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<p>A highly efficient heterostructured photocatalyst was synthesized using a dual metal-organic framework (MOF)-derived method, succeeded by carbonization, selenization, and hydrothermal hybridization with g-C<sub>3</sub>N<sub>4</sub>, referred to as ZnSe&amp;CoSe<sub>2</sub>@N-doped carbon/g-C<sub>3</sub>N<sub>4</sub>. The structural, optical, textural, morphological, and electrochemical properties were examined using XRD, FT-IR, DRS, surface area analysis, TEM/HR-TEM, SEM images, EDX mapping, photoluminescence spectroscopy, cyclic voltammetry, chronoamperometry, and Mott–Schottky analysis. The optimized 3 wt% ZnSe&amp;CoSe<sub>2</sub>@N-doped C/g-C<sub>3</sub>N<sub>4</sub> composite exhibited superior photocatalytic degradation of methylene blue (MB) and rhodamine B (RhB), in contrast to g-C<sub>3</sub>N<sub>4</sub> and ZnSe&amp;CoSe<sub>2</sub>@N-doped C. The heightened activity is attributed to effective heterojunction creation, enhanced charge transfer, less electron-hole recombination, and improved light absorption. Radical-trapping experiments indicated that hydroxyl radicals were the reactive species involved in dye degradation, whereas electrochemical assessments validated improved charge separation and interfacial carrier mobility. The addition of H<sub>2</sub>O<sub>2</sub> enhanced the degradation efficiency to over 97% and reduced the degradation time (&lt; 20&#xa0;min) by facilitating the generation of •OH radicals.</p>

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MOF-Derived ZnSe&CoSe2@N-Doped Carbon/g-C3N4 for Efficient Photodegradation of Organic Dyes

  • 期刊论文

  • 发表日期：

    2026年5月28日

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  • Zeinab M. Hassan,
  • Amany S. Abdelhamid,
  • Ghada M. Abd El-Hafez,
  • Mohamed E. Goher,
  • Haitham M. El-Bery,
  • Hani Nasser Abdelhamid

摘要

A highly efficient heterostructured photocatalyst was synthesized using a dual metal-organic framework (MOF)-derived method, succeeded by carbonization, selenization, and hydrothermal hybridization with g-C3N4, referred to as ZnSe&CoSe2@N-doped carbon/g-C3N4. The structural, optical, textural, morphological, and electrochemical properties were examined using XRD, FT-IR, DRS, surface area analysis, TEM/HR-TEM, SEM images, EDX mapping, photoluminescence spectroscopy, cyclic voltammetry, chronoamperometry, and Mott–Schottky analysis. The optimized 3 wt% ZnSe&CoSe2@N-doped C/g-C3N4 composite exhibited superior photocatalytic degradation of methylene blue (MB) and rhodamine B (RhB), in contrast to g-C3N4 and ZnSe&CoSe2@N-doped C. The heightened activity is attributed to effective heterojunction creation, enhanced charge transfer, less electron-hole recombination, and improved light absorption. Radical-trapping experiments indicated that hydroxyl radicals were the reactive species involved in dye degradation, whereas electrochemical assessments validated improved charge separation and interfacial carrier mobility. The addition of H2O2 enhanced the degradation efficiency to over 97% and reduced the degradation time (< 20 min) by facilitating the generation of •OH radicals.