Abstract
Graphite-like C3N4 (g-C3N4) modified Ag3PO4 nanoparticles with highly enhanced photocatalytic activities under visible light irradiation (λ≥400nm) compared to the bare Ag3PO4 nanoparticles were prepared by a facile chemisorption method. The resulting C3N4/Ag3PO4 composite photocatalysts were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), Fourier transform infrared spectroscopy (FT-IR) and ultraviolet–visible diffuse reflectance spectra (DRS). Enhanced charge separation efficiency was confirmed by electrochemical impedance spectroscopy (EIS) measurements. The enhanced photocatalytic activities were mainly ascribed to the synergistic effect between C3N4 and Ag3PO4 which led to an improved separation efficiency of electron-hole pairs. The high-efficient hybrid photocatalysts are expected to show considerable potential applications in wastewater treatment and water splitting.
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