the hydrothermal-assisted product using an Fe(NO3)(2)center dot 9H(2)O precursor in KOH electrolyte solutions.