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<p>Light absorbing iron oxides and iron oxides/polymer composites were prepared and characterized. DSC, TG, XRD and SEM analysis, optical and FTIR spectroscopy were used for materials characterization. Nanolayered composite Fe<sub>x</sub>O<sub>y</sub> oxides particles were formed by the thermal treatment of FeO pigment at the temperatures up to 565&#xa0;°C in air atmosphere and were used as an inorganic filler in epoxy resin composites. Calcined pigment particles are consisted of different iron oxides (FeO/Fe<sub>3</sub>O<sub>4</sub>/γ-Fe<sub>2</sub>O<sub>3</sub>/α-Fe<sub>2</sub>O<sub>3</sub>) nanocrystals having size less than 40&#xa0;nm. The heat treatment of pigment leads to their oxidation and structural transformation but their sizes are not changed remarkably. Composite particles interact with organic dye (Chicago Sky Blue) molecules and adsorb them from aqueous solutions. The pigment particles demonstrate the photocatalytic decomposition of dye molecules in aqueous solutions under near UV (λ = 395&#xa0;nm) irradiation. The heat treatment of pigment particles accompanying the growth of content of Fe<sub>2</sub>O<sub>3</sub> in them increases the rate constant of photocatalytic dye decomposition of 50%. The addition of nanolayered Fe<sub>x</sub>O<sub>y</sub> pigment particles into epoxy matrix allows to obtain homogeneous composites. Fe<sub>x</sub>O<sub>y</sub>/epoxy composites demonstrate low (up to 5.5%) reflection on the interface with air in NIR spectral range (1000–1100&#xa0;nm). The thermal treatment at temperatures T &gt; 300&#xa0;°C leads to the decomposition of polymer matrix and to the significant growth of the light reflectivity. First found that Fe<sub>x</sub>O<sub>y</sub>/epoxy resin composites can be promising for their practical application as a cladding for laser systems based on YAG materials.</p>

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Light Absorbing FexOy Nanolayered Composite Pigments and Based of them Oxide/Polymer Hybrids for Laser Systems and Photocatalysis

  • 期刊论文

  • 发表日期：

    2026年4月16日

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  • D. A. Gavrilova,
  • D. V. Bulyga,
  • S. K. Evstropiev,
  • L. L. Khomutinnikova,
  • A. I. Kashurin

摘要

Light absorbing iron oxides and iron oxides/polymer composites were prepared and characterized. DSC, TG, XRD and SEM analysis, optical and FTIR spectroscopy were used for materials characterization. Nanolayered composite FexOy oxides particles were formed by the thermal treatment of FeO pigment at the temperatures up to 565 °C in air atmosphere and were used as an inorganic filler in epoxy resin composites. Calcined pigment particles are consisted of different iron oxides (FeO/Fe3O4/γ-Fe2O3/α-Fe2O3) nanocrystals having size less than 40 nm. The heat treatment of pigment leads to their oxidation and structural transformation but their sizes are not changed remarkably. Composite particles interact with organic dye (Chicago Sky Blue) molecules and adsorb them from aqueous solutions. The pigment particles demonstrate the photocatalytic decomposition of dye molecules in aqueous solutions under near UV (λ = 395 nm) irradiation. The heat treatment of pigment particles accompanying the growth of content of Fe2O3 in them increases the rate constant of photocatalytic dye decomposition of 50%. The addition of nanolayered FexOy pigment particles into epoxy matrix allows to obtain homogeneous composites. FexOy/epoxy composites demonstrate low (up to 5.5%) reflection on the interface with air in NIR spectral range (1000–1100 nm). The thermal treatment at temperatures T > 300 °C leads to the decomposition of polymer matrix and to the significant growth of the light reflectivity. First found that FexOy/epoxy resin composites can be promising for their practical application as a cladding for laser systems based on YAG materials.