BiVO4 nanocrystals,BiVO4/Cu2O and BiVO4/Ag/Cu2O nanocomposites were successfully synthesized using hydrothermal and wet chemical reduction methods.X-ray diffraction(XRD),field emission scanning electron microscopy(SEM)and UV-Vis spectrophotometer were used to analyze the structure,microstructure and the photocatalytic degradation effect towards tetracycline of the three samples.Experimental results indicate that Cu2O and Ag nanocrystals are successfully attached to the surfaces of BiVO4 nanocrystals with similar decahedral shape.BiVO4 nanocrystals,BiVO4/Cu2O and BiVO4/Ag/Cu2O nanocomposites show different degradation effects towards tetracycline.Among them,BiVO4/Ag/Cu2O nanocomposites exhibit the strongest photocatalytic performance and maintain excellent catalytic performance even after six cycles.This study provides a new idea for the optimization of photocatalyst and shows a broad application prospect in the treatment of organic wastewater.
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