Photocatalytic degradation of erythromycin under visible light by zinc phthalocyanine-modified titania nanoparticles

摘要

Zinc phthalocyanine modified TiO_2 nanoparticles (Znpc-TiO_2)were prepared by the chemical impregnation method to improve the photocatalytic activity of TiO_2 under visible light. The prepared nanoparticles were characterized by UV-vis diffuse reflectance spectroscopy (UV-vis-DRS), X-ray powder diffraction, scanning electron microscopy transmission electron microscopy and Brunauer-Emmett-Teller. surface area analysis techniques. The photocatalytic activity of Znpc-TiO_2 was investigated for the degradation of erythromycin. The results revealed that UV-vis absorption edge of Znpc-TiO_2 is slightly shifted towards visible region and it has a higher surface area than that of TiO_2. The photocatalytic activity of Znpc-TiO_2 was superior (74.21%)than that of TiO_2 (31.57%). Besides the photocatalyst (Znpc-TiO_2)is stable and may be reused for several times.