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<p>A ternary composite photocatalyst of mussel shell-supported g-C<sub>3</sub>N<sub>4</sub>/MOF (CMS/g-C<sub>3</sub>N<sub>4</sub>/MIL101) was prepared, and its activity was tested in the photocatalytic oxidation of pesticide Diuron (DRN). The prepared catalysts were characterized using X-ray diffraction (XRD), UV-visible diffuse reflectance spectroscopy (UV-Vis DRS), scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS), Fourier transform infrared spectroscopy (FTIR), photoluminescence (PL), and XPS valence band (XPS-VB). The effects of solution pH, oxidant concentration, catalyst amount, and initial pollutant concentration on photocatalytic oxidation were investigated, and process optimization was performed. The results showed that the CMS/g-C<sub>3</sub>N<sub>4</sub>/MIL101 photocatalyst is highly active, achieving 60.5% DRN removal in 120&#xa0;min under visible LED light. Furthermore, catalyst stability tests indicated that the CMS/g-C<sub>3</sub>N<sub>4</sub>/MIL101 composite exhibits remarkable stability. Experiments utilizing radical scavenging agents determined that O•<sub>2</sub><sup>−</sup> and OH• actively contributed to the photocatalytic oxidation of DRN. Toxicity test results revealed that the treated DRN solution was less toxic than the untreated DRN solution. The photocatalytic degradation mechanism of DRN in the presence of CMS/g-C<sub>3</sub>N<sub>4/</sub>MIL101 was also elucidated.</p>

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Sustainable photocatalysis: mussel shell-derived g-C3N4/MOF composites for diuron removal

  • 期刊论文

  • 发表日期：

    2025年6月23日

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  • Nazire Merve Akbaş Güney,
  • Meral Dükkancı

摘要

A ternary composite photocatalyst of mussel shell-supported g-C3N4/MOF (CMS/g-C3N4/MIL101) was prepared, and its activity was tested in the photocatalytic oxidation of pesticide Diuron (DRN). The prepared catalysts were characterized using X-ray diffraction (XRD), UV-visible diffuse reflectance spectroscopy (UV-Vis DRS), scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS), Fourier transform infrared spectroscopy (FTIR), photoluminescence (PL), and XPS valence band (XPS-VB). The effects of solution pH, oxidant concentration, catalyst amount, and initial pollutant concentration on photocatalytic oxidation were investigated, and process optimization was performed. The results showed that the CMS/g-C3N4/MIL101 photocatalyst is highly active, achieving 60.5% DRN removal in 120 min under visible LED light. Furthermore, catalyst stability tests indicated that the CMS/g-C3N4/MIL101 composite exhibits remarkable stability. Experiments utilizing radical scavenging agents determined that O•2− and OH• actively contributed to the photocatalytic oxidation of DRN. Toxicity test results revealed that the treated DRN solution was less toxic than the untreated DRN solution. The photocatalytic degradation mechanism of DRN in the presence of CMS/g-C3N4/MIL101 was also elucidated.