Abstract
The interlocked cubes of hausmannite Mn 3O 4 thin films were synthesized by simple, inexpensive, and low temperature chemical route from urea containing bath. These films were characterized by using X-ray diffraction (XRD), field emission scanning electron microscope (FE-SEM), Fourier transform infrared spectra (FT-IR), optical absorption and wettability test. From the XRD patterns, polycrystalline nature of the hausmannite Mn 3O 4 films has been confirmed. Scanning electron micrographs revealed the development of three dimensional growths of interlocked cubes of Mn 3O 4 material. FT-IR spectrum bands confirmed the formation of Mn 3O 4 compound. The Mn 3O 4 film showed a direct optical band gap with energy 2.5 eV and hydrophilicity with water contact angle of 60°. Mn 3O 4 film when used in supercapacitor exhibited specific capacitance of 193 F g −1 in 1 M Na 2SO 4 electrolyte.
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