Abstract
Copper nitride/cuprous oxide/carbon nitride/copper (Cu3N/Cu2O/C3N4/Cu) composite material was synthesized by one step thermal decomposition of copper-melamine complexes under N2 atmosphere. The as-synthesized powders were characterized by X-ray diffraction (XRD), scanning electron microscope (SEM), transmission electron microscope (TEM), and X-ray photoelectron spectroscopy (XPS). The XRD analysis showed the mix phase of Cu3N, Cu2O, C3N4 and Cu. The photocatalytic activities of Cu3N/Cu2O/C3N4/Cu composite photocatalysts were evaluated by testing the photoreduction of chromium (VI) under UV–visible light irradiation. The results indicated that the synthesized samples are attractive photocatalysts for reduction of chromium (VI) under UV light irradiation. The photoreduction efficiencies of Cu3N/Cu2O/C3N4/Cu composite at 550 °C with TEOA induced by UV light within 120 min were 92.03 % caused by charge diffusion at the Cu3N/Cu2O/C3N4/Cu interface. The results indicated that the synthesized samples are attractive photocatalysts for reduction of chromium (VI) under UV light irradiation.
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