مشخصات پژوهش

This research combines plasmonic Ag@Au nanoparticles with C3N5 nanosheets to enhance the visible-lightdriven photocatalytic activity of C3N5. The nanocomposite was extensively characterized using various techniques, including X-ray diffraction (XRD), UV-Vis spectroscopy, field emission scanning electron microscopy (FESEM), energy-dispersive X-ray spectroscopy (EDS), Brunauer-Emmett-Teller analysis (BET), high-resolution transmission electron microscopy (HR-TEM), X-ray photoelectron spectroscopy (XPS), and photoluminescence spectroscopy (PL) analysis. The presence of Ag@Au nanoparticles on the surface of C3N5 nanosheets is evident in the FE-SEM images. The UV-Vis absorption spectrum of Ag@Au core-shell nanoparticles exhibits two prominent plasmon bands in the 400–600 nm region, attributed to the localized surface plasmon resonance (LSPR) of the individual metallic components. The synthesized Ag@Au-C3N5 nanocomposite demonstrated a significantly higher SBET of 60.6 m²/g compared to the C3N5 nanosheets (34.9 m²/g). The prepared Ag@Au-C3N5 was able to degrade 96.5 % of 10 mg/L of methylene blue (MB) and 81.7 % 10 mg/L of Tetracycline (TC) in a visible-lightdriven photocatalytic process after 60 min. The degradation experiments performed in the presence of various radical scavengers confirmed that the direct degradation of the MB molecules by the photogenerated holes was responsible for the photocatalytic performance of the Ag@Au-C3N5 nanocomposite.