Abstract
Abstract Novel g-C 3 N 4 /BiNbO 4 composite materials were successfully fabricated by a facile chemical impregnation method. The prepared composites were characterized by X-ray diffraction (XRD), Fourier transform infrared (FT-IR) spectra, X-ray photoelectron spectroscopy (XPS), field emission scanning electron microscopy (FE-SEM) with energy dispersive spectroscopy (EDS), B.E.T. surface area analysis, UV–vis diffuse reflectance spectra (UV-vis-DRS) analysis, photoluminescence (PL) spectra. The photocatalytic ability of the novel photocatalyst was investigated through the degradation of rhodamine B (RhB) under visible light irradiation. Experimental results showed that g-C 3 N 4 /BiNbO 4 displayed excellent photocatalytic activity. The degradation rate of RhB is nearly 100% within 40 min with visible light irradiation. Enhanced photocatalytic activity of g-C 3 N 4 /BiNbO 4 composite materials was attributed to the formation of the heterojunction between g-C 3 N 4 and BiNbO 4 , which suppresses the recombination of photogenerated electrons and holes. Furthermore, the stability of g-C 3 N 4 /BiNbO 4 composites for a photocatalytic reaction was also tested by recycling experiments. Therefore, g-C 3 N 4 /BiNbO 4 can be used as effective visible light photocatalysts.
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