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This study investigates the relative efficacy of two preparation methods for MIL-100(Fe) as photocatalysts in the visible light-induced degradation of Sulfamethazine (SMT). MIL-100(Fe) was synthesized through hydrothermal means and room temperature condition. Both variants underwent comprehensive characterization employing techniques such as FESEM, EDX, XRD, FTIR, Raman, BET, UV Vis-DRS, PL, and XPS analysis to delineate their morphological, physical, chemical and optical attributes. Additionally, photoelectrochemical properties were evaluated using EIS, MS, and photocurrent analysis. Band gap evaluated for MIL-100(Fe) synthesised through both routes are in visible-region. Photoluminescence (PL) assessment favoured hydrothermally synthesised MIL-100(Fe) as a superior photocatalyst. Despite comparable efficiencies in SMT degradation, hydrothermally synthesised MIL-100(Fe) exhibited slightly enhanced performance. To optimize operational parameters, including initial concentration, pH, and photocatalyst dosage, a Box-Behnken experimental design was implemented. Remarkably, after three consecutive cycles, negligible deterioration in photocatalyst performance was observed. Furthermore, a degradation mechanism was elucidated, supported by the identification of intermediate products through LC–MS analysis, which facilitated the proposal of a degradation pathway.

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Enhanced Electron Trapping Protocol of MIL-100(Fe) via Different Synthetic Routes for the Effective Visible Light Degradation of Sulfamethazine

  • 会议论文

  • 发表日期：

    2025年

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  • Shubham Raj,
  • Sibsankar Rahut,
  • Radhapada Manna,
  • Amar Nath Samanta

摘要

This study investigates the relative efficacy of two preparation methods for MIL-100(Fe) as photocatalysts in the visible light-induced degradation of Sulfamethazine (SMT). MIL-100(Fe) was synthesized through hydrothermal means and room temperature condition. Both variants underwent comprehensive characterization employing techniques such as FESEM, EDX, XRD, FTIR, Raman, BET, UV Vis-DRS, PL, and XPS analysis to delineate their morphological, physical, chemical and optical attributes. Additionally, photoelectrochemical properties were evaluated using EIS, MS, and photocurrent analysis. Band gap evaluated for MIL-100(Fe) synthesised through both routes are in visible-region. Photoluminescence (PL) assessment favoured hydrothermally synthesised MIL-100(Fe) as a superior photocatalyst. Despite comparable efficiencies in SMT degradation, hydrothermally synthesised MIL-100(Fe) exhibited slightly enhanced performance. To optimize operational parameters, including initial concentration, pH, and photocatalyst dosage, a Box-Behnken experimental design was implemented. Remarkably, after three consecutive cycles, negligible deterioration in photocatalyst performance was observed. Furthermore, a degradation mechanism was elucidated, supported by the identification of intermediate products through LC–MS analysis, which facilitated the proposal of a degradation pathway.