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<p>In this study, porous MoS<sub>2</sub> nanoflowers (NFs) were synthesized via a facile hydrothermal approach and evaluated for their photocatalytic activity toward the degradation of methylene blue (MB) under simulated sunlight. The as-prepared MoS<sub>2</sub> NFs exhibit a hierarchical structure composed of ultrathin nanosheets with abundant surface area and active edge sites, facilitating efficient light absorption and charge separation. Photocatalytic experiments revealed a high degradation efficiency of 98.30% in the first cycle and excellent reusability, retaining 93.30% efficiency after three cycles. Radical scavenging tests identified superoxide radicals (O<sub>2</sub><sup>·−</sup>) as the dominant reactive species involved in the degradation mechanism, supported by contributions from hydroxyl radicals (<sup>·</sup>OH) and photogenerated holes (h<sup>+</sup>). The enhanced performance is attributed to the high crystallinity, large surface-to-volume ratio, and improved charge carrier dynamics enabled by the porous nanoflower architecture. These results highlight the potential of MoS<sub>2</sub> nanostructures as efficient and stable photocatalysts for practical wastewater treatment applications under solar irradiation.</p>

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MoS2 flower-like architecture with enhanced photocatalytic performance for degradation of organic dyes under sunlight simulation

  • 期刊论文

  • 发表日期：

    2025年10月11日

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  • Minh Thi Pham,
  • Hanh Hong Nguyen,
  • Quan Manh Ly,
  • Duy Van Lai,
  • Hoan Thi Lai,
  • Thuan Nguyen Dao,
  • Duong Duc La,
  • Phuong Minh Nguyen,
  • Hoai Phuong Nguyen Thi

摘要

In this study, porous MoS2 nanoflowers (NFs) were synthesized via a facile hydrothermal approach and evaluated for their photocatalytic activity toward the degradation of methylene blue (MB) under simulated sunlight. The as-prepared MoS2 NFs exhibit a hierarchical structure composed of ultrathin nanosheets with abundant surface area and active edge sites, facilitating efficient light absorption and charge separation. Photocatalytic experiments revealed a high degradation efficiency of 98.30% in the first cycle and excellent reusability, retaining 93.30% efficiency after three cycles. Radical scavenging tests identified superoxide radicals (O2·−) as the dominant reactive species involved in the degradation mechanism, supported by contributions from hydroxyl radicals (·OH) and photogenerated holes (h+). The enhanced performance is attributed to the high crystallinity, large surface-to-volume ratio, and improved charge carrier dynamics enabled by the porous nanoflower architecture. These results highlight the potential of MoS2 nanostructures as efficient and stable photocatalysts for practical wastewater treatment applications under solar irradiation.