Crystal Structure, Morphology, Optical and Super-Capacitor Properties of Srx: α-Sb2O4 Nanostructures

Document Type : Original Article

Authors

1 Department of Chemistry, Angadi Institute of Technology and Management, Savagaon Road, Belagavi-590008, Karnataka, India

2 Department of Chemistry, M S Ramaiah Institute of Technology, Bangalore-560054, Karnataka, India

3 Centre for Research in Medical Devices, National University of Ireland, Gaillimh, Galway- H91TK33, Ireland

Abstract

Mixed orthorhombic Srx doped α-Sb2O4 (x=2,4,8 and 10 wt. %) nanostructures (NS) were successfully synthesized by simple chemical precipitation method. Crystal structure, morphologies and microstructures of the as-synthesized Srx: α-Sb2O4 NS were characterized by X-ray diffraction (XRD) and scanning electron microscopy (SEM) techniques. XRD displayed that the NS were extensively crystalized and crystallite size increases with increase in the concentration of Sr2+ ions. SEM revealed spherical like morphologies and grain size varies between ~ 88 nm to 110 nm. Red shift in the optical absorptivity and increase in the optical band gap (Eg) displayed in UV-visible spectra as the Sr concentration increases in
α-Sb2O4 NS. In Fourier transform infrared spectra (FT-IR), intensity of the characteristic peak Sb-OH gradually increases as Sr2+ dopant concentration increases in NS. Electrochemical performances of Srx: α-Sb2O4 (x =10 wt. %) NS exhibited specific capacitance of 890 F/g at a current density of 1 A/g in 6 M KOH solution. Srx: α-Sb2O4 NS showed cyclic retention of 88.95 %, long term cyclic stability up to 1000 cycles and excellent repeatability and reproducibility. Srx:α-Sb2O4 NS act as a promising electrode material for super capacitor and can be used in high energy storage device applications.  

Keywords

Analytical and Bioanalytical Electrochemistry
Volume 14, Issue 1
January 2022
Pages 1-17

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History

  • Receive Date: 16 February 2021
  • Revise Date: 21 January 2022
  • Accept Date: 23 January 2022

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