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<p>We report a cost-effective, single-step combustion synthesis of γ-Fe<sub>2</sub>O<sub>3</sub>/graphitic/graphene oxide (GO) hybrid nanocomposite. Comprehensive characterization using XRD, EDS, FESEM, TEM, XPS, Raman, FTIR, thermal analysis, and BET confirmed the material's structure and properties. Raman spectra exhibited D and G bands with an I<sub>D</sub>/I<sub>G</sub> ratio of 0.97, indicating defects in the carbon matrix. FTIR analysis identified a C–O stretching band at 1140&#xa0;cm⁻<sup>1</sup>, confirming the presence of GO. The nanocomposite displayed a type IV isotherm with a BET surface area of 50.24 m<sup>2</sup>/g, suitable for catalytic applications. Magnetic measurements revealed coercivities of ~85 Oe at 300&#xa0;K and ~690 Oe at 2&#xa0;K, characteristic of soft magnetic materials. Electrochemical studies indicated non-redox diffusion-controlled reactions with a charge transfer resistance of ~135 Ω. The photocatalytic methylene blue dye degradation efficiency γ-Fe<sub>2</sub>O<sub>3</sub>/graphitic/graphene oxide (GO) was attributed to structural defects within the composite.</p> Graphical abstract <p></p>

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One-step solution combustion synthesis of γ-Fe2O3/graphite/GO hybrid nanocomposite: Magnetic, photocatalytic, and electrochemical properties

  • 期刊论文

  • 发表日期：

    2025年9月9日

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  • S. J. Farhath Jahan,
  • Sajeev Damodarakurup,
  • Senoy Thomas

摘要

We report a cost-effective, single-step combustion synthesis of γ-Fe2O3/graphitic/graphene oxide (GO) hybrid nanocomposite. Comprehensive characterization using XRD, EDS, FESEM, TEM, XPS, Raman, FTIR, thermal analysis, and BET confirmed the material's structure and properties. Raman spectra exhibited D and G bands with an ID/IG ratio of 0.97, indicating defects in the carbon matrix. FTIR analysis identified a C–O stretching band at 1140 cm⁻1, confirming the presence of GO. The nanocomposite displayed a type IV isotherm with a BET surface area of 50.24 m2/g, suitable for catalytic applications. Magnetic measurements revealed coercivities of ~85 Oe at 300 K and ~690 Oe at 2 K, characteristic of soft magnetic materials. Electrochemical studies indicated non-redox diffusion-controlled reactions with a charge transfer resistance of ~135 Ω. The photocatalytic methylene blue dye degradation efficiency γ-Fe2O3/graphitic/graphene oxide (GO) was attributed to structural defects within the composite.

Graphical abstract