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<p>The mesoporous iron-doped MCM-41 material was synthesized by adding iron species into the oil-template-derived MCM-41 framework through an impregnation&#xa0;method. The prepared Fe-MCM-41 had the surface area of 357.974 m<sup>2</sup>/g. with pore diameter of 3.81&#xa0;nm. The characterization of synthesized Fe-MCM-41 through powder x-ray diffraction, Fourier infrared, scanning electron microscope with energy dispersive spectroscopy revealed the entry of Fe-species without altering the MCM-41 framework. Optical energy bandgap was measured as 3.72&#xa0;eV using the result of UV–visible spectroscopy. Electrochemical performance was evaluated using cyclic voltammetry (CV) and galvanostatic charge/discharge (GCD) in a 6&#xa0;M KOH electrolyte within a potential window of -0.9—0.1&#xa0;V. The prepared electrode material exhibited 99% of retentivity after 3000 cycles. The synthesized Fe-MCM-41 demonstrated a high specific capacitance of 756.40 F g<sup>−1</sup> at 1.5 A g<sup>−1</sup>, indicating its potential as a supercapacitor electrode material. Also, Fe-MCM-41 showed effective adsorption of methylene blue dye, with a maximum adsorption efficiency of 93.64%. These results indicate the dual functionality of Fe-MCM-41 in energy storage and environmental remediation applications.</p> Graphical Abstract <p></p>

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Iron Doped MCM-41 for Efficient Methylene Blue Dye Adsorption and Advanced Supercapacitor Energy Storage

  • 期刊论文

  • 发表日期：

    2026年1月21日

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  • M. Balavinoth,
  • P. Sumithraj Premkumar,
  • G. Jenit Sharmila,
  • J. Shakina,
  • J. Ilavarasi Jeyamalar

摘要

The mesoporous iron-doped MCM-41 material was synthesized by adding iron species into the oil-template-derived MCM-41 framework through an impregnation method. The prepared Fe-MCM-41 had the surface area of 357.974 m2/g. with pore diameter of 3.81 nm. The characterization of synthesized Fe-MCM-41 through powder x-ray diffraction, Fourier infrared, scanning electron microscope with energy dispersive spectroscopy revealed the entry of Fe-species without altering the MCM-41 framework. Optical energy bandgap was measured as 3.72 eV using the result of UV–visible spectroscopy. Electrochemical performance was evaluated using cyclic voltammetry (CV) and galvanostatic charge/discharge (GCD) in a 6 M KOH electrolyte within a potential window of -0.9—0.1 V. The prepared electrode material exhibited 99% of retentivity after 3000 cycles. The synthesized Fe-MCM-41 demonstrated a high specific capacitance of 756.40 F g−1 at 1.5 A g−1, indicating its potential as a supercapacitor electrode material. Also, Fe-MCM-41 showed effective adsorption of methylene blue dye, with a maximum adsorption efficiency of 93.64%. These results indicate the dual functionality of Fe-MCM-41 in energy storage and environmental remediation applications.

Graphical Abstract