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Abstract <p>Co<sub>3</sub>O<sub>4</sub> nanoparticles (NPs) were efficiently synthesized through a hydrothermal approach, utilizing sodium hexametaphosphate (SHMP) as an anionic surfactant to aid in nanoparticle formation and dispersion. The crystallinity of the resulting NPs was examined through X-ray powder diffraction (XRD) techniques. The XRD analysis revealed distinct and intense diffraction peaks corresponding to a cubic crystal structure. To analyze the surface morphology and structural features of the synthesized nanoparticles, field emission scanning electron microscopy (FESEM) and transmission electron microscopy (TEM) were employed. The images acquired through SEM and TEM revealed a spherical like structure for the Co<sub>3</sub>O<sub>4</sub> samples. TEM analysis confirmed that the Co<sub>3</sub>O<sub>4</sub> nanoparticles synthesized in the presence of a surfactant had a uniform morphology with an average particle size of around 6 nm. The optical bandgap of the Co<sub>3</sub>O<sub>4</sub> NPs was assessed using UV diffuse reflectance spectroscopy, with the bandgap calculated via the Tauc relation. Additionally, the electrochemical charge storage capabilities of these NPs were evaluated through three-electrode electrochemical measurements. The electrochemical performance of the SHMP assisted Co<sub>3</sub>O<sub>4</sub> nanoparticles reached a maximum of specific capacitance upto 962 Fg<sup>–1</sup>.</p>

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Electrochemical Performance of Cobalt Oxide Nanoparticles Synthesized via Anionic Surfactant-assisted Hydrothermal Method

  • 期刊论文

  • 发表日期：

    2025年8月14日

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  • R. Gunaseelan,
  • S. Rajesh,
  • L. Guganathan,
  • S. Suthakaran,
  • A. Dinesh,
  • A. Mani,
  • Manikandan Ayyar,
  • V. Mohanavel,
  • Rajendra P. Patil,
  • Saravanan Sundaram,
  • S. Pravina Mary,
  • V. Karthikeyan,
  • M. Santhamoorthy

摘要

Abstract

Co3O4 nanoparticles (NPs) were efficiently synthesized through a hydrothermal approach, utilizing sodium hexametaphosphate (SHMP) as an anionic surfactant to aid in nanoparticle formation and dispersion. The crystallinity of the resulting NPs was examined through X-ray powder diffraction (XRD) techniques. The XRD analysis revealed distinct and intense diffraction peaks corresponding to a cubic crystal structure. To analyze the surface morphology and structural features of the synthesized nanoparticles, field emission scanning electron microscopy (FESEM) and transmission electron microscopy (TEM) were employed. The images acquired through SEM and TEM revealed a spherical like structure for the Co3O4 samples. TEM analysis confirmed that the Co3O4 nanoparticles synthesized in the presence of a surfactant had a uniform morphology with an average particle size of around 6 nm. The optical bandgap of the Co3O4 NPs was assessed using UV diffuse reflectance spectroscopy, with the bandgap calculated via the Tauc relation. Additionally, the electrochemical charge storage capabilities of these NPs were evaluated through three-electrode electrochemical measurements. The electrochemical performance of the SHMP assisted Co3O4 nanoparticles reached a maximum of specific capacitance upto 962 Fg–1.