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<p>A ternary visible-light-active photocatalyst, α-Fe<sub>2</sub>O<sub>3</sub>/V<sub>2</sub>O<sub>5</sub> embedded in molybdenum disulfide (FVM), was successfully synthesized via a simple wet impregnation method. The physicochemical properties of the photocatalyst were systematically characterized using XRD, SEM, EDX, FTIR, XPS, UV–Vis, and PL techniques. The results revealed that α-Fe<sub>2</sub>O<sub>3</sub>/V<sub>2</sub>O<sub>5</sub> components were uniformly dispersed over exfoliated few-layer MoS<sub>2</sub> nanosheets. The ternary formation of FVM nanocomposite accomplished an effective synergetic effect for the transportation of charge carriers across the heterojunction revealing a Z-scheme charge transfer mechanism for superior degradation performance. Notably, the synthesized FVM photocatalyst exhibited enhanced visible-light absorption capability, leading to superior removal efficiency of mixed dye and tetracycline (TC) pollutants under simulated sunlight irradiation. The pseudo-first-order reaction rate constants for the degradation of methylene blue (MB) and rhodamine B (Rh B) were found to be 6.19 and 6.67 times higher, respectively, than those of α-Fe<sub>2</sub>O<sub>3</sub> (FO) photocatalyst. Moreover, the substantial improvement in degradation efficiency was attained due to appropriate band structure, efficient charge separation and migration of photo-produced e<sup>−</sup>/h<sup>+</sup> pairs with strong stability and reusability. This study strongly suggests that the synthesized FVM photocatalyst provides potential application for the elimination of TC pollutants and mixed dyes in environmental wastewater.</p> Graphical abstract <p></p>

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Engineering an environmentally benign dual Z-scheme Fe2O3–V2O5/MoS2 nanocomposite for efficient removal of mixed dyes and pharmaceutical pollutants

  • 期刊论文

  • 发表日期：

    2025年8月5日

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  • Gopal Venkatesh,
  • Kareem Mazen,
  • Kumar Manimaran,
  • Fatin Samara,
  • Sofian Kanan

摘要

A ternary visible-light-active photocatalyst, α-Fe2O3/V2O5 embedded in molybdenum disulfide (FVM), was successfully synthesized via a simple wet impregnation method. The physicochemical properties of the photocatalyst were systematically characterized using XRD, SEM, EDX, FTIR, XPS, UV–Vis, and PL techniques. The results revealed that α-Fe2O3/V2O5 components were uniformly dispersed over exfoliated few-layer MoS2 nanosheets. The ternary formation of FVM nanocomposite accomplished an effective synergetic effect for the transportation of charge carriers across the heterojunction revealing a Z-scheme charge transfer mechanism for superior degradation performance. Notably, the synthesized FVM photocatalyst exhibited enhanced visible-light absorption capability, leading to superior removal efficiency of mixed dye and tetracycline (TC) pollutants under simulated sunlight irradiation. The pseudo-first-order reaction rate constants for the degradation of methylene blue (MB) and rhodamine B (Rh B) were found to be 6.19 and 6.67 times higher, respectively, than those of α-Fe2O3 (FO) photocatalyst. Moreover, the substantial improvement in degradation efficiency was attained due to appropriate band structure, efficient charge separation and migration of photo-produced e−/h+ pairs with strong stability and reusability. This study strongly suggests that the synthesized FVM photocatalyst provides potential application for the elimination of TC pollutants and mixed dyes in environmental wastewater.

Graphical abstract