Preparation of Pt-Loaded Titania Nanotube and Its Photocatalytic Performance

Titania nanotubes (TNT) were obtained by calcining titanate nanotube, which was prepared via a hydrothermal method, at 300, 400 and 500℃ for 5 h. Pt-loaded titania nanotubes were prepared by photo-deposition method using chloro-platinic acid as the Pt source and TNT as the base. Techniques of XRD, TEM and XPS were used to characterize the structure of TNT and Pt-loaded TNT. Rhodamine B (RB) aqueous solution was selected as a probe to evaluate the photocatalytic activities of Pt-loaded titania nanotube. Results show that Pt-loaded titania nanotubes have higher photocatalytic activity for RB than TNT. Compared with Pt-loaded TNT, that the Pt particles were deposited on both inner and outer surfaces of TNT, the Pt-loaded TNT, that the Pt particles were deposited only on the inner surface of TNT by rinsing the chloro-platinic acid on its outer surface, owns furthermore higher photocatalytic efficiency.