New Simple Synthesis of Cu–TiO2 Nanocomposite: Highly Enhanced Photocatalytic Killing of Epithelia Carcinoma (HeLa) Cells
Cu-TiO 2 nanocomposites with different Cu/TiO 2 molar ratios were synthesized by a new simple chemical reduction method. The morphological structure and the surface species of Cu-TiO 2 nanocomposites were determined by using UVvis absorption spectroscopy, TEM, XPS, XRD, and EDX techniques. The photocatalytic cytotoxicity of Cu-TiO 2 nanocomposites was investigated under UV-vis light irradiation. The cytotoxicity depends on the molar ratio of Cu to Ti0 2 , ranging from 0.2 to 5.