Pt/N-codoped TiO2 nanotubes and its photocatalytic activity under visible light

Pt/N-codoped TiO2 nanotubes were prepared and characterized by various analytical methods, such as transmission electron microscope (TEM), diffuse reflection spectra (DRS), X-ray powder diffraction (XRD), X-ray photoelectron emission spectroscopy (XPS) and fluorescence spectra (FL). The photocatalytic efficiency was evaluated by the photodegradation of Rhodamine B (RB) in an aqueous solution under visible light irradiation. It has been confirmed that Pt/N-codoped TiO2 nanotubes could be excited by visible light and the recombination rate of electron–hole pairs declined significantly. The higher visible light activity is due to the codoping of nitrogen and platinum.