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<p>This study presents the development of an efficient and low-cost photocatalyst for methylene blue (MB) degradation using magnetite (Fe<sub>3</sub>O<sub>4</sub>) derived from natural iron sand combined with graphene oxide (GO). The Fe<sub>3</sub>O<sub>4</sub> was synthesized via a co-precipitation method using iron sand from Glagah Beach, Indonesia, while the Fe<sub>3</sub>O<sub>4</sub>/GO composites were prepared through a sonochemical mixing process with varying GO content (0.050, 0.075, and 0.100&#xa0;g). The structural and optical properties were characterized by XRD, HR-TEM, UV–Vis, and SEM–EDX. The photocatalytic performance was evaluated under UV light for 150&#xa0;min, demonstrating that the composite with 0.100&#xa0;g GO achieved the highest MB degradation efficiency of 99.72%. This work demonstrates the potential of natural-resource-based Fe<sub>3</sub>O<sub>4</sub>/GO composites as sustainable photocatalysts for water treatment applications.</p>

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Synergistic effect of natural iron sand-based magnetite and graphene oxide in photocatalytic methylene blue degradation

  • 期刊论文

  • 发表日期：

    2025年5月24日

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  • Rita Prasetyowati,
  • Aura Novanti Utomo Putri,
  • Runny Indo Saputri,
  • Evan Fajri Mulia Harahap,
  • Muhammad Riswan,
  • Pinaka Elda Swatika,
  • Fika Fauzi,
  • Eri Widianto

摘要

This study presents the development of an efficient and low-cost photocatalyst for methylene blue (MB) degradation using magnetite (Fe3O4) derived from natural iron sand combined with graphene oxide (GO). The Fe3O4 was synthesized via a co-precipitation method using iron sand from Glagah Beach, Indonesia, while the Fe3O4/GO composites were prepared through a sonochemical mixing process with varying GO content (0.050, 0.075, and 0.100 g). The structural and optical properties were characterized by XRD, HR-TEM, UV–Vis, and SEM–EDX. The photocatalytic performance was evaluated under UV light for 150 min, demonstrating that the composite with 0.100 g GO achieved the highest MB degradation efficiency of 99.72%. This work demonstrates the potential of natural-resource-based Fe3O4/GO composites as sustainable photocatalysts for water treatment applications.