MORPHOLOGICAL, OPTICAL AND CYCLIC VOLTAMMETRY STUDIES ON HAFNIUM OXIDE NANOPARTICLES

Abstract

Hafnium oxide nanoparticles were synthesized through the microwave-assisted chemical method. The as-prepared samples were calcined at 700 °C. The synthesized hafnium oxide nanoparticles were characterized by Scanning Electron Microscope with energy dispersive spectroscopy and UV-visible spectroscopy. The scanning electron micrographs of the materials showed uniform distribution of particles. Energy dispersive spectroscopy confirms the purity of the prepared sample. UV-Visible spectrum hafnium oxide nanoparticles showed the minimum absorption in the entire visible region. The energy bandgap of the synthesized hafnium oxide nanoparticles was determined through Tauc plot and found to be 5.65 eV. The cyclic voltagram of the hafnium oxide nanoparticles were studied through electrochemical impedance analyzer. The specific capacitance and energy density of hafnium oxide nanoparticles were determined.