SYNTHESIS AND CHARACTERIZATION OF CALCINED MUSSEL SHELL CONTAINING g-C3N4/MOF COMPOSITE PHOTOCATALYSTS AND PHOTOCATALYTIC ACTIVITIES OVER PHOTOCATALYTIC DEGRADATION OF MICROPOLLUTANTS
Project no. 28469 · Status: Kapanmış · 2023
Summary
<p>In this study, 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 micro-organic pollutants such as Diuron (DRN) and Atrazine (ATZ). 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), XPS valence band (XPS-VB), and nitrogen adsorption studies. The effects of solution pH, oxidant concentration, catalyst amount, and initial pollutant concentration on photocatalytic oxidation were investigated and removal optimization was performed. The results obtained showed that the CMS/g-C3N4/MIL101 photocatalyst is highly active, achieving 60.5% DRN and 65.8% ATZ removal in 120 minutes. Furthermore, catalyst stability tests indicated that the CMS/g-C3N4/MIL101 composite has high stability. Experiments with radical scavenging agents concluded that O•2- and OH• played active roles in 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.</p>