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<p>In this study, MgFe<sub>2</sub>O<sub>4</sub>/BiOBr nanocomposites with varying BiOBr content were synthesized via a facile sonochemical-assisted precipitation method. Comprehensive characterization using XRD, FTIR, FESEM, EDX, BET, UV–Vis DRS, PL, and VSM techniques confirmed the formation of well-structured heterojunctions with enhanced light absorption, surface area, and magnetic recoverability. Among the prepared composites, the 30% BiOBr-loaded sample exhibited the highest photocatalytic activity, achieving 98.7% degradation of erythrosine under UV–visible irradiation within 90&#xa0;min. The catalyst also retained 70.3% efficiency after five consecutive cycles, demonstrating excellent stability and reusability. Scavenger experiments identified superoxide radicals (•O₂⁻) as the dominant reactive species, and a charge transfer mechanism was proposed based on band structure alignment. XRD and FTIR analyses before and after reuse confirmed structural stability. These findings suggest that MgFe<sub>2</sub>O<sub>4</sub>/BiOBr nanocomposites are promising candidates for light-activated environmental remediation and fluorescence-based applications where photogenerated species play a crucial role.</p>

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Optical and Photocatalytic Behavior of Sonochemically Synthesized MgFe2O4/BiOBr Nanocomposites for Light-Induced Degradation of Organic Dyes

  • 期刊论文

  • 发表日期：

    2025年9月1日

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  • Rusul A. Ghazi,
  • Mushtaq Ali Hussein,
  • Ali Abbasi,
  • Haneen Majed Saheb,
  • Shaymaa Awad Kadhim,
  • Hossein Khojasteh,
  • Masoomeh Sadat Fini,
  • Kamran Heydaryan

摘要

In this study, MgFe2O4/BiOBr nanocomposites with varying BiOBr content were synthesized via a facile sonochemical-assisted precipitation method. Comprehensive characterization using XRD, FTIR, FESEM, EDX, BET, UV–Vis DRS, PL, and VSM techniques confirmed the formation of well-structured heterojunctions with enhanced light absorption, surface area, and magnetic recoverability. Among the prepared composites, the 30% BiOBr-loaded sample exhibited the highest photocatalytic activity, achieving 98.7% degradation of erythrosine under UV–visible irradiation within 90 min. The catalyst also retained 70.3% efficiency after five consecutive cycles, demonstrating excellent stability and reusability. Scavenger experiments identified superoxide radicals (•O₂⁻) as the dominant reactive species, and a charge transfer mechanism was proposed based on band structure alignment. XRD and FTIR analyses before and after reuse confirmed structural stability. These findings suggest that MgFe2O4/BiOBr nanocomposites are promising candidates for light-activated environmental remediation and fluorescence-based applications where photogenerated species play a crucial role.