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<p>Recently, nanoparticles, specifically LiCaO and SiO<sub>2</sub>, have gained significant attention in research and development due to their exceptional stability and electrochemical properties. This study focuses on the successful synthesis of chitosan-SiO2-LiCaO nanocomposites to explore the outcome of Flumox on their microstructure by evaluating their sensing activity. In this process, SiO<sub>2</sub> served as a polymerizing and stabilizing agent. The resulting nanocomposites were examined using X-ray Diffraction (XRD), Scanning Electron Microscopy (SEM), Energy-Dispersive X-Ray Analysis (EDX), UV absorbance, and electrochemical methods. The absorbance study exposed two peaks at 239&#xa0;nm and 283&#xa0;nm that increased with the concentration of Flumox. Additionally, the electrochemical characteristics were examined using Electrochemical Impedance Spectroscopy (EIS) and Cyclic Voltammetry (CV) techniques. The results confirmed significant improvements in the electrocatalytic properties, along with improved and immediate electron transfer enabled by the modified surfaces. Furthermore, the synthesized Flumox-SiO<sub>2</sub>@Chitosan/LiCaO nanoparticles were utilized for peroxide nano-enzymatic sensor with a linear range of 0.1–1000 µM and a lower detection limit of 0.05 µM, showing the promising applications of these synthesized materials in sensor.</p>

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Impact of SiO2@Flumox Doping on the Microstructure and Electrochemical Properties of Chitosan-LiCaO Nanocomposites for Non-Enzymatic Hydroperoxide Sensors

  • 期刊论文

  • 发表日期：

    2025年12月16日

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  • Ali B. Abou Hammad,
  • Hend S. Magar,
  • Amany M. El Nahrawy

摘要

Recently, nanoparticles, specifically LiCaO and SiO2, have gained significant attention in research and development due to their exceptional stability and electrochemical properties. This study focuses on the successful synthesis of chitosan-SiO2-LiCaO nanocomposites to explore the outcome of Flumox on their microstructure by evaluating their sensing activity. In this process, SiO2 served as a polymerizing and stabilizing agent. The resulting nanocomposites were examined using X-ray Diffraction (XRD), Scanning Electron Microscopy (SEM), Energy-Dispersive X-Ray Analysis (EDX), UV absorbance, and electrochemical methods. The absorbance study exposed two peaks at 239 nm and 283 nm that increased with the concentration of Flumox. Additionally, the electrochemical characteristics were examined using Electrochemical Impedance Spectroscopy (EIS) and Cyclic Voltammetry (CV) techniques. The results confirmed significant improvements in the electrocatalytic properties, along with improved and immediate electron transfer enabled by the modified surfaces. Furthermore, the synthesized Flumox-SiO2@Chitosan/LiCaO nanoparticles were utilized for peroxide nano-enzymatic sensor with a linear range of 0.1–1000 µM and a lower detection limit of 0.05 µM, showing the promising applications of these synthesized materials in sensor.