IONIC LIQUID ASSISTED SYNTHESIS OF Cu/g-C3N4 COM- POSITES WITH ENHANCED VISIBLE LIGHT PHOTO CATALYTIC ACTIVITY

摘要

The Cu/g-C3N4 composites were synthesized facilely by a simple solvothermal method with bis(3-methyl-1-octylimidazolium) tetrachlorocuprate ([Omim]2CuCl4) ionic liquid. X-ray diffraction (XRD), transmission electron microscope (TEM), diffuse-reflection spectra (DRS) and Fourier transform infrared spectroscopy (FT-IR) were applied to characterize the samples. The photocatalytic property of Cu/g-C3N4 composites was evaluated by removing methylene blue (MB) with the presence of H2O2 under visible-light irradiation. TEM analysis showed that Cu nanoparticles were deposited on the surface of the flake-like g-C3N4. Cu/g-C3N4 with the presence of H2O2 composites exhibited much higher photocatalytic activity for photodegradation of methylene blue (MB) than the pure g-C3N4 crystals. The Cu/g-C3N4 (5 wt%) photocatalyst presented the highest photocatalytic activity, owing to the presence of active species such as ?22 - , holes, and ?2+LQWKLVVVWHP IRUHIIHctive degradation.