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<p>The calcium nickel titanate nanocomposite was synthesized successfully using a straightforward solution combustion method and assessed as a multifunctional electrode material for applications in electrochemical sensing and Supercapacitive energy storage. X-ray diffraction (XRD) confirmed the creation of crystalline CaTiO<sub>3</sub>/NiO phases, with an average crystallite size of 28.4&#xa0;nm. Meanwhile, transmission electron microscopy (TEM) showed nearly spherical nanoparticles averaging around 32&#xa0;nm in size. UV–DRS analysis revealed a direct optical band gap of 3.53&#xa0;eV, affirming the semiconducting characteristics of the material. The modified carbon paste electrode (MCPE) demonstrated outstanding electrochemical performance in a 1&#xa0;M KCl electrolyte, achieving a high specific capacitance of 332&#xa0;F g<sup>− 1</sup> at a scan rate of 10 mV/s, along with commendable cycling stability over 1000 cycles. Electrochemical impedance spectroscopy (EIS) indicated a low charge-transfer resistance of approximately 48 Ω, suggesting efficient electron transfer and favorable electrochemical kinetics. Additionally, the electrode exhibited remarkable sensing capabilities for Brilliant Blue and Metanil Yellow, reaching low detection limits of 0.4 µM and 3.5 µM, respectively. These findings underscore the potential of the calcium–nickel titanate nanocomposite as a promising multifunctional material for integrated energy storage and electrochemical sensing applications.</p>

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Calcium Nickel Titanate Nanocomposite Based Electrochemical Sensor for Voltammetric Detection of Food Dyes

  • 期刊论文

  • 发表日期：

    2026年5月26日

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  • H. M. Deepa,
  • H. P. Nagaswarupa,
  • Ramachandra Naik,
  • Abdullah A. Al-Kahtani,
  • Burragoni Sravanthi Goud,
  • Jae Hong Kim

摘要

The calcium nickel titanate nanocomposite was synthesized successfully using a straightforward solution combustion method and assessed as a multifunctional electrode material for applications in electrochemical sensing and Supercapacitive energy storage. X-ray diffraction (XRD) confirmed the creation of crystalline CaTiO3/NiO phases, with an average crystallite size of 28.4 nm. Meanwhile, transmission electron microscopy (TEM) showed nearly spherical nanoparticles averaging around 32 nm in size. UV–DRS analysis revealed a direct optical band gap of 3.53 eV, affirming the semiconducting characteristics of the material. The modified carbon paste electrode (MCPE) demonstrated outstanding electrochemical performance in a 1 M KCl electrolyte, achieving a high specific capacitance of 332 F g− 1 at a scan rate of 10 mV/s, along with commendable cycling stability over 1000 cycles. Electrochemical impedance spectroscopy (EIS) indicated a low charge-transfer resistance of approximately 48 Ω, suggesting efficient electron transfer and favorable electrochemical kinetics. Additionally, the electrode exhibited remarkable sensing capabilities for Brilliant Blue and Metanil Yellow, reaching low detection limits of 0.4 µM and 3.5 µM, respectively. These findings underscore the potential of the calcium–nickel titanate nanocomposite as a promising multifunctional material for integrated energy storage and electrochemical sensing applications.